IEEE 802.11-2020 Standardized Reason Codes and Status codes for the 802.11 WiFi network

The IEEE 802.11-2020 Standardized Reason Codes

The IEEE 802.11-2020 standard, which defines the technical specifications for Wi-Fi, includes a set of standardized reason codes used in management frames (specifically deauthentication and disassociation frames) to indicate why a station (STA) or access point (AP) has terminated a connection. These reason codes are critical for network management, troubleshooting, and ensuring interoperability across devices in Wi-Fi networks. They are specified in Section 9.4.1.7 of the IEEE 802.11-2020 standard (Reason Code field) and listed in Table 9-49.

User can check the logs of Access point or the WiFi router, and see the error codes to identify the network related issue that is causing the problem in Wireless network.

Overview of Reason Codes in IEEE 802.11-2020

Reason codes are 16-bit values included in the Reason Code field of deauthentication and disassociation frames, as defined in Section 9.3.3.6 (Deauthentication frame format) and Section 9.3.3.7 (Disassociation frame format) of the IEEE 802.11-2020 standard. These codes communicate the reason for terminating a connection, allowing devices to respond appropriately (e.g., retrying authentication, switching APs, or logging errors). The codes apply to various Wi-Fi network types, including:

Infrastructure networks (Extended Service Set, ESS): Common in homes, offices, and public Wi-Fi.
Ad hoc networks (Independent Basic Service Set, IBSS): Peer-to-peer Wi-Fi connections.
Mesh networks (IEEE 802.11s): Self-configuring networks for IoT or large-scale deployments.
Tunneled Direct Link Setup (TDLS): Direct STA-to-STA communication.

The reason codes are categorized based on their purpose, such as general disconnections, security issues, Quality of Service (QoS) constraints, and mesh networking. The standard defines codes 0–77, with codes above 100 often used for vendor-specific purposes.

Categories of Reason Codes

To provide a structured explanation, I’ll group the reason codes into five categories, as done in the previous response, but with a deeper dive into their technical details, frame interactions, and practical implications. The categories are:

Reserved Codes
General Disconnection Codes
Security-Related Codes
QoS and Resource Management Codes
Mesh Networking Codes

Below, I’ll list each code, its description, technical context, and use cases, followed by a summary of each category’s significance.

1. Reserved Codes

Reason Codes: 0, 12, 31–45, 55–65, 78–65535
Description: These codes are not assigned specific meanings in the IEEE 802.11-2020 standard and are reserved for future use or vendor-specific implementations. Code 0 is explicitly unused, while codes 78–65535 provide a large range for future extensions or proprietary reasons (vendors typically use codes above 100).
Technical Context:
- Reserved codes ensure the standard remains extensible without breaking existing implementations.
- The Reason Code field is a 16-bit unsigned integer, allowing for 65,536 possible values (0–65535), with only 0–77 defined in the standard.
- Vendor-specific codes must not conflict with standardized codes to maintain interoperability.
Use Cases:
- Future IEEE 802.11 amendments may assign new codes for emerging features (e.g., Wi-Fi 7 or beyond).
- Vendors may use high-numbered codes (e.g., >100) for proprietary features, such as custom load balancing or debugging.
Count: 48 explicitly listed codes (0, 12, 31–45, 55–65), plus the range 78–65535 (not typically counted in practical breakdowns due to its size).
Significance: Reserved codes provide flexibility for future standardization and vendor innovation, ensuring the protocol can evolve.

2. General Disconnection Codes

Reason Codes: 1, 3–9, 11, 13, 29–30, 46, 51
Description: These codes cover routine disconnections due to network management, protocol violations, or client behavior (e.g., leaving the network or inactivity). They are used in both infrastructure and ad hoc networks.
Details and Use Cases:
- Code 1: Unspecified reason
  - Context: A generic code used when no specific reason applies or the AP/STA chooses not to disclose details.
  - Frame Usage: Common in deauthentication/disassociation frames for implementation-specific reasons.
  - Example: An AP deauthenticates an STA due to a proprietary policy (e.g., low signal strength) not covered by other codes.
- Code 3: Deauthenticated because sending STA is leaving (or has left) IBSS or ESS
  - Context: Used when the sending device (STA or AP) is leaving the network, either voluntarily or due to loss of connectivity.
  - Frame Usage: Deauthentication frame sent by an STA or AP.
  - Example: A laptop shuts down, sending a deauthentication frame to the AP, or an AP detects an STA has moved out of range.
- Code 4: Disassociated due to inactivity
  - Context: The AP disassociates an STA that has not sent/received frames within a timeout period (defined by the AP’s inactivity timer).
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: A smartphone in sleep mode stops communicating, prompting the AP to free resources.
- Code 5: Disassociated because AP is unable to handle all currently associated STAs
  - Context: The AP is overloaded (e.g., too many connected STAs) and must disassociate some to maintain performance.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: In a crowded venue, an AP disassociates low-priority STAs to prioritize others.
- Code 6: Class 2 frame received from nonauthenticated STA
  - Context: An STA sends a Class 2 frame (e.g., data or certain management frames) without completing authentication.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: A rogue device attempts to send data frames before authenticating, triggering deauthentication.
- Code 7: Class 3 frame received from nonassociated STA
  - Context: An STA sends a Class 3 frame (e.g., QoS data or advanced management frames) without being associated.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An unauthenticated STA sends a QoS data frame, violating protocol rules.
- Code 8: Disassociated because sending STA is leaving (or has left) BSS
  - Context: Similar to code 3 but specific to a Basic Service Set (BSS). Used when an STA leaves a single AP’s coverage.
  - Frame Usage: Disassociation frame sent by the STA or AP.
  - Example: An STA roams to another AP, prompting disassociation from the current BSS.
- Code 9: STA requesting (re)association is not authenticated with responding STA
  - Context: An STA attempts to associate or reassociate without completing authentication.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: A client tries to reassociate after a session timeout without re-authenticating.
- Code 11: Disassociated because the information in the Supported Channels element is unacceptable
  - Context: The STA’s supported channels (advertised in management frames) are incompatible with the AP’s configuration.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA supports only 2.4 GHz channels, but the AP operates exclusively on 5 GHz.
- Code 13: Invalid information element
  - Context: The STA sends a management frame with an invalid or non-compliant information element (IE).
  - Frame Usage: Deauthentication or disassociation frame sent by the AP.
  - Example: A malformed IE in an association request causes the AP to reject the STA.
- Code 29: Bad channel
  - Context: The STA is operating on a channel not supported by the AP.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA attempts to connect on a channel restricted by local regulations.
- Code 30: Beacon frame loss
  - Context: The STA fails to receive beacon frames, indicating loss of connectivity.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA moves out of range and misses multiple beacons, prompting disassociation.
- Code 46: Disassociated because the STA is not present in the BSS
  - Context: The AP determines the STA is no longer in the BSS (e.g., due to signal loss).
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA powers off without notifying the AP, leading to disassociation.
- Code 51: Disassociated because the requesting STA is leaving the BSS (or resetting)
  - Context: The STA explicitly requests disassociation due to leaving the BSS or resetting.
  - Frame Usage: Disassociation frame sent by the STA or AP.
  - Example: A client sends a disassociation frame before rebooting.
Count: 13 codes.
Significance: These codes handle routine network operations, ensuring efficient resource use, protocol compliance, and smooth transitions during roaming or disconnection.

3. Security-Related Codes

Reason Codes: 2, 14–24
Description: These codes address security-related issues, such as authentication failures, key management errors, and cipher suite mismatches. They are critical for maintaining secure Wi-Fi networks, particularly those using WPA2, WPA3, or IEEE 802.1X.
Details and Use Cases:
- Code 2: Previous authentication no longer valid
  - Context: The STA’s prior authentication (e.g., session keys) has expired or been revoked.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: A WPA3 session key times out, requiring re-authentication.
- Code 14: Message integrity code (MIC) failure
  - Context: A frame’s MIC (used in WPA/WPA2/WPA3 for integrity) is incorrect, indicating potential tampering or error.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: A corrupted or malicious frame triggers a security alert, leading to deauthentication.
- Code 15: 4-way handshake timeout
  - Context: The 4-way handshake (for pairwise key exchange in WPA/WPA2/WPA3) times out.
  - Frame Usage: Deauthentication frame sent by the AP or STA.
  - Example: A client fails to respond during the WPA3 handshake due to interference or misconfiguration.
- Code 16: Group key handshake timeout
  - Context: The group key handshake (for broadcast/multicast keys) times out.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA does not acknowledge group key updates, disrupting secure multicast traffic.
- Code 17: Information element in 4-way handshake different from (Re)Association Request/Probe Response/Beacon frame
  - Context: Security parameters in the 4-way handshake do not match those in prior frames.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA sends inconsistent RSN IEs during the handshake, indicating a potential security issue.
- Code 18: Invalid group cipher
  - Context: The STA requests an unsupported or deprecated group cipher.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA attempts to use WEP, which the AP rejects.
- Code 19: Invalid pairwise cipher
  - Context: The STA requests an unsupported or deprecated pairwise cipher.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA proposes a cipher suite not supported by the AP’s WPA3 policy.
- Code 20: Invalid AKMP (Authentication and Key Management Protocol)
  - Context: The STA requests an unsupported AKMP (e.g., PSK vs. 802.1X).
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA attempts to use an outdated authentication protocol.
- Code 21: Unsupported RSN information element version
  - Context: The STA’s RSN IE version is not supported by the AP.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA uses an obsolete RSN version incompatible with the AP.
- Code 22: Invalid RSN information element capabilities
  - Context: The STA’s RSN IE capabilities conflict with the AP’s security policy.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An STA requests unsupported security features, such as a specific key management scheme.
- Code 23: IEEE 802.1X authentication failed
  - Context: The STA fails 802.1X authentication (e.g., via RADIUS).
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: Incorrect credentials in an enterprise network cause authentication failure.
- Code 24: Cipher suite rejected because of the security policy
  - Context: The AP rejects the STA’s cipher suite due to its security policy.
  - Frame Usage: Deauthentication frame sent by the AP.
  - Example: An AP configured for high security rejects a weak cipher like TKIP.
Count: 11 codes.
Significance: These codes enforce robust security, prevent unauthorized access, and mitigate attacks (e.g., MIC failures indicating tampering). They are critical in enterprise and secure home networks.

