RFC 3035 (rfc3035) - Page 1 of 20
MPLS using LDP and ATM VC Switching
Alternative Format: Original Text Document
Network Working Group B. Davie
Request for Comments: 3035 J. Lawrence
Category: Standards Track K. McCloghrie
E. Rosen
G. Swallow
Cisco Systems, Inc.
Y. Rekhter
Juniper Networks
P. Doolan
Ennovate Networks, Inc.
January 2001
MPLS using LDP and ATM VC Switching
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract
The Multiprotocol Label Switching (MPLS) Architecture [1] discusses a
way in which Asynchronous Transfer Mode (ATM) switches may be used as
Label Switching Routers. The ATM switches run network layer routing
algorithms (such as Open Shortest Path First (OSPF), Intermediate
System to Intermediate System (IS-IS), etc.), and their data
forwarding is based on the results of these routing algorithms. No
ATM-specific routing or addressing is needed. ATM switches used in
this way are known as ATM-LSRs (Label Switching Routers).
This document extends and clarifies the relevant portions of [1] and
[2] by specifying in more detail the procedures which to be used when
distributing labels to or from ATM-LSRs, when those labels represent
Forwarding Equivalence Classes (FECs, see [1]) for which the routes
are determined on a hop-by-hop basis by network layer routing
algorithms.
This document also specifies the MPLS encapsulation to be used when
sending labeled packets to or from ATM-LSRs, and in that respect is a
companion document to [3].
Davie Standards Track