From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Sun Dec 31 2000 - 12:58:31 GMT-3
Hi All,
I'm working on some labs and I am doing this one lab using first
redistribution and second
network statements under bgp.
My question is if you have 3 ibgp neighbors in AS 200. Router 1 is EBGP
peered to AS100. Router 2 and
3 are EBGP peered to AS300. Since Router 1, 2 and 3 are in the same AS,
running an IGP, so they
have knowledge of all internal routes, is it best to put a network
statement for the local network numbers in
all 3 BGP routers or just one?
I am using network 10.x.x.x, so I put in router 2 network statements for
all the particular
subnets and then an aggregate-summary address (I guess, I could just have
left auto-summary on also).
I noticed that routers 1 and 3 get
the route via IBGP, since they have routes to the 10.x.x.x network it
becomes a best route
and they advertise it via EBGP.
Any rules of thumb? Perhaps it is best to put it in all border routers
incase internal routing fails?
Julie Ann
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Julie Ann Connary
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c i s c o S y s t e m s Email: jconnary@cisco.com
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