4. QoS and Resource Management Codes

Reason Codes: 10, 27–28, 47–50, 52–54
Description: These codes handle disconnections due to Quality of Service (QoS) requirements, resource constraints, or policy violations. They are used in networks with QoS enabled, such as those supporting multimedia or real-time applications.
Details and Use Cases:
- Code 10: Disassociated because the information in the Power Capability element is unacceptable
  - Context: The STA’s power capability (e.g., transmit power limits) does not meet the AP’s requirements.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA’s low transmit power violates regulatory or AP requirements.
- Code 27: Disassociated because session terminated by SSP (Service Set Provider) request
  - Context: The session is terminated at the request of the Service Set Provider (e.g., network administrator).
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An admin manually disconnects a client for policy reasons.
- Code 28: Disassociated due to lack of resources to support SSP
  - Context: The AP lacks resources to support SSP-related services.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An AP in a resource-constrained environment cannot handle additional SSP clients.
- Code 47: Disassociated because the STA is not QoS capable
  - Context: The STA lacks support for required QoS features (e.g., 802.11e).
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: A legacy STA without QoS support connects to a QoS-enabled AP.
- Code 48: Disassociated because the QoS AP or PCP lacks sufficient bandwidth for this QoS STA
  - Context: The AP or Priority Control Point (PCP) cannot provide the required bandwidth for a QoS STA.
  - Frame Usage: Disassociation frame sent by the AP or PCP.
  - Example: An AP in a congested network cannot meet a VoIP client’s bandwidth needs.
- Code 49: Disassociated because of excessive number of frames that need to be acknowledged, but are not acknowledged
  - Context: The STA fails to acknowledge an excessive number of frames, indicating connectivity issues.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: A client with poor signal quality fails to send ACKs, disrupting QoS.
- Code 50: Disassociated because the STA is transmitting outside the limits of its TXOPs
  - Context: The STA violates its allocated Transmission Opportunities (TXOPs) in a QoS-enabled network.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA sends data outside its scheduled TXOP, disrupting QoS scheduling.
- Code 52: Disassociated because the requesting STA does not want to use the mechanism
  - Context: The STA refuses to use a required mechanism (e.g., QoS or security protocol).
  - Frame Usage: Disassociation frame sent by the AP or STA.
  - Example: An STA rejects the AP’s mandatory QoS mechanism.
- Code 53: Disassociated because the requesting STA requires the mechanism to be used
  - Context: The STA requires a mechanism (e.g., QoS) that the AP does not support.
  - Frame Usage: Disassociation frame sent by the AP or STA.
  - Example: An STA demands a specific QoS feature not supported by the AP.
- Code 54: Disassociated because the requesting STA requires a change in the requested parameters
  - Context: The STA requests unsupported QoS or other parameters.
  - Frame Usage: Disassociation frame sent by the AP.
  - Example: An STA requests incompatible QoS parameters during association.
Count: 9 codes.
Significance: These codes ensure efficient resource allocation and QoS compliance, critical for high-performance networks supporting real-time applications like VoIP or streaming.

5. Mesh Networking Codes

Reason Codes: 25–26, 66–77
Description: These codes are specific to IEEE 802.11s mesh networks (and TDLS for codes 25–26), which enable self-configuring networks without traditional APs. They address peering, path selection, security, and regulatory issues in mesh environments.
Details and Use Cases:
- Code 25: TDLS direct-link teardown due to TDLS peer STA unreachable via the TDLS direct link
  - Context: The TDLS peer STA is no longer reachable, terminating the direct link.
  - Frame Usage: Deauthentication frame sent by the STA.
  - Example: A device in a TDLS session moves out of range.
- Code 26: TDLS direct-link teardown for unspecified reason
  - Context: A generic reason for terminating a TDLS direct link.
  - Frame Usage: Deauthentication frame sent by the STA.
  - Example: An implementation-specific issue prompts TDLS teardown.
- Code 66: Mesh peering canceled for unknown reasons
  - Context: A mesh peering session is terminated without a specific reason.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh node cancels peering for proprietary reasons.
- Code 67: Mesh maximum number of peers reached
  - Context: The mesh STA has reached its maximum number of peer connections.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh node rejects a new peering request due to resource limits.
- Code 68: Mesh configuration policy violation
  - Context: The mesh STA violates the network’s configuration policy.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh STA uses incompatible parameters, such as incorrect security settings.
- Code 69: Mesh close received
  - Context: The mesh STA receives an explicit close message, terminating the peering session.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh peer sends a close message to end the connection.
- Code 70: Mesh maximum retries exceeded
  - Context: The mesh STA exceeds the maximum retries for establishing or maintaining a peering session.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh node fails to establish a link after multiple attempts.
- Code 71: Mesh confirm timeout
  - Context: The mesh STA times out while waiting for a peering confirmation.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A peering handshake fails due to a timeout.
- Code 72: Mesh invalid GTK (Group Temporal Key)
  - Context: The mesh STA provides an invalid GTK during the security handshake.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A security key mismatch disrupts mesh peering.
- Code 73: Mesh invalid PMK (Pairwise Master Key)
  - Context: The mesh STA provides an invalid PMK during the security handshake.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: An incorrect PMK causes authentication failure in a mesh network.
- Code 74: Mesh path error
  - Context: A routing path in the mesh network is invalid or unavailable.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh node cannot establish a valid path to the destination.
- Code 75: Mesh path target unreachable
  - Context: The target of a mesh path is unreachable.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh node cannot reach another node due to network topology changes.
- Code 76: Mesh channel switch regulatory requirement
  - Context: The mesh STA is deauthenticated due to a regulatory-mandated channel switch.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh network switches channels to comply with local regulations.
- Code 77: Mesh channel switch unspecified
  - Context: The mesh STA is deauthenticated due to an unspecified channel switch.
  - Frame Usage: Deauthentication frame sent by the mesh STA.
  - Example: A mesh network changes channels for operational reasons.
Count: 14 codes.
Significance: These codes support the growing use of mesh networks in IoT, smart homes, and large-scale deployments, ensuring robust peering, routing, and regulatory compliance.

Implementation Notes

Frame Structure: The Reason Code field is a 2-byte field in the deauthentication or disassociation frame, as defined in IEEE 802.11-2020, Section 9.3.3.6 (Deauthentication frame format) and Section 9.3.3.7 (Disassociation frame format).
Interoperability: Standardized reason codes ensure that devices from different vendors can communicate disconnection reasons consistently, improving interoperability.
Logging and Analytics: Modern APs and network management systems log these codes for analytics, helping operators optimize network performance and security.

Technical Details and Frame Structure

Frame Format: The Reason Code field is a 2-byte (16-bit) field in the frame body of deauthentication and disassociation frames. The frame format includes:
- Frame Control: Indicates the frame type (deauthentication or disassociation).
- Duration/ID: Duration or association ID.
- Addresses: Destination, source, and BSS ID.
- Reason Code: The 16-bit code indicating the reason for disconnection.
- Other Fields: Optional IEs or management frame-specific data.
Frame Types:
- Deauthentication Frame: Terminates authentication, breaking the security association.
- Disassociation Frame: Terminates association, typically after authentication but before data transfer.
Protocol Flow:
- Authentication → Association → Data Transfer → (Deauthentication/Disassociation if needed).
- Reason codes are sent in the final step to indicate why the connection is terminated.
Interoperability: Standardized codes ensure devices from different vendors (e.g., Cisco, Ubiquiti, Intel) interpret disconnection reasons consistently.

Practical Applications of IEEE 802.11-2020 Reason Codes

The reason codes serve multiple practical purposes in Wi-Fi network management and operation. Below, I outline the key applications, followed by examples organized by the previously discussed categories: General Disconnection, Security-Related, QoS and Resource Management, and Mesh Networking. (Reserved codes are excluded from examples, as they are not used in practice.)

Troubleshooting and Diagnostics:
- Purpose: Reason codes provide specific information about why a connection was terminated, helping network administrators identify issues like connectivity problems, misconfigurations, or device failures.
- Use Case: Logs containing reason codes are analyzed to pinpoint recurring issues, such as frequent deauthentications due to handshake timeouts or signal loss.
- Tools: Network management systems (e.g., Cisco Meraki, Ubiquiti UniFi) or protocol analyzers (e.g., Wireshark) display reason codes to aid diagnostics.
Security Enforcement and Monitoring:
- Purpose: Security-related reason codes help detect and mitigate potential attacks, misconfigurations, or unauthorized access attempts by identifying issues like invalid ciphers or authentication failures.
- Use Case: Codes like 14 (MIC failure) trigger alerts in intrusion detection systems, prompting further investigation into possible attacks.
- Tools: Security Information and Event Management (SIEM) systems or AP dashboards use these codes to flag suspicious activity.
Resource Management and Load Balancing:
- Purpose: Codes related to resource constraints or QoS issues allow APs to manage limited resources (e.g., bandwidth, processing capacity) in high-density environments.
- Use Case: APs use codes like 5 (AP overload) to disconnect low-priority STAs, ensuring performance for critical devices.
- Tools: Enterprise APs with load balancing features (e.g., Aruba, Ruckus) leverage these codes to optimize network performance.
Client Roaming and Mobility:
- Purpose: Reason codes facilitate smooth transitions when STAs move between APs or BSSs, ensuring seamless connectivity in mobile environments.
- Use Case: Codes like 3 (STA leaving ESS) and 8 (STA leaving BSS) are used during roaming to inform the network of client movement.
- Tools: Fast roaming protocols (e.g., 802.11r) rely on these codes to coordinate handoffs.
Mesh Network Management:
- Purpose: Mesh-specific codes support the dynamic, self-configuring nature of IEEE 802.11s mesh networks, handling peering, routing, and regulatory compliance.
- Use Case: Codes like 67 (max peers reached) or 74 (mesh path error) help maintain robust mesh topologies in IoT or outdoor deployments.
- Tools: Mesh network controllers (e.g., Zigbee, Thread, or Wi-Fi mesh systems like Eero) use these codes for topology management.
Interoperability and Standards Compliance:
- Purpose: Standardized reason codes ensure that devices from different vendors (e.g., Intel, Qualcomm, Cisco) handle disconnections consistently, improving interoperability.
- Use Case: A client device from one vendor can correctly interpret a deauthentication reason from an AP by another vendor, ensuring predictable behavior.
- Tools: Wi-Fi Alliance certifications ensure devices implement these codes correctly.
Network Optimization and Policy Enforcement:
- Purpose: Codes allow APs to enforce network policies, such as QoS requirements, security protocols, or channel compatibility.
- Use Case: Codes like 10 (unacceptable power capability) or 24 (cipher rejected by policy) enforce compliance with network configurations.
- Tools: Network management platforms configure policies that trigger specific reason codes.

Examples of use of Reason Code

Below, I provide practical examples for each category of reason codes, illustrating how they are used in real-world scenarios. Each example includes the context, the specific reason code, and how it contributes to network management. The examples are drawn from common Wi-Fi environments, such as enterprise networks, public hotspots, home networks, and IoT deployments.

1. General Disconnection Codes (Codes 1, 3–9, 11, 13, 29–30, 46, 51)

These codes handle routine disconnections due to client behavior, protocol violations, or network management needs.

