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Can I use EIGRP as a MPLS Backbone IGP

Hi,

Always believed MPLS only runs on IS-IS and OSPF as backbone IGP. Is it possible to use EIGRP as a backbone IGP as well?

My customer uses EIGRP right now and we want to migrate VRF-lite to a real MPLS cloud. Can I re-use EIGRP?

Best regards,

Peter

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Cisco Employee

Re: Can I use EIGRP as a MPLS Backbone IGP

Hi Peter,

For plain MPLS, there is no restriction that you need OSPF or ISIS. But when you plan to implement MPLS TE, you need a link state protocol. So if you dont have any plan to go for Traffic Engg, I think you can continue with EIGRP.

HTH,

Nagendra

3 REPLIES
Cisco Employee

Re: Can I use EIGRP as a MPLS Backbone IGP

Hi Peter,

For plain MPLS, there is no restriction that you need OSPF or ISIS. But when you plan to implement MPLS TE, you need a link state protocol. So if you dont have any plan to go for Traffic Engg, I think you can continue with EIGRP.

HTH,

Nagendra

Cisco Employee

Re: Can I use EIGRP as a MPLS Backbone IGP

There are number of service providers running EIGRP as IGP in the backbone...e.g Infonet (now BT Infonet) ran a worldwide MPLS  ISP

backbone with EIGRP.

Re: Can I use EIGRP as a MPLS Backbone IGP

It doesn't  have any probs if its ur IGP in the MPLS cloud..

Primary purpose of IGP in MPLS cloud is that every MPLS router should have routes for label switching...

and this objective can be acheived by any IGP, as far as scaling is not your main concern...

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