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RFC 2547 support using multipoint GRE tunnels

  • From: Ravi Bhagavathula <ravi.bhagavathula@wichita.edu>
  • Date: Sat, 25 Jan 2003 16:55:41 -0600
  • Resent-Date: Sat, 25 Jan 2003 20:23:22 -0500
  • To: mpls-ops@mplsrc.com
  • X-EXP32-SerialNo: 00003023
  • X-WebMail-UserID: ravi.bhagavathula@wichita.edu

Hi,

I am trying to configure a simple network to illustrate the basic 
configuration of the dynamic layer-3 VPN (RFC 2547) support using Multipoint 
GRE tunnels on Cisco gear.

I have the following network configured (employing 7200s and GSRs).

gsrb -- vxra -- gsra -- vxrc -- vxrb

VXR-A and VXR-C are the two PE routers and I wish to bring connectivity 
between GSR-B and VXR-B using plain IP instead of MPLS for the VPN based on 
RFC 2547. I can see the vpnv4 information fine BEFORE I bring in the 
multipoint tunnel into picture. I am not quite sure what address to use for 
the tunnel interface since the documentation from Cisco does not clearly 
indicate which addresses to use.

Any help with an example configuration will be greatly appreciated.

Thanks a lot.

Ravi B
Wichita, KS

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