Code 1: Unspecified reason
- Scenario: A public Wi-Fi hotspot in a coffee shop deauthenticates a user’s laptop due to a proprietary policy (e.g., session time limit).
- Application: The AP logs code 1, allowing the administrator to track disconnections without exposing internal policy details. The user is prompted to reconnect or accept terms again.
- Impact: Simplifies logging for non-specific issues, maintaining user experience without revealing sensitive AP logic.
Code 4: Disassociated due to inactivity
- Scenario: In an office network, an employee’s smartphone enters sleep mode and stops sending frames for 10 minutes. The AP disassociates it with code 4.
- Application: Frees up airtime and resources for active devices, reducing congestion. The smartphone automatically reconnects when woken.
- Impact: Optimizes resource allocation in busy networks, improving performance for active users.
Code 5: Disassociated because AP is unable to handle all currently associated STAs
- Scenario: At a conference with 100+ devices connected to a single AP, the AP disassociates low-priority devices (e.g., IoT sensors) using code 5.
- Application: Ensures critical devices (e.g., presenter laptops) maintain connectivity. The AP may suggest alternative APs via 802.11v (BSS Transition Management).
- Impact: Enables load balancing in high-density environments, maintaining QoS for critical applications.
Code 8: Disassociated because sending STA is leaving (or has left) BSS
- Scenario: A user’s tablet roams from one AP to another in a university campus network. The original AP sends a disassociation frame with code 8.
- Application: Facilitates seamless roaming by informing the network of the client’s movement, ensuring the new AP takes over.
- Impact: Supports mobility in large networks, reducing connection drops during handoffs.
Code 13: Invalid information element
- Scenario: A misconfigured IoT device sends an association request with a malformed IE to a home Wi-Fi router, which responds with code 13.
- Application: The router logs the error, helping the user identify the need for a firmware update or configuration fix.
- Impact: Ensures protocol compliance, preventing network disruptions from faulty devices.

2. Security-Related Codes (Codes 2, 14–24)

These codes are used to enforce security policies and detect potential threats.

Code 14: Message integrity code (MIC) failure
- Scenario: In an enterprise network using WPA3, a client sends a frame with an incorrect MIC, possibly due to tampering or corruption. The AP deauthenticates with code 14.
- Application: The AP logs the event in a SIEM system, triggering an alert for potential security threats (e.g., a man-in-the-middle attack).
- Impact: Protects the network by isolating suspicious devices and enabling rapid response to security incidents.
Code 15: 4-way handshake timeout
- Scenario: A user’s laptop in a corporate network fails to complete the WPA2 4-way handshake due to a misconfigured pre-shared key (PSK). The AP sends code 15.
- Application: The network admin uses the log to identify the misconfiguration, advising the user to update their Wi-Fi settings.
- Impact: Ensures secure connections by rejecting clients with incorrect credentials or handshake issues.
Code 23: IEEE 802.1X authentication failed
- Scenario: In a university network using 802.1X with RADIUS, a student enters incorrect login credentials, triggering code 23 from the AP.
- Application: The RADIUS server logs the failure, and the network management system notifies the IT team, who assist the student with credential reset.
- Impact: Maintains security in enterprise environments by enforcing strict authentication.
Code 24: Cipher suite rejected because of the security policy
- Scenario: A legacy device attempts to connect to a modern AP using the deprecated TKIP cipher. The AP rejects it with code 24.
- Application: The AP’s log helps the administrator identify the need to upgrade or replace the legacy device to meet security standards.
- Impact: Enforces modern security protocols (e.g., AES-CCMP in WPA3), reducing vulnerabilities.

3. QoS and Resource Management Codes (Codes 10, 27–28, 47–50, 52–54)

These codes manage resources and enforce QoS policies in performance-critical networks.

Code 10: Disassociated because the information in the Power Capability element is unacceptable
- Scenario: A low-power IoT device connects to an AP in a regulated region (e.g., EU) but advertises a transmit power below the minimum required. The AP disassociates it with code 10.
- Application: Ensures compliance with regional regulations, preventing interference issues. The administrator adjusts the device’s settings or replaces it.
- Impact: Maintains network compliance and performance in regulated environments.
Code 48: Disassociated because the QoS AP or PCP lacks sufficient bandwidth for this QoS STA
- Scenario: In a hospital network, a medical device requiring guaranteed bandwidth for telemetry is disassociated with code 48 because the AP is congested.
- Application: The network management system logs the event, prompting the addition of more APs or bandwidth allocation adjustments.
- Impact: Prioritizes critical devices by managing limited bandwidth, ensuring QoS for life-critical applications.
Code 50: Disassociated because the STA is transmitting outside the limits of its TXOPs
- Scenario: In a video conferencing setup, a client sends excessive data outside its allocated TXOP, disrupting QoS. The AP disassociates it with code 50.
- Application: The AP logs the violation, and the administrator investigates the client’s QoS configuration or network interference.
- Impact: Enforces fair airtime allocation, maintaining low latency for real-time applications.

4. Mesh Networking Codes (Codes 25–26, 66–77)

These codes manage peering and routing in IEEE 802.11s mesh networks or TDLS sessions.

Code 25: TDLS direct-link teardown due to TDLS peer STA unreachable via the TDLS direct link
- Scenario: In a home mesh network, two smart TVs using TDLS for direct streaming lose connectivity due to one moving out of range. The session is torn down with code 25.
- Application: The mesh controller logs the event, allowing the system to revert to AP-based routing or inform the user to reposition the device.
- Impact: Maintains seamless media streaming by handling direct-link failures gracefully.
Code 67: Mesh maximum number of peers reached
- Scenario: In an IoT smart home network, a mesh node (e.g., a smart hub) rejects a new smart bulb’s peering request with code 67 due to reaching its peer limit.
- Application: The mesh controller logs the event, prompting the user to add another hub or reconfigure the network.
- Impact: Prevents mesh network overload, ensuring stable operation in dense IoT deployments.
Code 76: Mesh channel switch regulatory requirement
- Scenario: In an outdoor mesh network, a node switches channels to comply with local regulations (e.g., DFS requirements) and deauthenticates peers with code 76.
- Application: The network management system logs the channel switch, ensuring compliance and notifying peers to reconnect on the new channel.
- Impact: Ensures regulatory compliance while maintaining mesh connectivity.

Summary of Practical Impacts

Network Reliability: General disconnection codes (e.g., 4, 8) ensure efficient resource use and smooth roaming, reducing dropped connections.

Security: Security-related codes (e.g., 14, 15, 23) protect against attacks and enforce modern security standards, critical for enterprise and public networks.
Performance: QoS codes (e.g., 48, 50) optimize bandwidth and airtime, ensuring low latency for real-time applications like VoIP or streaming.
Scalability: Mesh codes (e.g., 67, 74) support dynamic, large-scale networks, enabling IoT and outdoor deployments.
Interoperability: Standardized codes ensure consistent behavior across vendors, simplifying multi-vendor deployments.

List of the standardized reason codes

Below is a comprehensive list of the standardized reason codes as defined in the IEEE 802.11-2020 standard, along with detailed explanations of their meanings and typical scenarios where they are used. The codes are listed in ascending order, as specified in Table 9-49 of the standard.

The IEEE 802.11-2020 standard Status codes

The IEEE 802.11-2020 standard, which governs Wi-Fi technology, defines a set of standardized status codes used in management frames to indicate the outcome of various operations, such as association, authentication, or other protocol exchanges between a station (STA) and an access point (AP) or between STAs in ad hoc or mesh networks. These status codes are distinct from the reason codes used in deauthentication and disassociation frames (covered in your previous queries) in that status codes provide feedback on the success or failure of a requested operation, whereas reason codes explain why an existing connection is terminated.

Overview of Status Codes in IEEE 802.11-2020

Status codes are 16-bit values included in the Status Code field of various IEEE 802.11 management frames, such as Association Response, Reassociation Response, Authentication, and Probe Response frames. They are defined in Section 9.4.1.9 (Status Code field) and listed in Table 9-50 of the IEEE 802.11-2020 standard. The codes indicate the outcome of a requested operation, such as whether an association attempt succeeded or failed, and if it failed, why. They are critical for:

Protocol Compliance: Ensuring devices follow the correct sequence of operations (e.g., authentication before association).
Interoperability: Allowing devices from different vendors to communicate operation outcomes consistently.
Troubleshooting: Providing detailed feedback for network administrators to diagnose issues.
Network Management: Enabling APs and STAs to make informed decisions, such as retrying a failed operation or switching to another AP.

Status codes are used in various contexts, including infrastructure networks (Extended Service Set, ESS), ad hoc networks (Independent Basic Service Set, IBSS), mesh networks (IEEE 802.11s), and Tunneled Direct Link Setup (TDLS). Unlike reason codes, which are specific to connection termination, status codes apply to a broader range of management frame exchanges, including successful operations.

Structure and Usage

Field Format: The Status Code field is a 2-byte (16-bit) unsigned integer included in the frame body of management frames like:
- Authentication frame (Section 9.3.3.12): Indicates the outcome of authentication attempts.
- Association Response frame (Section 9.3.3.6): Indicates the outcome of association requests.
- Reassociation Response frame (Section 9.3.3.8): Indicates the outcome of reassociation requests.
- Other frames: Such as Probe Response, Action frames, or mesh-specific frames (e.g., Mesh Peering Open/Confirm).
Protocol Flow: A typical Wi-Fi connection involves:
1. Authentication: The STA authenticates with the AP (e.g., Open System or Shared Key authentication).
2. Association/Reassociation: The STA requests to join the BSS or move to another AP.
3. Data Transfer: If successful, data exchange begins.
- Status codes are used in steps 1 and 2 to report the outcome of each request.
Values: The standard defines codes 0–122, with codes 123–65535 reserved for future use or vendor-specific purposes (typically above 200).

Categories of Status Codes

To provide a structured explanation, I’ll group the status codes into categories based on their purpose and context, similar to the approach used for reason codes. The categories are:

General Status Codes: Codes for successful operations or generic failures.
Authentication and Association Failures: Codes for issues related to authentication, association, or reassociation.
Security-Related Failures: Codes for security protocol violations or mismatches.
QoS and Resource-Related Failures: Codes for resource constraints or QoS issues.
Mesh Networking and TDLS Failures: Codes specific to IEEE 802.11s mesh networks or TDLS.
Reserved Codes: Codes not currently assigned.

Below, I list each status code, its description, technical context, and use cases, organized by category.

1. General Status Codes

These codes indicate successful operations or generic failures applicable across various management frame types.

Code 0: Success
- Context: The requested operation (e.g., authentication, association, or mesh peering) was successful.
- Frame Usage: Authentication, Association Response, Reassociation Response, Mesh Peering Open/Confirm, etc.
- Example: A laptop successfully associates with an AP, receiving code 0 in the Association Response frame.
Code 1: Unspecified failure
- Context: The operation failed for a reason not covered by specific codes, often implementation-specific.
- Frame Usage: Any management frame with a Status Code field.
- Example: An AP rejects an association request due to a proprietary policy (e.g., blacklisted MAC address).
Count: 2 codes.
Significance: Code 0 is critical for confirming successful operations, while code 1 provides a fallback for undefined failures.

2. Authentication and Association Failures

These codes address failures in authentication, association, or reassociation due to protocol violations or configuration issues.

