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User receives the "%DOT11-4-MAXRETRIES: Packet to client [mac] reached max retries" error message

Core Issue

The message indicates that the Access Point (AP) attempted to poll the client a certain number of times, but did not receive a response. Therefore, the client is removed from the association table.

Resolution

This issue is commonly seen when the client and AP are attempting to communicate in a noisy Radio Frequency (RF) environment.To resolve this issue, see if a snapshot reveals noise in the radio spectrum by trying to run  a carrier busy test on the AP. Attempt to alleviate any unwanted noise. 

If using non-Cisco clients, try disabling Aironet extensions on the AP radio.

Perform these steps:

  1. Select Network Interfaces.
  2. Select Radio-802.11.
  3. Select the Settings tab at the top of the page.
  4. Scroll down to Aironet Extensions and set to Disable.
  5. Apply the new settings.
  6. If the problem persists, make certain your clients are running their latest firmware or drivers.

    If the problem continues to persist, contact your nearest Cisco Support Center.

Problem Type

Error message

Comments
Community Member

Hi All,

We are getting below error massage from cisco aironet AP. Since when i configured the sys log on this device. this continously flooding email with this error massage. please provide the solution as i m using though CLI mode..

Device & IOS detail : C1250 Software (C1250-K9W7-M), Version 12.4(25d)JA1

The Error message:-

1449: Dec 20 23:49:30: %DOT11-4-MAXRETRIES: Packet to client 0023.68b0.b404 reached max retries, removing the client

Regards,

Gopal Pathak

Bronze

Hi

What is the SNR reported for the client. You could possibly increase the packet retry parameter on the AP from default of 64 to 128. This is done on the dot11 radio interface. However before you do so, confirm that the client isn't too far from the AP and having poor signal levels.

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