C
ONFIGURING
THE
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looping and determine the shortest path to the source of this multicast
traffic.
When this router receives the multicast message, it checks its unicast
routing table to locate the port that provides the shortest path back to the
source. If that path passes through the same port on which the multicast
message was received, then this router records path information for the
concerned multicast group in its routing table and forwards the multicast
message on to adjacent routers, except for the port through which the
message arrived. This process eliminates potential loops from the tree and
ensures that the shortest path (in terms of hop count) is always used.
Configuring Global DVMRP Settings
DVMRP is used to route multicast traffic to nodes which have requested a
specific multicast service via IGMP. This router uses Reverse Path
Forwarding (RPF) to build a shortest-path delivery tree that begins at the
source and spreads out to reach group members through the network.
RPF uses three different techniques to dynamically reconfigure the
multicast spanning tree: broadcasting, pruning, and grafting.
source
branch
leaf
leaf
Summary of Contents for 8612XL3
Page 2: ......
Page 26: ...CONTENTS xxvi ...
Page 40: ...INTRODUCTION 1 14 ...
Page 69: ...BASIC CONFIGURATION 3 15 ...
Page 175: ...PORT CONFIGURATION 3 121 ...
Page 337: ...IP ROUTING 3 283 Web Click Routing Protocol RIP Statistics ...
Page 379: ...MULTICAST ROUTING 3 325 Command Usage ...
Page 396: ...CONFIGURING THE SWITCH 3 342 ...
Page 582: ...COMMAND LINE INTERFACE 4 186 ...
Page 806: ... 224 Command Mode Privileged Exec Example Console clear vrrp 1 interface 1 counters Console ...
Page 826: ... 6 ...
Page 828: ...TROUBLESHOOTING B 2 ...
Page 838: ...GLOSSARY Glossary 10 ...
Page 845: ......