Code 2: Association request rejected because the AP is unable to support all requested capabilities
- Context: The STA’s capabilities (e.g., data rates, channels) are not supported by the AP.
- Example: A legacy STA supporting only 802.11b is rejected by a 5 GHz-only AP.
Code 3: Association denied; the AP is unable to handle additional associated STAs
- Context: The AP is at capacity and cannot accept more STAs.
- Example: In a crowded airport Wi-Fi network, an AP rejects a new association request.
Code 4: Authentication rejected due to timeout waiting for the next frame in the sequence
- Context: The authentication process times out due to missing frames.
- Example: A client fails to respond during Open System authentication, causing a timeout.
Code 5: Authentication rejected because the STA does not support all of the data rates in the BSSBasicRateSet
- Context: The STA does not support mandatory data rates required by the AP.
- Example: An STA supports only 1 Mbps, but the AP requires 6 Mbps for 802.11g compatibility.
Code 10: Association denied because the STA does not support the Short Slot Time
- Context: The STA lacks support for Short Slot Time, a feature to reduce contention time in 802.11g/n.
- Example: A legacy 802.11b device is rejected by an 802.11n AP requiring Short Slot Time.
Code 11: Association denied because the STA does not support DSSS-OFDM
- Context: The STA lacks support for Direct Sequence Spread Spectrum with Orthogonal Frequency Division Multiplexing (DSSS-OFDM).
- Example: An older STA is rejected by an AP requiring DSSS-OFDM for mixed-mode operation.
Code 12: Authentication rejected because the requested authentication algorithm is not supported
- Context: The STA requests an unsupported authentication algorithm (e.g., Shared Key instead of Open System).
- Example: An STA attempts Shared Key authentication on an AP configured for Open System only.
Code 13: Authentication rejected because the sequence number in the authentication frame is out of expected sequence
- Context: The authentication frame’s sequence number is incorrect, indicating a protocol error or replay attack.
- Example: A misconfigured STA sends an out-of-sequence authentication frame.
Code 14: Authentication rejected because the challenge text in the authentication frame is incorrect
- Context: The STA fails the challenge-response in Shared Key authentication.
- Example: A client provides an incorrect response to the AP’s challenge in a WEP-based network.
Code 15: Authentication rejected due to timeout waiting for the challenge response
- Context: The STA does not respond to the authentication challenge within the timeout period.
- Example: A client delays too long during Shared Key authentication, causing a timeout.
Code 17: Association denied because the requesting STA is already associated
- Context: The STA is already associated with the AP and cannot re-associate.
- Example: A client sends multiple association requests without disassociating first.
Code 18: Association denied because the requesting STA does not support all of the data rates in the Supported Rates element
- Context: The STA does not support all mandatory rates advertised by the AP.
- Example: An STA supports only a subset of the AP’s required rates (e.g., missing 12 Mbps).
Code 19: Association denied because the requesting STA does not support the Short Preamble option
- Context: The STA lacks support for Short Preamble, a feature to reduce frame overhead.
- Example: A legacy STA is rejected by an AP requiring Short Preamble for efficiency.
Code 20: Association denied because the requesting STA does not support the PBCC modulation option
- Context: The STA lacks support for Packet Binary Convolutional Code (PBCC) modulation.
- Example: An older 802.11b STA is rejected by an AP requiring PBCC for compatibility.
Code 21: Association denied because the requesting STA does not support the Channel Agility option
- Context: The STA lacks support for Channel Agility, a feature for dynamic channel switching.
- Example: An STA is rejected by an AP requiring Channel Agility in a noisy environment.
Code 22: Association denied because the requesting STA does not support the Spectrum Management capability
- Context: The STA lacks support for spectrum management (e.g., 802.11h for DFS/TPC).
- Example: An STA is rejected in a 5 GHz network requiring Dynamic Frequency Selection (DFS).
Code 23: Association denied because the requesting STA does not support the QoS capability
- Context: The STA lacks support for 802.11e QoS features.
- Example: A legacy STA is rejected by a QoS-enabled AP in a multimedia network.
Code 24: Association denied because the requesting STA does not support the Immediate Block Ack capability
- Context: The STA lacks support for Immediate Block Acknowledgment, a feature for efficient frame acknowledgment.
- Example: An STA is rejected by an 802.11n AP requiring Block Ack for high throughput.
Code 25: Association denied because the AP is unable to support the channel width requested by the STA
- Context: The STA requests an unsupported channel width (e.g., 40 MHz in 802.11n).
- Example: An STA requesting 80 MHz is rejected by an AP limited to 20 MHz.
Code 26: Association denied because the requesting STA does not support the Short GI (Guard Interval) for the requested channel width
- Context: The STA lacks support for Short Guard Interval, a feature to increase data rates.
- Example: An 802.11n STA without Short GI support is rejected by a high-performance AP.
Code 27: Association denied because the requesting STA does not support the Short GI for the requested NSS (Number of Spatial Streams)
- Context: The STA lacks Short GI support for the requested spatial streams in MIMO.
- Example: An STA is rejected by an 802.11ac AP requiring Short GI for multiple spatial streams.
Code 28: Association denied because the requesting STA does not support the LDPC (Low-Density Parity Check) coding capability
- Context: The STA lacks support for LDPC, a coding scheme for error correction.
- Example: An 802.11ac STA without LDPC is rejected by an AP requiring it for reliability.
Code 29: Association denied because the requesting STA does not support the TxBF (Transmit Beamforming) capability
- Context: The STA lacks support for Transmit Beamforming, a feature for directional signal transmission.
- Example: An 802.11n/ac STA is rejected by an AP requiring TxBF for improved range.
Code 30: Association rejected due to excessive frame loss rates and/or poor conditions on the current operating channel
- Context: The AP rejects the association due to poor channel conditions or high frame loss.
- Example: An STA with a weak signal in a noisy environment is rejected to maintain network performance.
Code 34: Association denied because the requesting STA is temporarily barred due to excessive association attempts
- Context: The STA is temporarily blocked after too many failed association attempts.
- Example: A misconfigured client repeatedly attempts to associate, triggering a temporary ban.
Code 35: Authentication rejected because the requesting STA is not permitted to use the requested authentication method
- Context: The STA requests an authentication method not allowed by the AP’s policy.
- Example: An STA attempts 802.1X authentication on an AP configured for PSK only.
Code 36: Association denied because the requesting STA is not permitted to use the requested BSS
- Context: The STA is not authorized to join the specific BSS.
- Example: A guest device is rejected by an employee-only BSS in an enterprise network.
Code 37: Association denied because the requesting STA does not support the required data rates for the BSS
- Context: Similar to code 18 but broader, covering all required rates.
- Example: An STA missing a mandatory rate (e.g., 24 Mbps) is rejected.
Code 38: Association denied because the requesting STA does not support the required security capabilities
- Context: The STA lacks support for the AP’s security requirements (e.g., WPA3).
- Example: A WPA2-only STA is rejected by a WPA3-mandated AP.
Count: 29 codes.
Significance: These codes ensure protocol compliance and compatibility, rejecting STAs that cannot meet the AP’s requirements for authentication or association.

3. Security-Related Failures

These codes address failures due to security protocol mismatches or authentication issues, particularly for WPA2/WPA3 or 802.1X.

Code 6: Authentication rejected because the STA does not support the RSN (Robust Security Network) capability
- Context: The STA lacks support for RSN (e.g., WPA2/WPA3 security).
- Example: A legacy WEP-only device is rejected by a WPA3 AP.
Code 7: Authentication rejected because the RSN IE (Information Element) is invalid
- Context: The STA’s RSN IE contains invalid or incompatible data.
- Example: A misconfigured STA sends a malformed RSN IE during authentication.
Code 8: Authentication rejected because the pairwise cipher suite is not supported
- Context: The STA requests an unsupported pairwise cipher (e.g., TKIP).
- Example: An STA proposing TKIP is rejected by an AES-only AP.
Code 9: Authentication rejected because the group cipher suite is not supported
- Context: The STA requests an unsupported group cipher for broadcast/multicast traffic.
- Example: An STA requesting a deprecated group cipher is rejected.
Code 16: Authentication rejected because the STA does not support the AKM (Authentication and Key Management) suite
- Context: The STA requests an unsupported AKM (e.g., PSK vs. 802.1X).
- Example: An STA attempts PSK authentication on an 802.1X-only AP.
Code 39: Authentication rejected because the STA does not support the SAE (Simultaneous Authentication of Equals) hash-to-element method
- Context: The STA lacks support for SAE, used in WPA3-Personal.
- Example: A WPA2 STA is rejected by a WPA3 AP requiring SAE.
Code 40: Authentication rejected because the STA does not support the SAE hunting-and-pecking method
- Context: The STA lacks support for the SAE hunting-and-pecking algorithm.
- Example: A client without SAE support is rejected by a WPA3 AP.
Code 41: Authentication rejected because the STA does not support the FT (Fast BSS Transition) capability
- Context: The STA lacks support for 802.11r Fast BSS Transition for seamless roaming.
- Example: An STA without FT support is rejected by an AP requiring fast roaming.
Code 42: Authentication rejected because the STA does not support the MDE (Mobility Domain Element)
- Context: The STA lacks support for the Mobility Domain IE, used in 802.11r.
- Example: A non-802.11r STA is rejected by an AP in a mobility domain.
Code 43: Authentication rejected because the STA does not support the FTE (Fast Transition Element)
- Context: The STA lacks support for the Fast Transition IE, used in 802.11r.
- Example: A client is rejected by an AP requiring FT for secure roaming.
Code 44: Authentication rejected because the STA does not support the TIE (Timeout Interval Element)
- Context: The STA lacks support for the Timeout Interval IE, used in 802.11r.
- Example: An STA is rejected by an AP enforcing FT timeout policies.
Code 45: Authentication rejected because the STA does not support the PMK-R0 (Pairwise Master Key R0)
- Context: The STA lacks support for PMK-R0, used in 802.11r for fast roaming.
- Example: A non-FT STA is rejected by an AP requiring PMK-R0 caching.
Code 46: Authentication rejected because the STA does not support the PMK-R1 (Pairwise Master Key R1)
- Context: Similar to code 45, for PMK-R1 in 802.11r.
- Example: A client without PMK-R1 support is rejected by a roaming-enabled AP.
Code 47: Authentication rejected because the STA does not support the FT Resource Request
- Context: The STA lacks support for FT resource requests in 802.11r.
- Example: An STA is rejected by an AP requiring resource allocation for FT.
Code 48: Authentication rejected because the STA does not support the requested authentication algorithm suite
- Context: The STA requests an unsupported authentication suite (e.g., SAE vs. PSK).
- Example: A client requesting an outdated authentication suite is rejected.
Code 49: Authentication rejected because the STA does not support the requested authentication algorithm parameters
- Context: The STA’s authentication parameters are incompatible.
- Example: A client with incorrect SAE parameters is rejected by a WPA3 AP.
Code 50: Authentication rejected because the STA does not support the requested authentication algorithm version
- Context: The STA’s authentication algorithm version is unsupported.
- Example: A client with an obsolete WPA version is rejected.
Count: 17 codes.
Significance: These codes enforce modern security standards, ensuring compatibility with WPA2/WPA3 and fast roaming protocols.

