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LDP Hello Cryptographic Authentication (RFC7349) Disclosure Number: IPCOM000238306D
Original Publication Date: 2014-Aug-01
Included in the Prior Art Database: 2014-Aug-15
Document File: 28 page(s) / 32K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

L. Zheng: AUTHOR [+2]


The Label Distribution Protocol (LDP) [RFC5036] sets up LDP sessions that run between LDP peers. The peers could either be directly connected at the link level or be multiple hops away. An LDP Label Switching Router (LSR) could either be configured with the identity of its peers or could discover them using LDP Hello messages. These messages are sent encapsulated in UDP addressed to "all routers on this subnet" or to a specific IP address. Periodic Hello messages are also used to maintain the relationship between LDP peers necessary to keep the LDP session active.

This text was extracted from an ASCII text file.
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Internet Engineering Task Force (IETF)                          L. Zheng Request for Comments: 7349                                       M. Chen Category: Standards Track                            Huawei Technologies ISSN: 2070-1721                                                M. Bhatia                                                           Ionos Networks                                                              August 2014

                  LDP Hello Cryptographic Authentication


   This document introduces a new optional Cryptographic Authentication    TLV that LDP can use to secure its Hello messages.  It secures the    Hello messages against spoofing attacks and some well-known attacks    against the IP header.  This document describes a mechanism to secure    the LDP Hello messages using Hashed Message Authentication Code    (HMAC) with the National Institute of Standards and Technology (NIST)    Secure Hash Standard family of algorithms.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this document.  Code Components extracted from this document must    include Simplified BSD License text as described in Section 4.e of    the Trust Legal Provisions and are provided without warranty as    described in the Simplified BSD License.

Zheng, et al.                Standards Track                    [Page 1]
 RFC 7349         LDP Hello Cryptographic Authentication      August 2014

 Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2

     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3

   2.  Cryptogra...