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Notable Replies

  1. Hello Rene

    How do you use the glass server?

  2. Jon says:

    Hi @azmuddincisco,

    Great question! You are right in thinking that a router running BGP will normally only share its "best" route with another BGP peer. However for its own internal it's possible the router can push both routes to the RIB and make use of IOS load balancing.

    We can check if this is the case by verifying the output of "show ip route". It would also help to also see the BGP config for the left hand router (including any "maximum-paths" value).

    Kind regards,
    Jon

  3. Hello Jon,
    Thanks for your reply. I do not have maximum-path enabled. Therefore, the router is using only one route as the best path which is 20.0.0.2. Also in the BGP table, 20.0.0.2 has the best path tag on it as we see in the screenshot. My question is why other one(10. 0.0.2) has the tag (received & used) even though it is not being used? Thank you.

    Azm

  4. Hello Azm

    It may be possible that you have the neighbor soft-reconfiguration inbound command enabled on your router. According to Cisco:

    The neighbor soft-reconfiguration inbound command causes the router to store all received (inbound) routing policy updates without modification, for example, a duplicate table is stored in the memory for each peer. This method is memory-intensive and not recommended unless absolutely necessary.

    The (received and used usually indicates that the prefix from a soft-reconfiguration-enabled peer was not filtered so it is placed into the regular BGP table. But it is not necessarily the best path.

    Check your config and get back to us!

    I hope this has been helpful!

    Laz

  5. Hey Laz,
    You are absolutely correct. Just tested that in the lab and it was exactly what you said.
    EXCELLENT !!!!!!

    Without Soft -reconfiguration

    with Soft-reconfiguration

    Azm

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