[c-nsp] BGP interacting with IRP

[Drew Weaver]

	This is more of a "what do you guys do" question than a problem
per se.

Say you have two or more routers connected to the Internet via multiple
providers. BGP will only announce/advertise prefixes for which the
router has a route for, so you use something like on RouterA:

ip route pre.fix.num.one 255.255.224.0 Null0 254

The router advertises to its peers that the next-hop for
pre.fix.num.one/19 is 0.0.0.0.

On RouterB, exact same configuration; however the next-hop for the
advertised/announced prefixes is seen as RouterA due to the aggregate
routes for the prefixes being inserted into the IRP of your choice.

I guess theoretically, the long and short of this question is, should
you filter the default aggregate routes used for BGP from your IRP of
choice?

Thanks all,
Andrew