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