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Two AP MACs showing up on same switch port

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  • 1.  Two AP MACs showing up on same switch port

    Posted Jan 06, 2015 11:14 AM

    I'm showing the MAC address of two separate APs (IAP 105s) on the same switch port as below:

     

    (MAST-MDF) # show mac-address-table | include 24:de:c6:c3:e5:6c
    24:de:c6:c3:e5:6c Learnt 0422 GE1/0/0
    24:de:c6:c3:e5:6c Learnt 0472 GE1/0/0

    (MAST-MDF) # show mac-address-table | include 9c:1c:12:c9:87:2f
    9c:1c:12:c9:87:2f Learnt 0472 GE1/0/0

     

    The two APs are connected to separate ports on the same switch in a stack of three switches. Any idea why this would be and if there's a way to correct it?

     

    Thanks.



  • 2.  RE: Two AP MACs showing up on same switch port

    EMPLOYEE
    Posted Jan 06, 2015 11:22 AM

    Jkoelker,

    What ports are the APs actually on? It is interesting to see that one of the MAC addreses is being learned on a different VLAN (422). What VLAN should they be on? It looks like a loop of some type.

     

    Best regards,

     

    Madani



  • 3.  RE: Two AP MACs showing up on same switch port

    Posted Jan 06, 2015 11:28 AM

    Hi, Madani - 

     

    24:de:c6:c3:e5:6c is connected on port 1/0/0

    9c:1c:12:c9:87:2f is connected on port 1/0/45

     

    The APs should reside on vlan472 - vlan 422 is a user-access vlan.



  • 4.  RE: Two AP MACs showing up on same switch port

    Posted Jan 06, 2015 11:58 AM

    Hi Friend,

     

    Which Image version you are using in MAS ? for reconfirm, APs are directly connected to the MAS right ?

     

    please clarify.



  • 5.  RE: Two AP MACs showing up on same switch port

    Posted Jan 06, 2015 12:06 PM

    Out at site now - have re-booted AP by power-cycling and it is unable to boot normally. Looks like it may have failed.



  • 6.  RE: Two AP MACs showing up on same switch port

    EMPLOYEE
    Posted Jan 06, 2015 02:28 PM

    Can you console into it?

     

    I'm still trying to figure out how that MAC would appear on a different port. It's indicative of a loop condition and not necessarily a code issue on the MAS. One thought was that the IAP was using the other IAP as a gateway but that would require things like MESH or wifi uplink to be enabled.

     

    Best regards,

     

    Madani