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  • 1.  AS-Loop question

    Posted 03-28-2022 05:41
    I have following topology
    When I tried what Prefix received from 65432 on the vrf router,  I got AS loop
    root@MX-1#  run show route logical-system LS-1 receive-protocol bgp 10.50.1.12 hidden extensive
    
    LA-Demo.inet.0: 6 destinations, 7 routes (5 active, 0 holddown, 1 hidden)
      10.68.16.0/21 (1 entry, 0 announced)
         Nexthop: 10.50.1.12
         AS path: 65432 65434 65535 65534 I
         Hidden reason: AS path loop
    ​

    Any insight ??

    thanks !!






  • 2.  RE: AS-Loop question
    Best Answer

     
    Posted 03-28-2022 06:00
    With eBGP peers the standard requires that the peer ignore and hide prefixes from the same AS to prevent loops.  

    When using eBGP for a wan distribution like this you would need to assign a unique AS to each site on the network from the private AS range.

    ------------------------------
    Steve Puluka BSEET - Juniper Ambassador
    IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP)
    http://puluka.com/home
    ------------------------------



  • 3.  RE: AS-Loop question

    Posted 03-28-2022 09:45
    thanks a lot !!