4. QoS and Resource-Related Failures

These codes address failures due to resource constraints or QoS incompatibilities.

Code 31: Association denied because the requested QoS parameters cannot be supported
- Context: The AP cannot meet the STA’s QoS requirements (e.g., bandwidth, latency).
- Example: A VoIP device requesting specific QoS parameters is rejected by a congested AP.
Code 32: Association denied because the requested TSPEC (Traffic Specification) cannot be supported
- Context: The STA’s TSPEC (e.g., for 802.11e QoS) is unsupported.
- Example: A video streaming device requesting a TSPEC is rejected due to insufficient bandwidth.
Code 33: Association denied because the requested TSPEC is not acceptable
- Context: The STA’s TSPEC is valid but not acceptable to the AP’s policy.
- Example: An STA’s TSPEC exceeds the AP’s QoS limits.
Code 51: Association denied because the requested EDCA (Enhanced Distributed Channel Access) parameters are not supported
- Context: The STA’s EDCA parameters (for QoS prioritization) are unsupported.
- Example: A client requesting custom EDCA settings is rejected by a standard AP.
Count: 4 codes.
Significance: These codes ensure QoS compliance and resource availability, critical for multimedia and real-time applications.

5. Mesh Networking and TDLS Failures

These codes are specific to IEEE 802.11s mesh networks and TDLS.

Code 52: Mesh peering request rejected because the mesh STA is unable to support the requested mesh peering
- Context: The mesh STA cannot support the requested peering configuration.
- Example: A mesh node rejects a peering request due to incompatible parameters.
Code 53: Mesh peering request rejected because the mesh STA has reached its maximum number of peers
- Context: The mesh STA has reached its peer limit.
- Example: A smart home hub rejects a new device’s peering request.
Code 54: Mesh peering request rejected because the mesh STA is temporarily barred due to excessive peering attempts
- Context: The mesh STA blocks a peer after too many failed attempts.
- Example: A misconfigured mesh node is temporarily barred.
Code 55: Mesh peering request rejected because the mesh STA does not support the requested security capabilities
- Context: The mesh STA lacks support for the requested security features.
- Example: A mesh node without WPA3 support is rejected.
Code 56: Mesh peering request rejected because the mesh STA does not support the requested mesh formation parameters
- Context: The mesh STA’s formation parameters (e.g., routing protocol) are incompatible.
- Example: A mesh node rejects a peer with an unsupported routing protocol.
Code 57: Mesh peering request rejected because the mesh STA does not support the requested mesh path selection protocol
- Context: The mesh STA lacks support for the requested path selection protocol (e.g., HWMP).
- Example: A mesh node rejects a peer using an incompatible path selection protocol.
Code 58: Mesh peering request rejected because the mesh STA does not support the requested mesh path metric
- Context: The mesh STA lacks support for the requested path metric (e.g., airtime link metric).
- Example: A mesh node rejects a peer with an unsupported metric.
Code 59: Mesh peering request rejected because the mesh STA does not support the requested congestion control mode
- Context: The mesh STA lacks support for the requested congestion control mechanism.
- Example: A mesh node rejects a peer with an incompatible congestion control setting.
Code 60: Mesh peering request rejected because the mesh STA does not support the requested synchronization method
- Context: The mesh STA lacks support for the requested synchronization method.
- Example: A mesh node rejects a peer with an unsupported timing synchronization.
Code 61: Mesh peering request rejected because the mesh STA does not support the requested authentication protocol
- Context: The mesh STA lacks support for the requested authentication protocol.
- Example: A mesh node rejects a peer using an unsupported authentication method.
Code 62: TDLS direct-link setup request rejected because the STA does not support TDLS
- Context: The STA does not support TDLS for direct STA-to-STA communication.
- Example: A TV rejects a TDLS request from another device for direct streaming.
Code 63: TDLS direct-link setup request rejected because the STA is unable to support the requested TDLS parameters
- Context: The STA’s TDLS parameters are unsupported.
- Example: A device rejects a TDLS request due to incompatible security settings.
Count: 12 codes.
Significance: These codes support dynamic mesh networks and TDLS, critical for IoT and direct-link applications.

6. Reserved Codes

Codes: 64–122, 123–65535
Description: These codes are not assigned and are reserved for future standardization or vendor-specific use (typically above 200).
Context: Ensures the standard can accommodate new features or proprietary implementations.
Example: A vendor might use code 200 for a custom rejection reason.
Count: 59 explicitly listed codes (64–122), plus 123–65535.
Significance: Provides flexibility for future Wi-Fi amendments and vendor innovation.

Practical Applications of IEEE 802.11-2020 Status Codes

Status codes serve multiple practical purposes in Wi-Fi network operations, enabling administrators, devices, and network management systems to handle connectivity issues, enforce policies, and optimize performance. Below are the key applications, followed by specific examples organized by the previously defined categories: General Status Codes, Authentication and Association Failures, Security-Related Failures, QoS and Resource-Related Failures, and Mesh Networking and TDLS Failures. Reserved codes (64–122, 123–65535) are excluded from examples, as they are not currently used in practice.

Troubleshooting and Diagnostics:
- Purpose: Status codes provide detailed feedback on why an operation (e.g., association or authentication) failed, helping administrators identify configuration errors, compatibility issues, or environmental problems.
- Use Case: Logs containing status codes are analyzed using tools like Wireshark or network management platforms (e.g., Cisco Meraki, Ubiquiti UniFi) to diagnose connectivity issues.
- Impact: Speeds up resolution of client connection problems, reducing downtime.
Security Enforcement and Monitoring:
- Purpose: Security-related status codes ensure compliance with security protocols (e.g., WPA3, 802.1X) and detect potential issues like misconfigured devices or unauthorized access attempts.
- Use Case: Codes like 6 (unsupported RSN) or 39 (unsupported SAE) trigger alerts in Security Information and Event Management (SIEM) systems, prompting investigation.
- Impact: Protects networks from vulnerabilities and ensures secure connections.
Resource Management and Load Balancing:
- Purpose: Codes related to resource constraints (e.g., AP capacity, QoS limits) allow APs to manage limited resources in high-density environments.
- Use Case: Codes like 3 (AP at capacity) or 31 (unsupported QoS parameters) help APs reject or redirect clients to maintain performance.
- Impact: Optimizes network performance in crowded settings like stadiums or offices.
Client Roaming and Mobility:
- Purpose: Status codes support seamless roaming by rejecting incompatible clients or guiding them to other APs, especially in 802.11r (Fast BSS Transition) scenarios.
- Use Case: Codes like 41–47 (FT-related failures) ensure clients support fast roaming, reducing latency during handoffs.
- Impact: Enhances user experience in mobile environments like campuses or warehouses.
Mesh Network Management:
- Purpose: Mesh-specific codes manage peering and routing in IEEE 802.11s networks, ensuring robust connectivity in dynamic topologies.
- Use Case: Codes like 53 (max peers reached) or 57 (unsupported path selection) maintain stable mesh networks in IoT or outdoor deployments.
- Impact: Supports scalable, self-configuring networks for smart homes or large-scale applications.
Interoperability and Standards Compliance:
- Purpose: Standardized codes ensure devices from different vendors (e.g., Intel, Qualcomm, Cisco) interpret operation outcomes consistently.
- Use Case: A client device from one vendor correctly handles a rejection from another vendor’s AP, ensuring predictable behavior.
- Impact: Simplifies multi-vendor deployments and Wi-Fi Alliance certifications.
Network Optimization and Policy Enforcement:
- Purpose: Codes allow APs to enforce policies like mandatory data rates, QoS settings, or security protocols.
- Use Case: Codes like 38 (unsupported security capabilities) or 25 (unsupported channel width) enforce network requirements.
- Impact: Maintains network efficiency and compliance with operational standards.

Examples of the use of Reason Codes

Below, I provide real-world examples for each category of status codes, illustrating their use in practical scenarios. Each example includes the context, the specific status code, and its impact on network management. The examples are drawn from common Wi-Fi environments, such as enterprise networks, public hotspots, home networks, and IoT deployments.

1. General Status Codes (Codes 0, 1)

These codes indicate successful operations or generic failures.

Code 0: Success
- Scenario: In a home Wi-Fi network, a smartphone sends an Association Request to the AP (e.g., a Netgear router). The AP responds with an Association Response frame containing status code 0, indicating successful association.
- Application: The smartphone begins data transfer (e.g., streaming a video). The network management system logs the successful association for performance monitoring.
- Impact: Confirms seamless connectivity, ensuring a smooth user experience. Network admins can verify successful connections via logs.
Code 1: Unspecified failure
- Scenario: In a public Wi-Fi hotspot at a café, a laptop’s association request is rejected with code 1 due to a proprietary policy (e.g., the AP blocks devices with unrecognized MAC addresses).
- Application: The laptop displays a generic connection error, prompting the user to contact support or try another network. The AP logs the event for the admin to review.
- Impact: Allows APs to enforce custom policies without disclosing details, maintaining security and flexibility.

2. Authentication and Association Failures (Codes 2–5, 10–15, 17–30, 34–38)

These codes handle failures due to protocol violations or compatibility issues during authentication and association.

Code 3: Association denied; the AP is unable to handle additional associated STAs
- Scenario: At a music festival with hundreds of devices, an AP rejects a new smartphone’s association request with code 3 due to reaching its maximum client capacity (e.g., 100 STAs).
- Application: The smartphone attempts to connect to another AP, and the network management system alerts the admin to deploy additional APs or enable load balancing (e.g., via 802.11v).
- Impact: Prevents network congestion, ensuring performance for already-connected devices.
Code 12: Authentication rejected because the requested authentication algorithm is not supported
- Scenario: In an enterprise network, a legacy IoT device attempts Shared Key authentication (e.g., WEP) on an AP configured for Open System authentication, receiving code 12.
- Application: The network admin identifies the device as outdated via logs and replaces it or sets up a separate legacy BSS.
- Impact: Enforces modern authentication standards, reducing security risks from deprecated protocols.
Code 30: Association rejected due to excessive frame loss rates and/or poor conditions on the current operating channel
- Scenario: In a factory with heavy interference (e.g., from machinery), an STA’s association request is rejected with code 30 due to a weak signal and high frame loss.
- Application: The STA retries on another channel or AP, and the admin uses the log to investigate interference or adjust channel settings (e.g., using 802.11h DFS).
- Impact: Maintains network reliability by rejecting clients with poor connectivity, reducing retransmissions.
Code 38: Association denied because the requesting STA does not support the required security capabilities
- Scenario: In a corporate network requiring WPA3, a WPA2-only laptop is rejected with code 38 during association.
- Application: The admin updates the laptop’s firmware to support WPA3 or directs it to a guest network with WPA2.
- Impact: Ensures compliance with modern security standards, protecting the network from vulnerabilities.

3. Security-Related Failures (Codes 6–9, 16, 39–50)

These codes enforce security protocols and detect issues like misconfigured clients or unsupported security features.

