From: Todd, Douglas M. (DTODD@PARTNERS.ORG)
Date: Thu Apr 12 2007 - 14:19:16 ART
Bob:
You may want to ping the nanog news group (ISP News group) they have a lot of
experience with these issues and may be a good resource for you.
http://www.nanog.org/
Douglas
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Bob.Barnes@thomson.com
Sent: Thursday, April 12, 2007 10:42 AM
To: ccielab@groupstudy.com
Subject: Issues using MPLS with a VPN back-up
Looking for a little help here...
We are implementing MPLS VPN with Verizon and would like to use standard ISP GRE
VPN tunnels as a back-up. We have tried OSPF with sham links and redistribution
into BGP. Now, we have a little twist. Our QC and Dev segments are addressed
11.0.0.0/8 and 12.0.0.0/8 respectively (something I inherited and it cannot be
re-addressed). The rest of our address space is private and is not having
issues using OSPF with the sham links. Now here are the issues we are having:
With OSPF the 11.0.0.0 and 12.0.0.0 addresses are not being installed on the
carrier router. With BGP redistribution, we are losing the dynamics of our GRE
VPN back-up.
Does anyone have experience with MPLS installations and advice on how we can
proceed? We would like to move away from using OSPF sham links because of
apparent scalability limitations. We have not tried using VRFs on the CE
routers to date. Is this the suggested direction?
My apologies for turning to the study group for suggestions. I have pinged
Cisco for suggestions as well but they have not been able to come up with a
suitable answer, yet. We have also worked closely with Verizon but their
engineers are stumped as well. I am looking for any resource that may have more
experience in this area.
Thanks!
Bob Barnes
Manager - Data Communications
Prometric
(443) 455-6529
bob.barnes@prometric.com
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