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Question on EVPN Type 1 route without multihoming

  • 1.  Question on EVPN Type 1 route without multihoming

     
    Posted 12-20-2021 05:45

    Hi.

     

    I have an EVPN VXLAN VTEP that is advertising the following Type 1 EVPN route even though it is not a multihoming VTEP.

     

    {master:0}[edit]

    jcluser@DC2-Leaf1# run show route advertising-protocol bgp 10.255.1.1 table bgp match-prefix 1* detail   

     

    bgp.evpn.0: 7 destinations, 8 routes (7 active, 0 holddown, 0 hidden)

    * 1:10.255.1.3:0::050000fc4d00003a9800::FFFF:FFFF/192 AD/ESI (1 entry, 1 announced)

    BGP group OVERLAY type Internal

         Route Distinguisher: 10.255.1.3:0

         Route Label: 1

         Nexthop: Self

         Localpref: 100

         AS path: [64589] I

         Communities: target:64589:1111 encapsulation:vxlan(0x8) esi-label:0x0:all-active (label 0)

     

     

    This is being advertised because of a local IRB interface. I know this because this route is withdrawn when I delete the IRB interface.

     

    Below is relevant configuration. Can someone please let me know why this non-multihoming PE is advertising a Type 1 EVPN route, when only multihoming VTEPs are supposed to advertise them. Also, how is the ESI of this route computed to be 050000fc4d00003a9800?

     

    Thanks.

     

    {master:0}[edit]

    jcluser@DC2-Leaf1# show interfaces irb

    unit 150 {

        proxy-macip-advertisement;

        virtual-gateway-accept-data;

        family inet {

            address 192.168.150.1/24 {

                preferred;

                virtual-gateway-address 192.168.150.254;

     

     

    {master:0}[edit]

    jcluser@DC2-Leaf1# show switch-options

    vtep-source-interface lo0.0;

    route-distinguisher 10.255.1.3:1;

    vrf-target {

        target:64589:1111;

        auto;

    }

     

    {master:0}[edit]

    jcluser@DC2-Leaf1# show vlans

    VNI_15000 {

        vlan-id 150;

        l3-interface irb.150;

        vxlan {

            vni 15000;

        }

    }

    default {

        vlan-id 1;

    }

     

     

    {master:0}[edit]

    jcluser@DC2-Leaf1# show protocols evpn

    encapsulation vxlan;

    default-gateway no-gateway-community;

    extended-vni-list all;


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