Browse Prior Art Database

Encapsulating MPLS in IP or Generic Routing Encapsulation (GRE) (RFC4023)

IP.com Disclosure Number: IPCOM000088365D
Original Publication Date: 2005-Mar-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 15 page(s) / 32K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

T. Worster: AUTHOR [+4]

Abstract

Various applications of MPLS make use of label stacks with multiple entries. In some cases, it is possible to replace the top label of the stack with an IP-based encapsulation, thereby enabling the application to run over networks that do not have MPLS enabled in their core routers. This document specifies two IP-based encapsulations: MPLS-in-IP and MPLS-in-GRE (Generic Routing Encapsulation). Each of these is applicable in some circumstances.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 9% of the total text.

Network Working Group                                         T. Worster

Request for Comments: 4023                                Motorola, Inc.

Category: Standards Track                                     Y. Rekhter

                                                  Juniper Networks, Inc.

                                                           E. Rosen, Ed.

                                                     Cisco Systems, Inc.

                                                              March 2005

    Encapsulating MPLS in IP or Generic Routing Encapsulation (GRE)

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 (2005).

Abstract

   Various applications of MPLS make use of label stacks with multiple

   entries.  In some cases, it is possible to replace the top label of

   the stack with an IP-based encapsulation, thereby enabling the

   application to run over networks that do not have MPLS enabled in

   their core routers.  This document specifies two IP-based

   encapsulations: MPLS-in-IP and MPLS-in-GRE (Generic Routing

   Encapsulation).  Each of these is applicable in some circumstances.

Worster, et al.             Standards Track                     [Page 1]

RFC 4023            Encapsulating MPLS in IP or GRE           March 2005

Table of Contents

   1.  Motivation  ..................................................  2

   2.  Specification of Requirements  ...............................  3

   3.  Encapsulation in IP  .........................................  3

   4.  Encapsulation in GRE  ........................................  4

   5.  Common Procedures  ...........................................  5

       5.1.  Preventing Fragmentation and Reassembly  ...............  5

       5.2.  TTL or Hop Limit  ......................................  6

       5.3.  Differentiated Services  ...............................  7

   6.  Applicability  ...............................................  7

   7.  IANA Considerations  .........................................  8

   8.  Security Considerations  .....................................  8

       8.1.  Securing the Tunnel with IPsec ....