Code 6: Authentication rejected because the STA does not support the RSN capability
- Scenario: In a secure office network, a legacy IoT sensor supporting only WEP attempts to authenticate with a WPA3 AP and is rejected with code 6.
- Application: The network management system logs the failure, and the admin replaces the sensor or configures a separate legacy network.
- Impact: Prevents insecure devices from joining, maintaining network security.
Code 39: Authentication rejected because the STA does not support the SAE hash-to-element method
- Scenario: In a WPA3-Personal home network, a budget smartphone without SAE support attempts authentication and is rejected with code 39.
- Application: The user is prompted to update the device’s firmware or use a WPA2 fallback SSID. The router logs the event for troubleshooting.
- Impact: Enforces WPA3 security, ensuring robust encryption for modern devices.
Code 41: Authentication rejected because the STA does not support the FT capability
- Scenario: In a university campus with 802.11r-enabled APs for fast roaming, a client without Fast BSS Transition support is rejected with code 41.
- Application: The client connects to a non-FT AP, and the admin notes the need for FT-compatible devices for seamless roaming.
- Impact: Ensures fast roaming performance in mobile environments, reducing connection latency.

4. QoS and Resource-Related Failures (Codes 31–33, 51)

These codes manage bandwidth and QoS requirements, ensuring performance for critical applications.

Code 31: Association denied because the requested QoS parameters cannot be supported
- Scenario: In a hospital Wi-Fi network, a medical telemetry device requests specific QoS parameters (e.g., low latency) for real-time monitoring, but the AP rejects it with code 31 due to insufficient bandwidth.
- Application: The device falls back to best-effort traffic, and the admin reallocates bandwidth or adds APs to support critical devices.
- Impact: Prioritizes resources for life-critical applications, maintaining QoS in congested networks.
Code 32: Association denied because the requested TSPEC cannot be supported
- Scenario: In a conference room, a video conferencing system requests a TSPEC for guaranteed bandwidth, but the AP rejects it with code 32 due to resource constraints.
- Application: The system uses best-effort traffic, and the admin monitors QoS logs to optimize bandwidth allocation.
- Impact: Ensures fair resource distribution, preventing QoS overload in multimedia networks.

5. Mesh Networking and TDLS Failures (Codes 52–63)

These codes manage peering and direct-link operations in mesh networks and TDLS scenarios.

Code 53: Mesh peering request rejected because the mesh STA has reached its maximum number of peers
- Scenario: In a smart home mesh network, a smart hub rejects a new smart bulb’s peering request with code 53 due to reaching its maximum peer limit (e.g., 32 devices).
- Application: The user is notified to add another hub, and the mesh controller logs the event for network expansion planning.
- Impact: Prevents mesh network overload, ensuring stable operation in IoT deployments.
Code 62: TDLS direct-link setup request rejected because the STA does not support TDLS
- Scenario: In a home network, a gaming console attempts a TDLS direct-link setup with a smart TV for low-latency streaming but is rejected with code 62 because the TV lacks TDLS support.
- Application: The console routes traffic through the AP, and the user is informed to check device compatibility or update firmware.
- Impact: Maintains connectivity by falling back to AP-based routing, ensuring uninterrupted streaming.

Comprehensive List of IEEE 802.11-2020 Status Codes

The table below lists all status codes (0–122) as defined in Table 9-50 of the IEEE 802.11-2020 standard. Codes 123–65535 are reserved for future use or vendor-specific purposes and are summarized at the end. Each entry includes:

Code: The 16-bit status code value.
Description: The standardized description from the IEEE 802.11-2020 standard.
Context of Use: The scenarios or frame types where the code is typically used (e.g., Authentication, Association Response).
Notes: Additional details, such as the feature or amendment introducing the code, practical implications, or related standards.

Logging and Analytics for Status and Reason Codes in Wi-Fi Networks

Logging involves capturing and storing the status codes (indicating the outcome of operations like authentication or association) and reason codes (explaining why a connection was terminated) from management frames exchanged between STAs (stations, e.g., client devices like smartphones or laptops) and APs. These codes are stored in log files or databases, often with additional metadata like timestamps, client MAC addresses, signal strength (RSSI), and frame types.

Analytics refers to the processing and analysis of these logs to extract meaningful insights, such as identifying connectivity issues, detecting security threats, optimizing resource allocation, or predicting network bottlenecks. Modern APs and NMS, such as Cisco Meraki, Ubiquiti UniFi, Aruba Central, or Ruckus SmartZone, integrate logging and analytics to provide real-time and historical views of network activity, enabling proactive management and troubleshooting.

The IEEE 802.11-2020 standard defines:

Status Codes (Table 9-50): Used in Authentication, Association Response, Reassociation Response, and other frames union frames to indicate the success or failure of operations (e.g., code 0 for success, code 38 for unsupported security capabilities).
Reason Codes (Table 9-49): Used in Deauthentication and Disassociation frames to indicate why a connection was terminated (e.g., code 15 for 4-way handshake timeout, code 4 for inactivity).

These codes are critical data points for logging and analytics, as they provide specific, standardized reasons for connection outcomes, enabling precise diagnosis and optimization.

Practical Applications of Logging and Analytics for Status and Reason Codes

Logging and analytics of status and reason codes serve several practical purposes in Wi-Fi network management. Below, I outline the key applications, followed by detailed examples illustrating how these codes are used in real-world scenarios.

Troubleshooting Connectivity Issues:
- Purpose: Status and reason codes help identify why clients fail to connect or are disconnected, enabling administrators to pinpoint root causes (e.g., configuration errors, compatibility issues, or environmental factors).
- Use Case: Frequent status code 30 (association rejected due to excessive frame loss) in logs indicates poor channel conditions, prompting channel optimization.
- Tools: Protocol analyzers (e.g., Wireshark), AP dashboards, or NMS like Cisco DNA Center.
Security Monitoring and Threat Detection:
- Purpose: Security-related codes (e.g., status code 6 for unsupported RSN, reason code 14 for MIC failure) flag potential security threats or misconfigurations, triggering alerts for investigation.
- Use Case: Reason code 14 (MIC failure) in logs may indicate a man-in-the-middle attack, prompting a security audit.
- Tools: SIEM systems (e.g., Splunk, ArcSight), AP security logs, or cloud-based NMS like Aruba Central.
Resource Management and Load Balancing:
- Purpose: Codes like status code 3 (AP at capacity) or reason code 5 (AP unable to handle associated STAs) help manage network resources in high-density environments.
- Use Case: Status code 3 in logs triggers load balancing or additional AP deployment in crowded networks.
- Tools: Enterprise-grade APs with load balancing (e.g., Ruckus, Cisco), NMS with capacity analytics.
Performance Optimization:
- Purpose: Analyzing patterns in status and reason codes identifies bottlenecks, such as frequent QoS-related failures (e.g., status code 31 for unsupported QoS parameters), enabling bandwidth or channel adjustments.
- Use Case: Reason code 48 (insufficient QoS bandwidth) in logs prompts QoS policy tuning or bandwidth allocation.
- Tools: NMS with performance dashboards (e.g., Ubiquiti UniFi Network Management Controller, SolarWinds).
Client Behavior Analysis:
- Purpose: Codes reveal client behavior trends, such as frequent roaming (reason code 8) or authentication failures (status code 12), aiding device compatibility or user education efforts.
- Use Case: Repeated status code 38 (unsupported security capabilities) indicates the need for client firmware updates.
- Tools: Client profiling in NMS, log aggregation platforms.
Mesh Network Management:
- Purpose: Mesh-specific codes (e.g., status code 53 for max peers reached, reason code 67 for same) ensure stable operation in dynamic IEEE 802.11s mesh networks.
- Use Case: Status code 53 in logs prompts adding mesh nodes to expand capacity.
- Tools: Mesh network controllers (e.g., Eero, Zigbee, or proprietary IoT platforms).
Regulatory and Policy Compliance:
- Purpose: Codes like status code 22 (unsupported spectrum management) or reason code 76 (mesh channel switch regulatory requirement) ensure compliance with local regulations.
- Use Case: Reason code 76 in logs triggers channel switch verification for DFS compliance.
- Tools: Regulatory compliance modules in NMS, spectrum analyzers.

How Logging and Analytics Work

Log Capture:
- Mechanism: APs capture status and reason codes from management frames (e.g., Association Response, Deauthentication) and store them in local or cloud-based logs.
- Metadata: Logs include details like:
  - Timestamp (e.g., 2025-07-28 19:59:00 IST).
  - Client MAC address (e.g., 00:1A:2B:3C:4D:5E).
  - Signal strength (RSSI, e.g., -70 dBm).
  - Frame type (e.g., Association Response, Deauthentication).
  - Code value (e.g., status code 0, reason code 15).
- Storage: Logs are stored in AP memory, syslog servers, or cloud-based NMS databases (e.g., Cisco Meraki Cloud).
Log Transmission:
- Local: APs maintain logs in internal storage, accessible via SSH or web interfaces.
- Centralized: Logs are forwarded to an NMS or syslog server using protocols like Syslog, SNMP, or proprietary APIs.
- Cloud-Based: Modern systems (e.g., Aruba Central, UniFi Cloud) upload logs to the cloud for real-time analysis.
Analytics Processing:
- Aggregation: Logs are aggregated across multiple APs to provide a network-wide view.
- Filtering: NMS filters logs by code, client, time, or event type to identify patterns (e.g., frequent status code 15 for 4-way handshake timeouts).
- Visualization: Dashboards display metrics like connection success rates, failure reasons, or client distribution.
- Machine Learning: Advanced NMS (e.g., Cisco DNA Center) use AI to predict issues based on code patterns (e.g., predicting congestion from status code 3).
Actionable Insights:
- Alerts: Real-time alerts for critical codes (e.g., reason code 14 for MIC failure).
- Reports: Historical reports on code frequency, client issues, or network health.
- Automation: NMS can trigger actions like channel switches or client redirects based on code analysis.

Examples of Logging and Analytics with Status and Reason Codes

Below, I provide real-world examples for each category of status and reason codes, illustrating how modern APs and NMS log and analyze these codes to manage Wi-Fi networks effectively. Each example includes the scenario, the code logged, how it’s captured and analyzed, and the resulting action.

1. General Status Codes (Status Codes 0, 1)

Status Code 0: Success
- Scenario: In a corporate office, a laptop successfully authenticates and associates with an AP (e.g., Cisco Catalyst 9100). The Association Response frame contains status code 0.
- Logging: The AP logs the event with details: 2025-07-28 19:59:00 IST, MAC: 00:1A:2B:3C:4D:5E, RSSI: -65 dBm, Frame: Association Response, Status Code: 0.
- Analytics: Cisco DNA Center aggregates successful associations, showing a 98% success rate across 500 clients, indicating stable network performance.
- Action: The admin confirms the network is operating normally, using the high success rate to validate recent AP upgrades.
- Impact: Ensures user connectivity and provides baseline metrics for performance monitoring.
Status Code 1: Unspecified failure
- Scenario: In a public Wi-Fi hotspot, a tablet’s association request is rejected with status code 1 due to a proprietary AP policy (e.g., Aruba AP blocking devices not on an approved list).
- Logging: The AP logs: 2025-07-28 19:59:10 IST, MAC: 00:1A:2B:3C:4D:5F, RSSI: -70 dBm, Frame: Association Response, Status Code: 1.
- Analytics: Aruba Central’s dashboard shows 10% of association attempts failed with code 1, indicating potential unauthorized devices or policy misconfigurations.
- Action: The admin reviews the MAC address list and updates the allowlist or notifies users to register their devices.
- Impact: Maintains security by enforcing access control while identifying policy issues.

