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RE: Tunneling MPLS over non-MPLS network

  • From: Doug Legge <Doug.Legge@BerkeleyGroup.co.uk>
  • Date: Tue, 19 Apr 2005 08:32:05 +0100
  • Resent-Date: Tue, 19 Apr 2005 04:02:52 -0400
  • X-Scanned-By: MIMEDefang 2.45
  • X-SEF-2724C71B-6699-4336-99C5-34E79D7D15E: 1

Garry,

There is quite a bit of info and some sample configs for MPLS over GRE:

Juniper:
MPLS LSPs can use GRE tunnels to cross routing areas, Autonomous Systems,
and ISPs. Bridging MPLS LSPs over an intervening IP domain is possible
without disrupting the outlying MPLS domain.

LSPs can reach any destination that the GRE tunnels can reach. MPLS
applications can be deployed without requiring all transit nodes to support
MPLS, or requiring all transit nodes to support the same label distribution
protocols (LDP or RSVP). If you use CSPF, you must configure OSPF or IS-IS
through the GRE tunnel. Traffic engineering is not supported over GRE
tunnels; for example, you cannot reserve bandwidth or set priority or
preemption.

For more information about GRE tunnels, see the JUNOS Internet Software
Configuration Guide: Interfaces and Class of Service.

http://www.juniper.net/techpubs/software/junos/junos53/swconfig53-mpls-apps/
html/mpls-signaled-config45.html

http://www.juniper.net/techpubs/software/junos/junos53/swconfig53-mpls-apps/
html/mpls-signaled-config46.html


Also various articles, whitepapers:
http://www.nanog.org/mtg-0402/pdf/townsley.pdf

http://www1.ietf.org/proceedings_new/04nov/slides/mpls-8/mpls8.ppt

http://www.watersprings.org/pub/id/draft-rekhter-mpls-over-gre-03.txt

http://www.cisco.com/en/US/about/ac123/ac114/ac173/Q1-05/tech_security.html


A search of the vendor sites (Cisco, Juniper, Riverstone etc) produces quite
a bit of info + IETF, NANOG, MPLSRC, MPLS & Frame-relay Alliance etc

http://www.ietf.org/internet-drafts/draft-ietf-l3vpn-gre-ip-2547-03.txt

Doug

-----Original Message-----
From: mpls-ops-request@mplsrc.com [mailto:mpls-ops-request@mplsrc.com] On
Behalf Of Garry Glendown
Sent: 19 April 2005 08:06
To: mpls-ops@mplsrc.com
Subject: [MPLS-OPS]: Tunneling MPLS over non-MPLS network

Hi,

I was wondering if there is a way to tunnel MPLS traffic over a non-MPLS
link? Hardware is Cisco routers, and link would have to account for an MTU
for 1500 or possibly less ...

Any idea?

Tnx, -gg

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