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IAP 505 cluster AP checksum error

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  • 1.  IAP 505 cluster AP checksum error

    Posted Aug 13, 2020 10:00 AM

    hello,

     

    I just deployed a brand new IAP-505 cluster (controlerless) in version 8.6.0.4 but it is unstable... I explain myself:

     - every AP that is connected on a different switch than the one where is the virtual controler has a log message: AP checksum error

     - when I modify the configuration, the Wifi is completely unstable for about 5 min.

     

    here is a quick output of # show log system from the VC

    Aug 13 15:56:56 cli[4664]: <341132> <WARN> |AP AP-CH1-04@10.6.12.148 cli| Check sum mismatch for AP-10.6.12.166, slave 28729 vs master 1259, error_cnt 1, recover_sent 6.
    Aug 13 15:56:56 cli[4664]: <341132> <WARN> |AP AP-CH1-04@10.6.12.148 cli| Check sum mismatch for AP-10.6.12.160, slave 28729 vs master 1259, error_cnt 7, recover_sent 6.
    Aug 13 15:56:57 cli[4664]: <341132> <WARN> |AP AP-CH1-04@10.6.12.148 cli| Check sum mismatch for AP-10.6.12.152, slave 28729 vs master 1259, error_cnt 6, recover_sent 6.

     

    the cluster is managed by airwave.

    the switches are also Aruba and the network topology is simple ( a simple star). Spanning tree is enable (MST)

     

    I'm used to deploy IAP-305 and I never had that kind of issue.

     

    Do you have any idea?

     

    Thank you for your help

     

    Clement



  • 2.  RE: IAP 505 cluster AP checksum error

    EMPLOYEE
    Posted Aug 14, 2020 04:01 AM

    From what you explain: APs on the same switch as the VC are fine, those on a different switch get out of sync, suggest to me there is something between the switches.

     

    Do you see anything in the switch logs, like spanning-tree block?

     

    Have not seen this recently, so if there is no further response please reach out to Aruba Support and have them look at it.



  • 3.  RE: IAP 505 cluster AP checksum error

    Posted Apr 26, 2021 07:54 AM
    Hi Clement,
    Did you find a resolution to this?  I'm seeing similar issues with IAP-515 instant clusters on AOS 8.6.0.4
    Many thanks
    Ronnie

    ------------------------------
    Ronnie Guthrie
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    Original Message