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Please help me to understand where AS-Loop occurs in my topology ?

  • 1.  Please help me to understand where AS-Loop occurs in my topology ?

    Posted 09-17-2021 12:14
    I have the following topology:
    root@vMX-1# run show route hidden table bgp.evpn.0 extensive
    
    bgp.evpn.0: 27 destinations, 64 routes (27 active, 0 holddown, 16 hidden)
    2:192.168.1.3:3::10::00:05:86:71:dc:03/304 MAC/IP (3 entries, 1 announced)
    TSI:
    Page 0 idx 1, (group overlay type Internal) Type 1 val 0xb20cda4 (adv_entry)
       Advertised metrics:
         Nexthop: 192.168.1.3
         Localpref: 100
         AS path: 64511 65535 I
         Communities: target:10:10 encapsulation:vxlan(0x8)
    Path 2:192.168.1.3:3::10::00:05:86:71:dc:03 from 192.168.1.33 Vector len 4.  Val: 1
             BGP
                    Route Distinguisher: 192.168.1.3:3
                    Next hop type: Indirect, Next hop index: 0
                    Address: 0xc634390
                    Next-hop reference count: 35
                    Source: 192.168.1.22
                    Protocol next hop: 192.168.1.3
                    Indirect next hop: 0x2 no-forward INH Session ID: 0x0
                    State: <Hidden Int Ext Changed>
                    Inactive reason: Unusable path
                    Local AS: 65534 Peer AS: 65534
                    Age: 10:40:05   Metric2: 0
                    Validation State: unverified
                    Task: BGP_65534.192.168.1.22+179
                    AS path: 64511 65535 I
                    Communities: target:10:10 encapsulation:vxlan(0x8)
                    Import
                    Route Label: 10
                    ESI: 00:00:00:00:00:00:00:00:00:00
                    Router ID: 192.168.1.22
                    Hidden reason: AS path loop
                    Secondary Tables: vpn1.evpn.0 __default_evpn__.evpn.0
                    Indirect next hops: 1
                            Protocol next hop: 192.168.1.3 Metric: 0
                            Indirect next hop: 0x2 no-forward INH Session ID: 0x0
                            Indirect path forwarding next hops: 1
                                    Next hop type: Router
                                    Next hop: 10.20.1.1 via ge-0/0/5.0
                                    Session Id: 0x140
                                    192.168.1.3/32 Originating RIB: inet.0
                                      Metric: 0     Node path count: 1
                                      Forwarding nexthops: 1
                                            Nexthop: 10.20.1.1 via ge-0/0/5.0
                                            Session Id: 140
    ​

    Where does AS Loop occur here ? 

    thanks !!!