[c-nsp] iBGP confed question

Tim Durack tdurack at gmail.com
Wed Jan 9 10:39:55 EST 2008


Something that I've been wondering about:

We run iBGP confeds between 3 POPs (seems more natural than
route-relectors), redundant routers at every POP, topology is
essentially a big ring over L2 transport.

iBGP sessions are between IGP loopbacks. (I always thought iBGP should
be between loopbacks, rather than interface addresses, that way
sessions survive link failures without effect.)

Is this correct, or is there an argument for iBGP between interface
addresses, making BGP more "aware" of the underlying topology? Maybe
it's a stupid question, but I haven't come up with a good answer
yet...

Tim:>


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