Layer 3 Multicast Features; Distance Vector Multicast Routing Protocol; Internet Group Management Protocol; Igmp Proxy - Dell M6220 User Configuration Manual

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Table of Contents

Layer 3 Multicast Features

For information about configuring L3 multicast features, see "Managing IPv4

and IPv6 Multicast" on page 1177.

Distance Vector Multicast Routing Protocol (DVMRP) exchanges probe

packets with all DVMRP-enabled routers, establishing two way neighboring

relationships and building a neighbor table. It exchanges report packets and

creates a unicast topology table, which is used to build the multicast routing

table. This multicast route table is then used to route the multicast packets.

The Internet Group Management Protocol (IGMP) is used by IPv4 systems

(hosts and routers) to report their IP multicast group memberships to any

neighboring multicast routers. PowerConnect M6220, M6348, M8024, and

M8024-k switches perform the "multicast router part" of the IGMP protocol,

which means it collects the membership information needed by the active

multicast router.

The IGMP Proxy feature allows the switch to act as a proxy for hosts by

sending IGMP host messages on behalf of the hosts that the switch

discovered through standard IGMP router interfaces.

Protocol Independent Multicast—Dense Mode

Protocol Independent Multicast (PIM) is a standard multicast routing

protocol that provides scalable inter-domain multicast routing across the

Internet, independent of the mechanisms provided by any particular unicast

routing protocol. The Protocol Independent Multicast-Dense Mode (PIM-

DM) protocol uses an existing Unicast routing table and a Join/Prune/Graft

mechanism to build a tree. PIM-DM creates source-based shortest-path

distribution trees, making use of reverse path forwarding (RPF).

Switch Features

M8024 M6348 M8024-k