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WLC 5508 (7.0.116.0) users are disconnecting intermittently - AP 1242 running 12.4

     

     

    Introduction

    WLC 5508 (7.0.116.0) users are disconnecting intermittently - AP 1242 running 12.4

    Scenario

    WLC 5508 (Image:7.0.116.0) and 18 AP's model 1242 {image:12.4(23c)JA2} are connected to WLC.

    Core Issue

    Users are disconnected for few seconds 4 to 5 times in a day and all access points are showing the following messages. There is no logs related to disconnected of radio interface in WLC. When users are disconnected, Users are in wireless range but we cant able to ping WLC. WLC is running in mixed mode (802.11a and 802.11b/g). All AP's are powered through power injector.

     

    11950-228519.jpg

     

    Error Logs

    *Jul 3 02:53:18.263: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset
    *Jul 3 02:53:18.320: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up
    *Jul 3 02:53:18.326: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down
    *Jul 3 02:53:18.337: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    *Jul 3 02:53:18.351: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 09:06:08.936: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down
    *Jul 3 09:06:08.970: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    *Jul 3 09:06:08.984: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 09:46:25.107: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down
    *Jul 3 09:46:25.118: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    --More-- *Jul 3 09:46:25.132: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 12:14:36.390: %DOT11-4-CCMP_REPLAY: Client 0026.c61c.82ae had 1 AES-CCMP TSC replays
    *Jul 3 12:33:30.370: %DOT11-4-CCMP_REPLAY: Client 0026.c644.d95a had 1 AES-CCMP TSC replays
    *Jul 3 17:00:10.044: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to 10.xxx.75.5:5246
    *Jul 3 17:00:10.091: %WIDS-5-DISABLED: IDS Signature is removed and disabled.
    *Jul 3 17:00:10.093: %CAPWAP-5-CHANGED: CAPWAP changed state to DISCOVERY
    *Jul 3 17:00:10.093: %CAPWAP-5-CHANGED: CAPWAP changed state to DISCOVERY
    *Jul 3 17:00:10.151: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to administratively down
    *Jul 3 17:00:10.151: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to administratively down
    *Jul 3 17:00:10.163: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    *Jul 3 17:00:10.181: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up
    *Jul 3 17:00:10.194: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 17:00:10.206: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset
    *Jul 3 17:00:10.222: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up*Jul 3 02:53:18.263: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset
    *Jul 3 02:53:18.320: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up
    *Jul 3 02:53:18.326: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down
    *Jul 3 02:53:18.337: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    *Jul 3 02:53:18.351: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 09:06:08.936: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down
    *Jul 3 09:06:08.970: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    *Jul 3 09:06:08.984: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 09:46:25.107: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down
    *Jul 3 09:46:25.118: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    --More-- *Jul 3 09:46:25.132: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 12:14:36.390: %DOT11-4-CCMP_REPLAY: Client 0026.c61c.82ae had 1 AES-CCMP TSC replays
    *Jul 3 12:33:30.370: %DOT11-4-CCMP_REPLAY: Client 0026.c644.d95a had 1 AES-CCMP TSC replays
    *Jul 3 17:00:10.044: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to 10.xxx.75.5:5246
    *Jul 3 17:00:10.091: %WIDS-5-DISABLED: IDS Signature is removed and disabled.
    *Jul 3 17:00:10.093: %CAPWAP-5-CHANGED: CAPWAP changed state to DISCOVERY
    *Jul 3 17:00:10.093: %CAPWAP-5-CHANGED: CAPWAP changed state to DISCOVERY
    *Jul 3 17:00:10.151: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to administratively down
    *Jul 3 17:00:10.151: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to administratively down
    *Jul 3 17:00:10.163: %LINK-5-CHANGED: Interface Dot11Radio0, changed state to reset
    *Jul 3 17:00:10.181: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up
    *Jul 3 17:00:10.194: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to up
    *Jul 3 17:00:10.206: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset
    *Jul 3 17:00:10.222: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up

    More Details

    • Distance of Power injector and AP is around 40 to 50 meters.
    • All AP's are in local mode.

    Solution

    The following changes fixed the issue without radio resets.

    Radio interfaces of APs are resetting with code 62 and this is most likely due to RRM setting the channel. Earlier the RRM-DCA setting was 10 minutes hence channel changed every 10 minutes which now has been configured 24 hours which is maximum.

    All APs are working without Radio resets.

    From the Interval drop-down list, choose one of the following options to specify how often the DCA algorithm is allowed to run: 10 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 6 hours, 8 hours, 12 hours, or 24 hours. The default value is 10 minutes.

     

    Untitled.jpg

    Note:

    If your controller supports only OfficeExtend access points, we recommend that you set the DCA interval to 6 hours for optimal performance. For deployments with a combination of OfficeExtend access points and local access points, the range of 10 minutes to 24 hours can be used.

    Source

    Using the GUI to Configure Dynamic Channel Assignment

    This document was generated from the following discussion: WLC 5508 users are disconnected intermittently

    Comments
    Community Member

    Thanks for putting this together Vinay. It certainly helps!

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