vrf on Cisco 7600

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Feb 6th, 2008
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We have a Cisco 7600.

There's one VRF (not counting the default-vrf). We're using 2 AS Numbers.

router bgp 11111


! here are the configurations of peers in default-vrf


address-family ipv4 vrf VRF1


! here are the configurations of peer in vrf VRF1

! they differ from previous one's by the following string:

! neighbor PEER1-PG local-as 22222 no-prepend replace-as

In this case, the result is as expected, except

1. if there's no filtration, the peers are receiving prefixes which are sent from themselves (in both vrf's)

2. the announcement from VRF1 passing through the world is reached and received by default-vrf but not vice-versa

bgp router-id's are different.

Can anyone tell us what could be the problem?

Thanks in Advance

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wdrootz Tue, 02/12/2008 - 09:36
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You need to go for per VRF router ID. The Per-VRF Assignment of BGP Router ID feature introduces the ability to have VRF-to-VRF peering in BGP on the same router. BGP is designed to refuse a session with itself because of the router ID check. The per-VRF assignment feature allows a separate router ID per VRF using a new keyword in the existing bgp router-id command. The router ID can be manually configured for each VRF or can be assigned automatically either globally under address family configuration mode or for each VRF.


surenx_cisco Wed, 02/13/2008 - 04:45
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Actually the Router-ID's are different and there's no peering between the two VRF's.

The main problem is that they can see each other's announcements through the world.

And the aforementioned problems take place.


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