MPLS P routers

[fawad.alam]

Just want to verify two things about MPLS:

1. MPLS P (core) routers only require only "mpls ip" enabled under interface config. IP CEF is also required ? There is NO other special MPLS config required on P routers ?

2. Under bgp process "address-family ipv4 vrf {name}" is required for each vrf no matter which routing protocol is used b/w PE & CE?

3. Is there a bgp redistribution required b/w "bgp VPNv4" and "address-family ipv4 vrf {name}" when BGP is used for routing b/w PE & CE? I guess NOT??

4. I have seen some configs where multiple VRFs were defined on CE routers. How does PE-CE connection works in this case? Which device pops the label?

[pkhatri]

1. That is correct. Note that 'mpls ip' will only enable LDP and you need more config if you want to do RSVP-TE. But for basic operation, that is sufficient. You do need to enable CEF.

2. Correct.

3. Correct, you don't.

4. This feature is called VRFLite or Multi-VRF. It simply allows multiple routing tables on CE routers and has nothing to do with MPLS.

Paresh.

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