2. Authentication and Association Failures (Status Codes 2–5, 10–15, 17–30, 34–38)

Status Code 3: Association denied; the AP is unable to handle additional associated STAs
- Scenario: At a sports stadium, a Ruckus AP rejects a smartphone’s association request with status code 3 due to reaching its 128-client limit.
- Logging: The AP logs: 2025-07-28 19:59:20 IST, MAC: 00:1A:2B:3C:4D:60, RSSI: -75 dBm, Frame: Association Response, Status Code: 3.
- Analytics: Ruckus SmartZone shows 30% of association attempts fail with code 3 during peak event hours, indicating capacity issues.
- Action: The admin deploys additional APs or enables 802.11v BSS Transition Management to redirect clients to underutilized APs.
- Impact: Reduces network congestion, improving connectivity for attendees.
Status Code 38: Association denied because the requesting STA does not support the required security capabilities
- Scenario: In a university network, a WPA2-only laptop attempts to join a WPA3-only SSID and is rejected with status code 38.
- Logging: The AP logs: 2025-07-28 19:59:30 IST, MAC: 00:1A:2B:3C:4D:61, RSSI: -68 dBm, Frame: Association Response, Status Code: 38.
- Analytics: Ubiquiti UniFi Controller identifies 15 devices failing with code 38, indicating a need for client upgrades.
- Action: The IT team pushes firmware updates to support WPA3 or configures a WPA2 fallback SSID for legacy devices.
- Impact: Ensures security compliance while accommodating legacy devices.
Reason Code 4: Disassociated due to inactivity
- Scenario: In an office, an employee’s tablet stops transmitting for 15 minutes, and the AP disassociates it with reason code 4.
- Logging: The AP logs: 2025-07-28 19:59:40 IST, MAC: 00:1A:2B:3C:4D:62, RSSI: -80 dBm, Frame: Disassociation, Reason Code: 4.
- Analytics: Cisco Meraki shows 20% of clients are disassociated with code 4 during lunch hours, indicating normal behavior for devices in sleep mode.
- Action: The admin adjusts the inactivity timeout to balance resource usage and user experience.
- Impact: Frees up airtime for active devices, optimizing network performance.

3. Security-Related Failures (Status Codes 6–9, 16, 39–50; Reason Codes 2, 14–24)

Status Code 6: Authentication rejected because the STA does not support the RSN capability
- Scenario: In a secure government network, a legacy IoT device supporting only WEP attempts authentication and is rejected with status code 6.
- Logging: The AP logs: 2025-07-28 19:59:50 IST, MAC: 00:1A:2B:3C:4D:63, RSSI: -72 dBm, Frame: Authentication, Status Code: 6.
- Analytics: Aruba Central’s security dashboard flags 5 devices with code 6, indicating outdated clients.
- Action: The security team removes or upgrades the devices to comply with WPA3 requirements.
- Impact: Prevents insecure devices from compromising network security.
Reason Code 14: Message integrity code (MIC) failure
- Scenario: In an enterprise network, a client sends a frame with an incorrect MIC, triggering deauthentication with reason code 14.
- Logging: The AP logs: 2025-07-28 20:00:00 IST, MAC: 00:1A:2B:3C:4D:64, RSSI: -70 dBm, Frame: Deauthentication, Reason Code: 14.
- Analytics: A SIEM system (e.g., Splunk) correlates multiple code 14 events, suggesting a potential man-in-the-middle attack.
- Action: The security team investigates the client for tampering, enables additional encryption checks, and monitors for further anomalies.
- Impact: Mitigates security threats, ensuring data integrity.
Status Code 41: Authentication rejected because the STA does not support the FT capability
- Scenario: In a campus network with 802.11r enabled for fast roaming, a client without FT support is rejected with status code 41.
- Logging: The AP logs: 2025-07-28 20:00:10 IST, MAC: 00:1A:2B:3C:4D:65, RSSI: -67 dBm, Frame: Authentication, Status Code: 41.
- Analytics: Cisco DNA Center shows 10% of clients fail with code 41, indicating a mix of FT and non-FT devices.
- Action: The admin enables a non-FT SSID for compatibility or pushes FT firmware updates to clients.
- Impact: Ensures seamless roaming for FT-capable devices while accommodating legacy clients.

4. QoS and Resource-Related Failures (Status Codes 31–33, 51; Reason Codes 10, 27–28, 47–50, 52–54)

Status Code 31: Association denied because the requested QoS parameters cannot be supported
- Scenario: In a hospital network, a medical device requests QoS parameters for low-latency telemetry, but the AP rejects it with status code 31 due to bandwidth constraints.
- Logging: The AP logs: 2025-07-28 20:00:20 IST, MAC: 00:1A:2B:3C:4D:66, RSSI: -69 dBm, Frame: Association Response, Status Code: 31.
- Analytics: Aruba Central’s QoS dashboard shows 5% of devices fail with code 31 during peak hours, indicating bandwidth shortages.
- Action: The admin prioritizes QoS for critical devices or adds APs to increase capacity.
- Impact: Ensures reliable performance for life-critical applications.
Reason Code 48: Disassociated because the QoS AP lacks sufficient bandwidth for this QoS STA
- Scenario: In a conference center, a video streaming device is disassociated with reason code 48 due to insufficient bandwidth for its QoS requirements.
- Logging: The AP logs: 2025-07-28 20:00:30 IST, MAC: 00:1A:2B:3C:4D:67, RSSI: -73 dBm, Frame: Disassociation, Reason Code: 48.
- Analytics: Ruckus SmartZone identifies frequent code 48 events during presentations, signaling network congestion.
- Action: The admin adjusts QoS policies to prioritize streaming or enables band steering to 5 GHz.
- Impact: Optimizes bandwidth allocation for multimedia applications.

5. Mesh Networking and TDLS Failures (Status Codes 52–63; Reason Codes 25–26, 66–77)

Status Code 53: Mesh peering request rejected because the mesh STA has reached its maximum number of peers
- Scenario: In a smart home mesh network, a smart hub (e.g., Eero) rejects a new smart bulb’s peering request with status code 53 due to a 32-device limit.
- Logging: The hub logs: 2025-07-28 20:00:40 IST, MAC: 00:1A:2B:3C:4D:68, RSSI: -71 dBm, Frame: Mesh Peering Open, Status Code: 53.
- Analytics: The Eero app shows 10% of peering attempts fail with code 53, indicating capacity limits.
- Action: The user adds another hub to expand the mesh network, guided by the app’s recommendations.
- Impact: Scales the mesh network to support more IoT devices.
Reason Code 67: Mesh maximum number of peers reached
- Scenario: In an outdoor mesh network for a smart city, a node rejects a new sensor’s peering with reason code 67 due to reaching its peer limit.
- Logging: The node logs: 2025-07-28 20:00:50 IST, MAC: 00:1A:2B:3C:4D:69, RSSI: -74 dBm, Frame: Deauthentication, Reason Code: 67.
- Analytics: The mesh controller identifies code 67 as a recurring issue in dense areas, suggesting topology adjustments.
- Action: The admin adds new nodes or reconfigures peering limits.
- Impact: Ensures robust mesh connectivity in large-scale deployments.

Technical Implementation

AP Logging: APs use embedded software (e.g., Cisco IOS-XE, ArubaOS) to capture codes and store them in memory or forward them to syslog servers.
NMS Integration: Systems like Cisco Meraki, Aruba Central, or Ubiquiti UniFi aggregate logs via APIs or SNMP, providing dashboards with filters for code, client, or time.
Analytics Features:
- Real-Time Monitoring: Dashboards show live code occurrences (e.g., 10 code 15 events in the last hour).
- Historical Analysis: Reports summarize code frequency over days or weeks.
- Predictive Analytics: AI-driven NMS (e.g., Cisco DNA Center) predict issues like congestion based on code patterns.
Storage and Scalability: Cloud-based NMS store logs in databases (e.g., Elasticsearch), supporting large networks with thousands of clients.
Security: Logs are encrypted during transmission (e.g., TLS) to prevent tampering.

use Wireshark to log the Reson codes

To use Wireshark to log IEEE 802.11-2020 standardized reason codes, which are included in Wi-Fi management frames (specifically Deauthentication and Disassociation frames) to indicate why a connection was terminated, you need to capture Wi-Fi traffic, filter for the relevant frames, and extract the reason codes from the frame details.

Overview of Reason Codes and Wireshark

Reason codes are 16-bit values in the Reason Code field of Deauthentication and Disassociation frames, indicating why a station (STA, e.g., a client device) or access point (AP) terminated a connection (e.g., code 4 for inactivity, code 15 for 4-way handshake timeout). These frames are part of the IEEE 802.11 management frame subtype, and Wireshark can decode them to display the reason code and its description (if supported by its protocol dissector).

Wireshark’s Role: Wireshark captures Wi-Fi packets in monitor mode, decodes the IEEE 802.11 frame structure, and displays the Reason Code field in a human-readable format. To log reason codes, you’ll:

Configure your network interface for monitor mode.
Capture Wi-Fi traffic.
Filter for Deauthentication and Disassociation frames.
Extract and log reason codes.
Analyze or export the results for further investigation.

Step-by-Step Guide to Logging Reason Codes with Wireshark

Below is a detailed guide to using Wireshark to log reason codes, with explanations and practical considerations for each step.

Step 1: Prerequisites and Setup

Before capturing Wi-Fi traffic, ensure your environment is ready.

Install Wireshark:
- Download and install the latest stable version of Wireshark from wireshark.org.
- Install on a supported OS (Windows, macOS, or Linux). Linux is preferred for advanced Wi-Fi capture due to better driver support.
- Ensure Npcap (Windows) or libpcap (Linux/macOS) is installed for packet capture.
Wi-Fi Adapter with Monitor Mode Support:
- Use a Wi-Fi adapter that supports monitor mode (required to capture raw 802.11 frames) and promiscuous mode (to capture all traffic, not just your device’s).
- Check adapter compatibility using iw list (Linux) or manufacturer documentation.
Permissions:
- Run Wireshark with administrative privileges (e.g., sudo wireshark on Linux) to enable monitor mode and capture raw packets.
- On Linux, add your user to the wireshark group to avoid running as root: sudo usermod -aG wireshark $USER.
Optional Tools:
- Install aircrack-ng (Linux) to manage monitor mode: sudo apt install aircrack-ng.
- Use a packet injection tool like airodump-ng to identify Wi-Fi channels and BSSIDs for targeted capture.

