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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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Aruba 8.x - Cluster on L3 issue

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  • 1.  Aruba 8.x - Cluster on L3 issue

    Posted May 23, 2019 06:09 PM



    Maybe it is simple, but I cannot find a good example and info.


    I try to configure L3 cluster between two MC 7205 - they are in seperate DCs and seperate networks. 

    I have configured Cluster group under managed devices level and then added each physical controller to this group. 


    When I issue:

    show lc-cluster group-membership

    I see that self is in ISOLATED state and state of peer is alternating from 





    In error logs I have 

    <ERRS> |cluster_mgr|  cluster_gsm_delete_target_from_cluster_rep_key, Target not present in cluster_rep_key


    I suppose that I have missed a key somewhere, but I don't know where


    Maybe someone had similar issue ?

    Any help will be ok






  • 2.  RE: Aruba 8.x - Cluster on L3 issue

    Posted May 23, 2019 10:36 PM

    A layer 3 cluster is not a feature...it is a drawback....  It indicates when a layer 2 cluster is misconfigured.  It doesn't really serve a purpose.  If an AP in a layer 3 cluster fails over to a second controller, it will deauth all of the clients on the AP and disconnect their sessions before failing over.  Again, it doesn't make sense, and don't configure it.  You might as well have failover between two local controllers that do not share the same layer 2 client VLAN.

  • 3.  RE: Aruba 8.x - Cluster on L3 issue

    Posted May 24, 2019 03:03 AM



    Thanks cjoseph for the replay 


    ok, so what would You recomend for L3 connections between controlers ? LMS/Backup LMS or something more ?

    I have made assumption that client can be deauth and disconnected. It is only for distatsrer recovery situation 




  • 4.  RE: Aruba 8.x - Cluster on L3 issue
    Best Answer

    Posted May 24, 2019 06:05 AM

    Backup lms

  • 5.  RE: Aruba 8.x - Cluster on L3 issue

    Posted May 26, 2019 03:25 PM