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Notable Replies

  1. Great explanation. Peer groups saves a lot of time and headache. Thanks

    Ammar,
    CCIE R&S - in progress

  2. Hi Rene,

    I think that in configuration there is missing a static route to each of the peer's loopback addresses.

    George

  3. Hi George,

    That's right, this example only shows a "before" and "after" of using peer groups. You will need static routes to reach the loopback addresses of the remote peers.

    Rene

  4. how does this reduce CPU cycle by means of BGP updates ? only the configuration command got collapsed but the functionality remains the same right ?

  5. Hi,

    I have a problem in R1 he doesn't create any neighbor relationship:

    These are the logs:

    *Jul  9 17:58:35.187: BGP: ses global 3.3.3.3 (0x655EF9CC:0) act Reset (Active open failed).
    *Jul  9 17:58:35.199: BGP: 3.3.3.3 active went from Active to Idle
    *Jul  9 17:58:35.199: BGP: nbr global 3.3.3.3 Active open failed - open timer running
    *Jul  9 17:58:35.203: BGP: nbr global 3.3.3.3 Active open failed - open timer running

    Example for R3 but it's the same for R2 and R4:

    router bgp 1
     bgp log-neighbor-changes
     neighbor R2_R3_R4 peer-group
     neighbor R2_R3_R4 ebgp-multihop 2
     neighbor R2_R3_R4 update-source Loopback0
     neighbor 2.2.2.2 remote-as 2
     neighbor 2.2.2.2 peer-group R2_R3_R4
     neighbor 3.3.3.3 remote-as 3
     neighbor 3.3.3.3 peer-group R2_R3_R4
     neighbor 4.4.4.4 remote-as 4
     neighbor 4.4.4.4 peer-group R2_R3_R4

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