Step 2: Configure the Wi-Fi Adapter for Monitor Mode

To capture 802.11 management frames, the Wi-Fi adapter must be in monitor mode, which allows it to capture all frames on a channel, not just those destined for your device.

Linux:
- Identify your Wi-Fi interface: iw dev (e.g., wlan0).
- Stop interfering processes: sudo airmon-ng check kill.
- Enable monitor mode: sudo airmon-ng start wlan0
- This creates a monitor mode interface (e.g., wlan0mon).
- Set the channel (e.g., channel 6): sudo iwconfig wlan0mon channel 6
- Verify monitor mode: iwconfig wlan0mon (should show Mode:Monitor).
Windows:
- Npcap supports monitor mode for some adapters (e.g., Alfa AWUS036NHA).
- Use a third-party tool like Microsoft Network Monitor or manually configure the adapter via driver settings (if supported).
- Set the channel using a tool like netsh wlan or a vendor utility.
macOS:
- macOS 10.14+ supports native monitor mode for built-in adapters.
- Use the airport command (via Terminal): sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport en0 sniff 6
- This captures traffic on channel 6 and saves it to a file (e.g., /tmp/airportSniff*.cap).
- Open the capture file in Wireshark.
Considerations:
- Choose the correct channel to capture traffic from the target AP or STA. Use airodump-ng wlan0mon to scan for BSSIDs and channels.
- Monitor mode disables normal Wi-Fi connectivity on the adapter, so use a second adapter or Ethernet for internet access.

Step 3: Start Wireshark and Begin Packet Capture

Launch Wireshark:
- Open Wireshark with administrative privileges: sudo wireshark (Linux) or run as Administrator (Windows).
- On macOS, open Wireshark normally if using a pre-captured file from airport.
Select the Interface:
- In Wireshark’s main window, select the monitor mode interface (e.g., wlan0mon on Linux, or the Wi-Fi adapter on Windows/macOS).
- If capturing on macOS with airport, open the saved capture file (File > Open).
Configure Capture Options:
- Capture Filter (optional): Use a filter to reduce noise, e.g., wlan.fc.type == 0 for management frames only. This limits capture to 802.11 management frames, including Deauthentication and Disassociation.
- Radiotap/802.11 Headers: Ensure the adapter captures Radiotap or PPI headers, which include metadata like channel and signal strength. Wireshark automatically decodes these if supported by the driver.
- Encryption: If capturing encrypted traffic, you’ll need the WPA/WPA2/WPA3 key to decrypt frames (see Step 6 for decryption setup).
Start Capture:
- Click the green Start button or press Ctrl+E.
- Wireshark begins capturing all 802.11 frames on the selected channel.
Considerations:
- Capture on the same channel as the target AP or STA to avoid missing frames.
- Large captures can consume disk space; use a capture file size limit (e.g., 100 MB) via Capture > Options > Output.

Step 4: Filter for Deauthentication and Disassociation Frames

To log reason codes, filter the captured packets for Deauthentication and Disassociation frames, which contain the Reason Code field.

Apply a Display Filter:
- In Wireshark’s filter bar, enter: wlan.fc.type_subtype == 0x0c || wlan.fc.type_subtype == 0x0a
  - wlan.fc.type_subtype == 0x0c: Filters Deauthentication frames (subtype 12).
  - wlan.fc.type_subtype == 0x0a: Filters Disassociation frames (subtype 10).
- Press Enter to apply the filter, showing only relevant frames.
Alternative Filters:
- Filter by specific AP or STA MAC address: (wlan.fc.type_subtype == 0x0c || wlan.fc.type_subtype == 0x0a) && wlan.addr == 00:11:22:33:44:55
- Filter by BSSID: (wlan.fc.type_subtype == 0x0c || wlan.fc.type_subtype == 0x0a) && wlan.bssid == 00:11:22:33:44:55
- Filter by specific reason code (e.g., code 15 for 4-way handshake timeout): (wlan.fc.type_subtype == 0x0c || wlan.fc.type_subtype == 0x0a) && wlan.reason_code == 15
Verify Frames:
- Select a filtered frame in the packet list.
- In the Packet Details pane, expand the IEEE 802.11 Deauthentication or Disassociation section.
- Look for the Reason Code field (e.g., Reason Code: 0x000f (15) – 4-way handshake timeout). Wireshark decodes the code and provides a description based on the IEEE 802.11-2020 standard.
Considerations:
- Ensure Wireshark’s 802.11 dissector is up-to-date to correctly decode reason codes (older versions may lack newer codes like 66–77 for mesh networks).
- If frames are encrypted, reason codes may be unreadable without decryption (see Step 6).

Step 5: Log and Analyze Reason Codes

To log reason codes for analysis, you can manually inspect frames, export data, or automate logging.

Manual Inspection:
- Browse filtered frames in Wireshark’s packet list.
- Note the reason code, timestamp, source/destination MAC, and other details (e.g., RSSI from Radiotap headers).
- Example log entry (manual):
  - Timestamp: 2025-07-28 20:08:00 IST
  - Frame Type: Deauthentication
  - Source MAC: 00:11:22:33:44:55 (AP)
  - Destination MAC: 00:1A:2B:3C:4D:5E (STA)
  - Reason Code: 15 (4-way handshake timeout) RSSI: -70 dBm
Export Data:
- Export filtered packets to a file for later analysis:
  - File > Export Objects > Save All or File > Save As (save as .pcapng).
- Export reason code details to a text file:
  - Select filtered frames, then File > Export Packet Dissections > As Plain Text.
  - Choose fields like Frame Number, Time, Source, Destination, and Reason Code.
- Example exported CSV (via File > Export Packet Dissections > As CSV): "No.","Time","Source","Destination","Protocol","Reason Code" 1234,"2025-07-28 20:08:00","00:11:22:33:44:55","00:1A:2B:3C:4D:5E","802.11","15"
Automate Logging:
- Use Wireshark’s tshark (command-line version) to automate logging: tshark -i wlan0mon -f "type mgt subtype deauth or subtype disassoc" -T fields -e frame.time -e wlan.sa -e wlan.da -e wlan.reason_code -E header=y -E separator=, > reason_codes.csv
  - -i wlan0mon: Capture interface.
  - -f “type mgt subtype deauth or subtype disassoc”: Capture filter for Deauthentication/Disassociation frames.
  - -T fields: Output specific fields (time, source, destination, reason code).
  - -E header=y: Include CSV header.
  - Output example (reason_codes.csv): frame.time,wlan.sa,wlan.da,wlan.reason_code Jul 28, 2025 20:08:00.123456 IST,00:11:22:33:44:55,00:1A:2B:3C:4D:5E,15
Analyze Logs:
- Manual Analysis: Open the exported CSV in a spreadsheet (e.g., Excel) or text editor to identify frequent codes (e.g., code 4 for inactivity indicating sleeping devices).
Considerations:
- Large captures may require filtering before export to reduce file size.
- Cross-reference reason codes with other metrics (e.g., RSSI, retry counts) to diagnose issues (e.g., code 30 for beacon loss with low RSSI suggests signal issues).

Step 6: Handle Encrypted Traffic (Optional)

If the Wi-Fi network uses encryption (e.g., WPA2/WPA3), Deauthentication and Disassociation frames are typically unencrypted, but related frames (e.g., data or handshake frames) may be encrypted, complicating context analysis. To decrypt traffic for a complete view:

Obtain the Network Key:
- For WPA/WPA2/WPA3-Personal: Get the pre-shared key (PSK, i.e., Wi-Fi password).
- For WPA/WPA2/WPA3-Enterprise: Obtain the EAP credentials or session keys (if available, typically in lab environments).
Configure Wireshark for Decryption:
- Go to Edit > Preferences > Protocols > IEEE 802.11.
- Check Enable decryption.
- Click Edit under Decryption Keys.
- Add the network key:
  - Type: WPA-PWD (for PSK).
  - Key: Enter password:SSID (e.g., MyPassword:MyWiFi).
  - Alternatively, use the PSK directly (Type: WPA-PSK) if known.
- Click OK and Apply.
Capture the 4-Way Handshake:
- Ensure you capture the 4-way handshake (EAPOL frames) for the target STA, as Wireshark needs these to derive session keys.
- Filter for EAPOL frames: eapol in the display filter bar.
Verify Decryption:
- Decrypted frames appear as regular 802.11 data frames in Wireshark.
- If decryption fails, check the PSK, SSID, or ensure the handshake was captured.
Considerations:
- Deauthentication/Disassociation frames are unencrypted, so decryption is only needed for context (e.g., analyzing handshake failures leading to reason code 15).
- Decryption requires legal access to the network key; unauthorized decryption may violate laws.

Practical Examples

Below are real-world scenarios illustrating how to use Wireshark to log reason codes, with analysis and actions.

Scenario: Frequent Client Disconnections in an Office
- Context: Employees report intermittent Wi-Fi disconnections in a corporate network.
- Setup: Configure wlan0mon on channel 6, start Wireshark, and apply filter wlan.fc.type_subtype == 0x0c || wlan.fc.type_subtype == 0x0a.
- Capture: Observe multiple Deauthentication frames with reason code 15 (4-way handshake timeout).
- Log: Export to CSV using tshark: tshark -i wlan0mon -f "type mgt subtype deauth" -T fields -e frame.time -e wlan.reason_code > office_disconnects.csv
- Analysis: 20 instances of code 15 in 1 hour, correlated with low RSSI (-80 dBm), suggesting interference or PSK issues.
- Action: Adjust channel to avoid interference (e.g., switch to channel 11), verify PSK configuration.
- Impact: Reduces disconnections, improving employee productivity.
Scenario: Security Investigation in a Public Hotspot
- Context: A café Wi-Fi admin suspects unauthorized access attempts.
- Setup: Capture on channel 1 with wlan0mon, filter for wlan.fc.type_subtype == 0x0c && wlan.reason_code == 14.
- Capture: Detect Deauthentication frames with reason code 14 (MIC failure).
- Log: Manual inspection shows 5 code 14 events from a single MAC address.
- Analysis: MIC failures suggest a potential attack (e.g., frame tampering). Cross-reference with EAPOL frames to check handshake integrity.
- Action: Block the MAC address, enable MAC filtering, and monitor for further code 14 events.
- Impact: Mitigates security threats, protecting hotspot users.
Scenario: Mesh Network Peering Issues in a Smart Home
- Context: A smart home mesh network (e.g., Eero) fails to add new devices.
- Setup: Capture on channel 6, filter for wlan.fc.type_subtype == 0x0c && wlan.reason_code == 67.
- Capture: Identify Deauthentication frames with reason code 67 (mesh max peers reached).
- Log: Export to CSV and count occurrences: 10 code 67 events in 30 minutes.
- Analysis: The hub has reached its 32-device limit, preventing new peering.
- Action: Add a second hub to expand capacity, reconfigure peering.
- Impact: Scales the mesh network, ensuring all devices connect reliably.