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Cisco WAN moving to MPLS

Posted on 2010-08-31
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I am planning a project to move our current network from several p2p t1's to an MPLS network.  Some of the locations will be replacing our router with the MPLS router and some will have to keep both on site because of devices we have attached to our routers.

This is a Cisco network currently using EIGRP as the routing protocol and we have VLANS to separate the voice and data network.

The MPLS network is all Adtran equipment and will be using BGP as the routing protocol.

I have a couple questions while I'm starting to plan this out on the white board and I hope you can help.
- I'm pretty sure I know the answer to this, but, will I be able to redistribute the EIGRP to the BGP or vice versa to not have to change my network?  Since EIGRP is a proprietary Cisco protocol, is this a moot point?
- With our VLAN's, we have sub-interfaces with dot1q tagging on the Cisco routers, I'm pretty sure the managed Adtran routers will need to mimic this, correct?  Or will BGP be able to route the voice network (along with the tags) without an actual interface on it?

Those are the big ones to get me started, I am thinking I will need to change the network routing protocol (to OSPF maybe), then implement the MPLS and redistribute the OSPF into BGP..

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Question by:maxtexgr
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xephael earned 500 total points
ID: 33569344
You can redistribute most any IPv4 (or IPv6) route from EIGRP into BGP or vice versa.  If you have other protocols running they would need to be tunneled or encapsulated across the BGP routing area since BGP is only for IP.

If you have routers with sub-interfaces for VLANs the Adtrans would need to mimic the configuration.  Since you have pre-configured routers at each location it might be best to just leave them in place and hook them to the Adtran's provided by your carrier if possible.

I hope I've answered all of your questions sufficiently.  Please let me know if you have additional questions.
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by:maxtexgr
ID: 33734594
Thanks, that was exactly what needed to be done.
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