ExtremeSwitching (EXOS)

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Neighbor shows DRother on point-to-point network

  • 1.  Neighbor shows DRother on point-to-point network

    Posted 09-05-2018 04:39


    hi,

    i'm studying EOS in my lab this is my topology


    im configuring OSPF between Core1 (EXOS) and PROD_RTR (Cisco IOS)
    both links are set to Point-to-Point
    OSPF Neibours came up on both Cisco and EXOS,

    on EXOS
    Core1.16 # show ospf neighbor
    Neighbor ID Pri State Up/Dead Time Address Interface
    BFD Session State
    ==========================================================================================
    10.10.10.20 1 FULL /DROTHER 00:00:00:44/00:00:00:03 172.20.20.2 PROD
    None [/code]on IOS
    PROD_RTR#show ip ospf neighbor
    Neighbor ID Pri State Dead Time Address Interface
    10.10.10.10 0 FULL/ - 00:00:32 172.20.20.1 Ethernet0/0[/code]my question, why does it show on EXOS and full /DROTHER?
    AFAIK, that state shouldn't show if we are using PTP and network type?
    Thanks


  • 2.  RE: Neighbor shows DRother on point-to-point network

    Posted 09-05-2018 05:42
    Hello Sulaiman Al Darmaki,

    It is expected behaviour. OSPF routers may operate as DR, BDR or DROTHER only.
    No DR/BDR elected on point-to-point or point-to-multipoint links, so the only "DROTHER" is left.



    Best Regards,
    Nikolay