SMC Networks SMC6724L3 Bedienungsanleitung Seite 266

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Seitenansicht 265
C
ONFIGURING
THE
S
WITCH
3-218
Web - Click Routing Protocol, OSPF, Neighbor Information.
CLI - This shows a designated router and backup designated router as
neighbors.
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
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#
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