SMC Networks SMC6724L3 manual Multicast Routing, 218

CONFIGURING THE SWITCH

Web - Click Routing Protocol, OSPF, Neighbor Information.

CLI - This shows a designated router and backup designated router as neighbors.

Console#show ip	ospf neighbor		4-282
ID	Pri	State	Address
---------------	------ ---------------- ---------------
10.2.44.5	1	FULL/DR	10.2.44.88
10.2.44.6	2	FULL/BDR	10.2.44.88

Console#

Multicast Routing

This router can route multicast traffic to different subnetworks using either Distance Vector Multicast Routing Protocol (DVMRP) or Protocol-Independent Multicasting - Dense Mode (PIM-DM). These protocols flood multicast traffic downstream, and calculate the shortest-path, source-rooted delivery tree between each source and destination host group. They also rely on messages sent from IGMP-enabled Layer 2 switches and hosts to determine when hosts want to join or leave multicast groups.

DVMRP builds a source-rooted multicast delivery tree that allows it to prevent looping and determine the shortest path to the source of the multicast traffic. PIM also builds a source-rooted multicast delivery tree for each multicast source, but uses information from the router’s unicast routing table instead of maintaining its own multicast routing table, making

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