Multicast Router Discovery

Document Type Expired Internet-Draft (idmr WG)
Authors Brian Haberman  , Bradley Cain  , Bradley Cain  , Shantam Biswas  , Bradley Cain  , Brian Haberman  , Shantam Biswas  , Storigen Systems 
Last updated 2015-10-14 (latest revision 2003-01-08)
Stream Internet Engineering Task Force (IETF)
Expired & archived
plain text pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
Consensus Boilerplate Unknown
Telechat date
Responsible AD Bill Fenner
Send notices to <>, <>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The concept of IGMP snooping requires the ability to identify the location of multicast routers. Since IGMP (and MLD) snooping is not standardized, there are many mechanisms in use to identify the multicast routers. However, this scenario can lead to interoperability issues between multicast routers and layer-2 switches from different vendors. This document introduces a general mechanism that allows for the discovery of multicast routers. By introducing these new messages, snooping devices have a uniform means of identifying multicast routers without dependency on particular routing protocols. These messages may also be used to convey configuration parameters to all systems on a network. In addition, other devices that may need to discover multicast routers can utilize these messages.


Brian Haberman (
Bradley Cain (
Bradley Cain (
Shantam Biswas (
Bradley Cain (
Brian Haberman (
Shantam Biswas (
Storigen Systems (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)