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Confused about Anycast SID behavior in SR MPLS :(

  • 1.  Confused about Anycast SID behavior in SR MPLS :(

    This message was posted by a user wishing to remain anonymous
    Posted 05-13-2024 10:05
    This message was posted by a user wishing to remain anonymous

    Folks,

    Can someone shed light on something basic? I thought Anycast SID in SR-MPLS is ECMP aware. I do get two routes out of two different interfaces, but observe no ECMP behavior and the traffic (1000 ICMPs x 5 separate tries) leaves via the other (non >) interface.  May be I am missing something basic. Thank you for your time,

    jcluser@vMX3> show interfaces ge-0/0/0 | match output                    
      Output rate    : 216 bps (0 pps)
        Output packets: 317
     
    jcluser@vMX3> show interfaces ge-0/0/4 | match output                    
      Output rate    : 2656 bps (3 pps)
        Output packets: 5319
     
    jcluser@vMX3> show route table mpls.0 label 800499                       
     
    mpls.0: 19 destinations, 19 routes (19 active, 0 holddown, 0 hidden)
    + = Active Route, - = Last Active, * = Both
     
    800499             *[L-ISIS/14] 01:02:54, metric 10
                           to 10.100.131.1 via ge-0/0/4.0, Pop      
                        >  to 10.100.34.2 via ge-0/0/0.0, Pop      
    800499(S=0)        *[L-ISIS/14] 01:02:54, metric 10
                           to 10.100.131.1 via ge-0/0/4.0, Pop      
                        >  to 10.100.34.2 via ge-0/0/0.0, Pop      
     
    jcluser@vMX3>