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Cisco Systems' Tag Switching Architecture Overview (RFC2105)

IP.com Disclosure Number: IPCOM000002659D
Original Publication Date: 1997-Feb-01
Included in the Prior Art Database: 2019-Feb-15
Document File: 13 page(s) / 19K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

Y. Rekhter: AUTHOR [+4]

Related Documents

10.17487/RFC2105: DOI

Abstract

This document provides an overview of a novel approach to network layer packet forwarding, called tag switching. The two main components of the tag switching architecture - forwarding and control - are described. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 11% of the total text.

Network Working Group Y. Rekhter Request for Comments: 2105 B. Davie Category: Informational D. Katz E. Rosen G. Swallow Cisco Systems, Inc. February 1997

Cisco Systems’ Tag Switching Architecture Overview

Status of this Memo

This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

IESG Note:

This protocol is NOT the product of an IETF working group nor is it a standards track document. It has not necessarily benefited from the widespread and in depth community review that standards track documents receive.

Abstract

This document provides an overview of a novel approach to network layer packet forwarding, called tag switching. The two main components of the tag switching architecture - forwarding and control - are described. Forwarding is accomplished using simple label-swapping techniques, while the existing network layer routing protocols plus mechanisms for binding and distributing tags are used for control. Tag switching can retain the scaling properties of IP, and can help improve the scalability of IP networks. While tag switching does not rely on ATM, it can straightforwardly be applied to ATM switches. A range of tag switching applications and deployment scenarios are described.

Table of Contents

1 Introduction ........................................... 2 2 Tag Switching components ............................... 3 3 Forwarding component ................................... 3 3.1 Tag encapsulation ...................................... 4 4 Control component ...................................... 4 4.1 Destination-based routing .............................. 5 4.2 Hierarchy of routing knowledge ......................... 7 4.3 Multicast .............................................. 8

Rekhter, et. al. Informational [Page 1]

RFC 2105 Cisco’s Tag Switching Architecture February 1997

4.4 Flexible routing (explicit routes) ..................... 9 5 Tag switching with ATM ................................. 9 6 Quality of service ..................................... 11 7 Tag switching migration strategies ..................... 11 8 Summary ................................................ 12 9 Security Considerations ................................ 12 10 Intellectual Property Considerations ................... 12 11 Acknowledgments ........................................ 12 12 Authors’ Addresses ..................................... 13

1. Introduction

Continuous growth of the Internet demands higher bandwidth within the Internet Service Providers (ISPs). However, growth of the Internet is not the only driving factor for higher bandwidth - demand for higher bandwidth also comes from emerging multimedia applications. Demand for higher bandwidth, in turn, requires higher forwarding performance (packets per second) by routers, for both multicast and unicast traffic.

The growth of the Internet also demands improved scaling properties of the Inte...

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