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WG Review: Multicast & Anycast Group Membership (magma)
A new IETF working group has been proposed in the Internet
Area. The IESG has not made any determination as yet.
The following Description was submitted, and is provided for
informational purposes only:
Description of Working Group:
Group management protocols are crucial to the operation of both
multicast and anycast within the Internet. These protocols allow hosts
to inform routers of their membership status within groups. This
working group will be responsible for developing the functionalities
required for group membership reporting and other related actions. This
group will also address the initial authentication and access control
issues associated with anycast group membership; this is likely to be
limited to shared secrets and message authentication codes (MACs) much
like current routing protocol security. Other aspects of Anycast,
including architecture and routing, are outside the groups scope.
The draft names listed below are the starting point for the work in the
MAGMA specifications will include:
- Core IGMPv3/MLDv2 specifications. These specifications will describe
the protocol used between hosts and routers to share group membership
information. IGMPv3 and MLDv2 build on IGMPv2 and MLDv1 by adding
two types of source-specific filtering; "include" (in which the
system tells the router exactly which sources it desires) and
"exclude" (in which the system tells the router that it does *not*
desire a list of sources).
- IGMPv3: The IDMR working group has submitted this for Proposed
Standard. MAGMA takes ownership after publication as RFC.
- MLDv2: draft-vida-mld-v2-00.txt
- Multicast Source Filtering API. This specification describes the
API used to interact with IGMPv3 and MLDv2 to indicate source
- Host determination of network group membership. In a multicast
environment, systems may be interested in learning whether or not
there are any group members, in order to save the trouble of sending
data that nobody is listening to.
- Multicast Source Notification of Interest Protocol:
- Multicast forwarding in tree topologies using IGMP/MLD Proxying
Create a single document from:
- Source-Specific Multicast (SSM) consideration document. This work
will describe the use of IGMPv3/MLDv2 in an SSM environment.
- Considerations for "IGMP snooping" switches (switches that watch IGMP
exchanges in order to determine multicast forwarding behavior)
- Multicast Router Discovery: The IDMR working group has submitted
this for Proposed Standard. MAGMA takes ownership after publication
as an RFC.
- Snooping Considerations: draft-ietf-idmr-snoop-00.txt
- Group management MIBs
- update RFC 2933 for IGMPv3
- update RFC 3019 for MLDv2
- Interaction between IGMP/MLD and routing protocols
- Extensions to MLD supporting anycast group memberships including
authentication and access control mechanisms
In addition, this working group will coordinate with other IETF working
groups where multicast and anycast group management protocols are