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what route types are supposed to be contained in __default_evpn__.evpn.0: ?

  • 1.  what route types are supposed to be contained in __default_evpn__.evpn.0: ?

    Posted 08-29-2021 19:51
    I am learning the different evpn route table, I have a question about __default_evpn__.evpn.0. I came across the following from here:

    __default_evpn__.evpn.0: used for carrying MP-BGP information about ethernet segment routes.  This is only applicable for PE that have non default ESI [ie, multihomed CE].  All EVPN NLRI Type 4 routes are also stored in the secondary __default_evpn__.evpn.0 table since they do not contain a Route Target community that corresponds to any specific EVI.

    __default_evpn__.evpn.0: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
    1:143.235.32.106:0::0700000000000000::FFFF:FFFF/304 (1 entry, 1 announced)
            *EVPN   Preference: 170
                    Task: __default_evpn__-evpn
                    Announcement bits (1): 1-BGP_RT_Background 
                    Communities: target:65010:700 esi-label:single-active (label 0)
    
    4:143.235.32.38:0::0700000000000000:143.235.32.38/304 (1 entry, 1 announced)
            *BGP    Preference: 170/-101
                    Route Distinguisher: 143.235.32.38:0
                    Task: BGP_65010.143.235.32.112+179
                    Announcement bits (1): 0-__default_evpn__-evpn 
                    Communities: es-import-target:7-0-0-0-0-0
                    Import Accepted
                    Primary Routing Table bgp.evpn.0
    
    4:143.235.32.106:0::0700000000000000:143.235.32.106/304 (1 entry, 1 announced)
            *EVPN   Preference: 170
                    Task: __default_evpn__-evpn
                    Announcement bits (1): 1-BGP_RT_Background 
                    Communities: es-import-target:7-0-0-0-0-0
    ​

    Does __default_evpn__.evpn.0 only contain type 1 and type 4 route types ?

    I have only vMX which is not stable. Sometimes I can see type 2 and type 3, sometimes I do not see any entries.  (I do not have multi-home configured)
    In QFX10008, I do not see any entries as follows:

    root@evpn> show bgp summary
    Threading mode: BGP I/O
    Groups: 5 Peers: 5 Down peers: 0
    Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending
    bgp.evpn.0
                        9707       9707          0          0          0          0
    Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
    10.68.191.193         65534     231760    3541950       0      43 10w3d 12:20:10 Establ
      bgp.evpn.0: 221/221/221/0
      default-switch.evpn.0: 221/221/221/0
      __default_evpn__.evpn.0: 0/0/0/0
    

    Anyone can clarify this for me ?

    thanks !!