--- 1/draft-ietf-mpls-ldp-applic-01.txt 2006-02-05 00:40:07.000000000 +0100 +++ 2/draft-ietf-mpls-ldp-applic-02.txt 2006-02-05 00:40:07.000000000 +0100 @@ -1,21 +1,21 @@ Network Working Group Bob Thomas Internet Draft Cisco Systems, Inc. -Expiration Date: December 2000 +Expiration Date: February 2001 Eric Gray Zaffire, Inc. - June 2000 + August 2000 LDP Applicability - draft-ietf-mpls-ldp-applic-01.txt + draft-ietf-mpls-ldp-applic-02.txt Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. @@ -28,30 +28,30 @@ The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Abstract Multiprotocol Label Switching (MPLS) is a method for forwarding packets that uses short, fixed-length values carried by packets, - called labels, to determine packet nexthops ([MPLS-FRAMEWORK], - [MPLS-ARCH]). A fundamental concept in MPLS is that two Label - Switching Routers (LSRs) must agree on the meaning of the labels used - to forward traffic between and through them. This common - understanding is achieved by using a set of procedures, called a - label distribution protocol, by which one LSR informs another of - label bindings it has made. This document describes the - applicability of a set of such procedures called LDP (for Label - Distribution Protocol) [LDP] by which LSRs distribute labels to - support MPLS forwarding along normally routed paths. + called labels, to determine packet nexthops [MPLS-ARCH]). A + fundamental concept in MPLS is that two Label Switching Routers + (LSRs) must agree on the meaning of the labels used to forward + traffic between and through them. This common understanding is + achieved by using a set of procedures, called a label distribution + protocol, by which one LSR informs another of label bindings it has + made. This document describes the applicability of a set of such + procedures called LDP (for Label Distribution Protocol) [LDP] by + which LSRs distribute labels to support MPLS forwarding along + normally routed paths. 1. LDP Applicability A label distribution protocol is a set of procedures by which one Label Switching Router (LSR) informs another of the meaning of labels used to forward traffic between and through them. The MPLS architecture allows for the possibility of more than a single method for distributing labels, and a number of different label distribution protocols are being standardized. Existing @@ -205,34 +205,30 @@ 5. Security Considerations LDP defines the optional use of the TCP MD5 Signature Option to protect against the introduction of spoofed TCP segments into LDP session connection streams. LDP use of the TCP MD5 Signature Option is similar to BGP [RFC1771] use of the option specified in [RFC2385]. 6. References - CRLDP-AS] J. Ash, M. Girish, E. Gray, B. Jamoussi, G. Wright, + [CRLDP-AS] J. Ash, M. Girish, E. Gray, B. Jamoussi, G. Wright, "Applicability Statement for CR-LDP", Work in Progress, September 1999. [LDP] L. Andersson, P. Doolan, N. Feldman, A. Fredette, B. Thomas, "LDP Specification", Work in Progress, June 2000. [MPLS-ARCH] E. Rosen, A. Viswanathan, R. Callon, "Multiprotocol Label Switching Architecture", Work in Progress, August 1999. - [MPLS-FRAMEWORK] R. Callon, P. Doolan, N. Feldman, A. Fredette, G. - Swallow, A. Viswanathan, "A Framework for Multiprotocol Label - Switching", Work in Progress, September 1999. - [RFC1771] Y. Rekhter, T. Li, "A Border Gateway Protocol 4 (BGP-4)", RFC 1771, March 1995. [RFC2026] S. Bradner, "The Internet Standards Process -- Revision 3", RFC 2026, October 1996. [RFC2385] A. Heffernan, "Protection of BGP Sessions via the TCP MD5 Signature Option", RFC 2385, August 1998. [RFC2547] E. Rosen, Y. Rekhter, "BGP/MPLS VPNs", RFC 2547, March