MPLS questions about tunnels

Unanswered Question
May 16th, 2007

I have a question

If I have 2 MPLS tunnels as follows,

PE1 ------> PE2

PE1 ------> PE3

Which PE is the Ingress and Egress ?

I am getting asked this question with the same syntax in a practice exam. It doesn't specify whether TE tunnel or LSP.

Another question,

Why does show ip bgp neighbors on my PE not show my sessions with the RR unless I explicitly enter their IP addresses ?

If I do a show ip bgp neighbors I don't get anything. If I do show ip bgp neighbors I will see the session.

So it means I have to look at the config to get the neighbor IP address first ?

That doesn't seem optimal..



I have this problem too.
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swaroop.potdar Wed, 05/16/2007 - 08:56

1) your PE 1 is the ingress and PE2 and PE3 are egress.

2) You should get the BGP and TCP info for all the adjacent neighbours if you use "show ip bgp neighbors". And to see the adjacent neighbors IP you dont have to see the configuration. You can issue simply " show ip bgp summ" and you will see the IP.



dtushing123 Wed, 05/16/2007 - 14:04


Thanks for the answer to Q1.

I think the reason I don't see anything with show ip bgp neighbors is that there are no ipv4 unicast neighbors. I have to do a show ip bgp vpnv4 vrf vrfname neighbors.... phew !




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