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Cell Relay Retreat>MPLS-OPS Archive>month:2002-May> msg00205



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NAT for MPLS VPN

  • From: "Duane de Witt" <ddewitt@uis.co.za>
  • Date: Tue, 28 May 2002 17:33:06 +0200
  • Importance: Normal
  • Resent-Date: Tue, 28 May 2002 12:28:57 -0400
  • To: <mpls-ops@mplsrc.com>

While we are on the subject I need to configure something similar but have no idea how to go about it.

 

I have a Cisco network, currently with tag-switching running but with no VPN’s. I have a 7140 which is been used as the gateway for the network which has a link to a 7200 handling my internet connections. Currently the 7140 has a default route pointing to the internet router, this route is redistributed by BGP for the rest of my network.

 

When I add VPN’s with VRF’s I face a problem. I need the current default gateway to stay as is for the rest of the network, but I also need some kind of default gateway for the specific VRF and then I need to be able to get those packets out of the VPN and to the internet. I was planning on using the 7140 with some kind of NAT config with subinterfaces on the gateway within the VRF as the inside interface and then the interface connecting to the internet router as the outside interface. I don’t know how to get the packets out of the VRF and on to the internet router.

 

Has anyone got any ideas?

 

 

Regards

 

Duane de Witt

Siemens Business Services

Tel. +27 11 652 7613

Fax. +27 11 652 2018