bgp route advertisment , particularly aggregate/summary to one

In a recent scenario I was using for my studies I was presented with the
following..Please tell me how to do the following or link to where it is on
doc cd.

If R1 has in its igp table.

172.16.1.0/24

172.16.2.0/24

172.16.3.0/24

And you need to send an aggregate of that as 172.0.0.0/8 to a IBGP neighbor
how would you accomplish that? I don't think a static route is permissible.
I don't think you can create additional interfaces on r1 either.

If you can just verbalize to me a few ideas of how that is accomplished
without some elaborate config then that's fine.like what are the moving
parts?

Is it possible to generate an aggregate based solely on the contents of the
IGP table? I think I read that a subordinate part of a larger aggregate
needs to be present in the igp table in order for the aggregate to be sent,
but do I use "aggregate-address" ?....suppresmap? unsurprssmap? .neighbor
statement to that certain neighbor?

Aaron

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Received on Sat Mar 10 2012 - 12:58:23 ART