LDP Extension for Multi Topology Support

Document Type Replaced Internet-Draft (individual)
Authors Quintin Zhao  , Luyuan Fang  , Chao Zhou  , Lianyuan Li  , Ning So  , Raveendra Torvi 
Last updated 2012-01-04 (latest revision 2011-07-11)
Replaced by RFC 7307
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
plain text pdf htmlized bibtex
Stream WG state Call For Adoption By WG Issued
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-mpls-ldp-multi-topology
Consensus Boilerplate Unknown
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Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Multi-Topology (MT) routing is supported in IP through extension of IGP protocols, such as OSPF and IS-IS. Each route computed by OSPF or IS-IS is associated with a specific topology. Label Distribution Protocol (LDP) is used to distribute labels for FECs advertised by routing protocols. It is a natural requirement to extend LDP in order to make LDP be aware of MT and thus take advantage of MT based routing. This document describes options to extend the existing MPLS signalling protocol (LDP) for creating and maintaining Label Switching Paths (LSPs) in a Multi-Topology enviroment.


Quintin Zhao (qzhao@huawei.com)
Luyuan Fang (lufang@cisco.com)
Chao Zhou (czhou@cisco.com)
Lianyuan Li (lilianyuan@chinamobile.com)
Ning So (ning.so@verizonbusiness.com)
Raveendra Torvi (pratiravi@juniper.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)