Cisco Implementation Of Ip Multicast Routing - Cisco WS-C3550-12G Software Configuration Manual

Cisco Implementation of IP Multicast Routing

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For information on configuring the Multicast Source Discovery Protocol (MSDP), see
"Configuring MSDP."
When you are configuring multicast routing parameters for the switch, to allocate system resources
Note
to maximize the number of possible multicast routes allowed, you can use the sdm prefer routing
global configuration command to set the Switch Database Management feature to the routing
template. For more information on the SDM templates, see the
User-Selected Features" section on page
Cisco Implementation of IP Multicast Routing
The Cisco IOS software supports these protocols to implement IP multicast routing:
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Figure 24-1
Figure 24-1 IP Multicast Routing Protocols
Host
Catalyst 3550 Multilayer Switch Software Configuration Guide
24-2
Configuring Basic DVMRP Interoperability Features, page 24-43
Configuring Advanced DVMRP Interoperability Features, page 24-50
Monitoring and Maintaining IP Multicast Routing, page 24-57
Internet Group Management Protocol (IGMP) is used among hosts on a LAN and the routers (and
multilayer switches) on that LAN to track the multicast groups of which hosts are members.
Protocol-Independent Multicast (PIM) protocol is used among routers and multilayer switches to
track which multicast packets to forward to each other and to their directly connected LANs.
Distance Vector Multicast Routing Protocol (DVMRP) is used on the multicast backbone of the
Internet (MBONE). The Cisco IOS software supports PIM-to-DVMRP interaction.
Cisco Group Management Protocol (CGMP) is used on Cisco routers and multilayer switches
connected to Layer 2 Catalyst switches to perform tasks similar to those performed by IGMP.
shows where these protocols operate within the IP multicast environment.
Cisco Catalyst switch
CGMP
Host
IGMP
6-57.
(CGMP client)
PIM
Chapter 24 Configuring IP Multicast Routing
Chapter 25,
"Optimizing System Resources for
Internet
MBONE
DVMRP
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