[c-nsp] BGP Question

[Arne Larsen / Region Nordjylland]

If an EBGP peer is more than one hop away from the local router, you must specify the next hop to the peer so that the two systems can establish a BGP session.

neighbor x.x.x.x remote-as xxx
neighbor x.x.x.x ebgp-multihop

/Arne

-----Oprindelig meddelelse-----
Fra: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] På vegne af tkacprzynski at spencerstuart.com
Sendt: 15. januar 2009 23:13
Til: cisco-nsp at puck.nether.net
Emne: [c-nsp] BGP Question

Hello,
I'm trying to figure out if this configuration can be accomplished.

Topology


CPE-----------CE-----------PE -------- Internet
ASN 1                             ASN 3

I'm trying to figure out a way where CPE and PE is peering with each other, where CE is not using iBGP between PE but can still filter some of the routes from PE. The PE can't really have any "custom"
configuration except simple neighboring. I have more flexibility with the CE.

The PE basically has a lot of summary routes that I need to make more specific, but can't really change much on the PE, the idea is to use the CE to modify them then send the CPE more specific routes based on the summary routes. The requirement for more specific routers is there to eliminate some asymmetric routing (other links not shown).

I was looking at Local-AS and whether that could help. Not sure.

Any suggestions are greatly appreciated.

Thank you

Tom


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