Browse Prior Art Database

Cabletron's VlanHello Protocol Specification Version 4 (RFC2641)

IP.com Disclosure Number: IPCOM000003229D
Original Publication Date: 1999-Aug-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 17 page(s) / 19K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Hamilton: AUTHOR [+1]

Related Documents

10.17487/RFC2641: DOI

Abstract

The VlanHello protocol is part of the InterSwitch Message Protocol (ISMP) which provides interswitch communication between switches running Cabletron's SecureFast VLAN (SFVLAN) product. Switches use the VlanHello protocol to discover their neighboring switches and establish the topology of the switch fabric. This memo provides information for the Internet community.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 10% of the total text.

Network Working Group D. Hamilton Request for Comments: 2641 D. Ruffen Category: Informational Cabletron Systems Incorporated August 1999

Cabletron’s VlanHello Protocol Specification Version 4

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 (1999). All Rights Reserved.

Abstract

The VlanHello protocol is part of the InterSwitch Message Protocol (ISMP) which provides interswitch communication between switches running Cabletron’s SecureFast VLAN (SFVLAN) product. Switches use the VlanHello protocol to discover their neighboring switches and establish the topology of the switch fabric.

Table of Contents

1. Introduction...................................... 2 1.1 Data Conventions.............................. 2 2. VlanHello Protocol Operational Overview........... 2 2.1 Neighbor Discovery............................ 2 2.2 Port States................................... 3 2.3 Topology Events............................... 5 2.4 Timers........................................ 9 3. InterSwitch Message Protocol...................... 9 3.1 Frame Header.................................. 10 3.2 ISMP Packet Header............................ 11 3.3 ISMP Message Body............................. 12 4. Interswitch Keepalive Message..................... 13 5. Security Considerations........................... 16 6. References........................................ 16 7. Authors’ Addresses................................ 16 8. Full Copyright Statement.......................... 17

Hamilton & Ruffen Informational [Page 1]

RFC 2641 Cabletron’s VlanHello Protocol Version 4 August 1999

1. Introduction

This memo is being distributed to members of the Internet community in order to solicit reactions to the proposals contained herein. While the specification discussed here may not be directly relevant to the research problems of the Internet, it may be of interest to researchers and implementers.

1.1 Data Conventions

The methods used in this memo to describe and picture data adhere to the standards of Internet Protocol documentation [RFC1700], in particular:

The convention in the documentation of Internet Protocols is to express numbers in decimal and to picture data in "big-endian" order. That is, fields are described left to right, with the most significant octet on the left and the least significant octet on the right.

The order of transmission of the header and data described in this document is resolved to the octet level. Whenever a diagram shows a group of octets, the order of transmission of those octets is the normal order in which they are read in English.

Whenever an octet represents a numeric quantity the left most bit in the diagram is the high order or most significant bit. That is, the bit labeled 0 is the most significant bit.

Similarly, whenever a multi-octet field represents a...

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