Routers imported between VRFs on same PE ?

[pkhatri]

Hi all,

This question pertains to the use of rfc2547bis VPNS...

When there are two VRFs on a PE and one of them has a route-import target that matches the route-export target of the other VRF (i.e. one VRF imports routes exported by the other VRF on the same box), why is it that these routes appear as EBGP routes in the second VRF, no matter how they were learned by the first VRF ?

Is there anyway this behaviour can be changed ?

Cheers,

Paresh.

[Harold Ritter]

This is indeed normal behavior as prefixes have to be exported to BGP before they can be imported into the other VRF. There is no way to change that bahavior.

Why is this an issue?

Hope this helps,

[pkhatri]

Hi Harold,

I guess my query here is why they don't appear as IBGP routes, as do other routes which are learned from other PE routers ?

Paresh.

[ellemen]

1.How do you define the routes are EBGP routes? As-path?

2.No matter how they were learned from the first VRF?

From VRF A to VRF B only via BGP, is there any option?

For instant, VRF A ----VRF B

1. If igp is running between CE-PE on VRF B, On VRF A's routing table as-path is ? or u may change to i

2. If ibgp is running between CE-PE on VRF B, On VRF A's routing table as-path is i

3. If ebgp is running between CE-PE on VRF B, On VRF A' routing table as-path is X i (X= CE's AS)

anyway the routes how they appear is not a big deal.