Network Working Group P. Christian
Request for Comments: 3147 Nortel Networks
Category: Informational July 2001
Generic Routing Encapsulation over CLNS Networks
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2001). All Rights Reserved.
Abstract
This document proposes a method for transporting an arbitrary
protocol over a CLNS (Connectionless Network Service) network using
GRE (Generic Routing Encapsulation). This may then be used as a
method to tunnel IPv4 or IPv6 over CLNS.
1. Introduction
RFC 2784 Generic Routing Encapsulation (GRE) [1] provides a standard
method for transporting one arbitrary network layer protocol over
another arbitrary network layer protocol.
RFC 1702 Generic Routing Encapsulation over IPv4 networks [2]
provides a standard method for transporting an arbitrary network
layer protocol over IPv4 using GRE.
However no standard method exists for transporting other network
layer protocols over CLNS. This causes lack of interoperability
between different vendors' products as they provide solutions to
migrate from CLNS networks to IP networks. This is a problem
specifically in, but not limited to, the context of management
networks for SONET and SDH networks elements.
Large networks exist for the purpose of providing management
communications for SONET and SDH network elements. Standards
Bellcore GR-253-CORE [3] and ITU-T G.784 [4] mandate that these
networks are based on CLNS.
Christian Informational