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Forum Replies

  1. If you change the hello and dead time on R1, do you have to make the exact same change on the R2 interface? Do the hello and dead timers have to be the same on both routers?

  2. Hi Jason,

    These have to be match yes, otherwise no neighbor adjacency is established.

    Rene

  3. Dear Rene,
    Could enabling BFD be better option than reducing dead-hello timers regarding the consuming router resource?
    Which method do you recommend ?

  4. Dear Rene,

    Many Thanks to you .One question…

    Why Neighbor will not form if Hello/dead Mismatch ?? Could you please explain behind the reason on it ? I think if Hello/Dead is not same on both end then there could be operational related problem like One router release neighbor first while other router still wait, right ??

    br//
    zaman

  5. Hi Mohammad,

    A good question. I am referring to you to RFC which is a type of publication from the Internet Engineering Task Force (IETF) and the Internet Society (ISOC), the principal technical development and standards-setting bodies for the Internet.
    On April 1998, they have created the publication RFC 2328 for OSPF version 2, and on point 9.5 they spoke about “Sending Hello Packets” as following:

    “Hello packets are sent out each functioning router interface. They are used to discover and maintain neighbor relationships.[6] On broadcast and NBMA networks, He

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