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Cisco 1250/1141N AP displays ghost client sessions with 12.4(25d)JA

Document

Tue, 02/18/2014 - 04:09
Apr 25th, 2013
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Introduction

Cisco standalone IOS 1252AP has number of SSIDs (MBSSID guest-mode) and one is a public access. It has been noted since the IOS upgrade that the client associations are just growing and growing, and never seem to timeout, even though they are no longer associated, as per the example below:


Problem Category

Wireless


Problem Subcategory

Cisco Aironet 1250 Series Access Point


Software

12.4(25d)JA


Hardware

Cisco standalone IOS 1252AP/1141N


Problem Description

THEAP#show dot11 associations


802.11 Client Stations on Dot11Radio0:

SSID [XXXXXXXXX] :


MAC Address    IP address      Device        Name            Parent         State   

0023.322c.xxxx 0.0.0.0         unknown       -               self           Assoc  

581f.aa41.xxxx 0.0.0.0         unknown       -               self           Assoc  

9084.0d2c.xxxx 0.0.0.0         unknown       -               self           Assoc  

dc2b.615b.xxxx 0.0.0.0         unknown       -               self           Assoc  

THEAP#show dot11 associations dc2b.615b.xxxx
Address           : dc2b.615b.xxxx     Name             : NONE
IP Address        : 0.0.0.0            Interface        : Dot11Radio 0
Device            : unknown            Software Version : NONE
CCX Version       : NONE               Client MFP       : Off
State             : Assoc              Parent           : self             
SSID              : Internode                     
VLAN              : 5
Hops to Infra     : 1                
Clients Associated: 0                  Repeaters associated: 0

This only seems to happen on dot110 (b/g) radio, perhaps due to this being a common client. Tried adding the following to see if the default of 60 is broken

dot11 activity-timeout unknown default 70

Resolution

1141N AP displays ghost client sessions

Symptom:1141N AP running 12.4(25d)JA code displays ghost client sessions . The expired client sessions are not getting removed on AIR-AP1141N-E-K9 and 'show dot11 association all-clients' output displays some of the expired client entries as well. This behavior is seen in customer n/w and particularly on access-points placed in environments (public hotspot solution) with many "unintended" associations e.g. people passing by with smartphones seems to accumulate associations.


Conditions:Wait some time till the ghost clients are associated to AP.


Workaround:
1. clear dot11 client < MAC of client> will clear the particular client.
2. reload the image will clear all the ghost clients.
3. issue "shut" and "no shut" on interface


Fixed-In

7.2(0.4)

7.2(1.37)

12.4(25d)JA1

7.2(103.0)

12.4(25e)JAL1



1141N AP displays ghost client sessions - CSCtl98313

Reference

This document was generated from the following discussion: Cisco 1250 12.4(25d)JA dot11 client associations not aging

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