Bala, Many of the larger service providers have already rolled out MPLS in their networks to perform IP Traffic Engineering. A very short list includes UUNET (in Europe), Global Crossing, and British Telecom. The secondary usage for MPLS is to establish network-based virtual private network services in which MPLS is used to create tunnels (or closed user groups) across IP networks. AT&T is already offering a service based on this approach (IP Enabled Frame Relay). Other service providers are looking at rolling out MPLS-based VPN services in the next year. In terms of multi-vendor MPLS deployments, most of the early deployments have been in Cisco/Juniper environments. As such, RSVP-TE is the protocol of choice for MPLS Traffic Engineering and label switch path creation. For additional information, please feel free to visit my web site, the MPLS Resource Center at www.mplsrc.com. There is a very active discussion list on MPLS operational issues that you might want to join. We also have an MPLS FAQ that addresses many of your questions. irwin -----Original Message----- From: Bala Rajagopalan [mailto:BRaja@tellium.com] Sent: Thursday, January 11, 2001 5:12 PM To: 'nanog@merit.edu' Subject: MPLS deployment Hello, I am trying to get some information on the extent to which MPLS has been deployed in ISP networks. Specifically, - what's the largest MPLS deployment (in terms of size of the network)? - what's the largest multi-vendor MPLS deployment? - what's the status of MPLS-based TE? is it being used now? Thanks in advance. Bala Rajagopalan Tellium, Inc. 2 Crescent Place P.O. Box 901 Oceanport, NJ 07757-0901 Tel: (732) 923-4237 Fax: (732) 923-9804 Email: braja@tellium.com