C H A P T E R 34 Configuring Ip Multicast Routing - Cisco Catalyst 3550 series Software Configuration Manual

Cisco Implementation of IP Multicast Routing
•
•
•
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 to
Note
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
Features" section on page
Cisco Implementation of IP Multicast Routing
The Cisco IOS software supports these protocols to implement IP multicast routing:
•
•
•
•
Figure 34-1
Figure 34-1 IP Multicast Routing Protocols
Host
Catalyst 3550 Multilayer Switch Software Configuration Guide
34-2
Configuring Basic DVMRP Interoperability Features, page 34-43
Configuring Advanced DVMRP Interoperability Features, page 34-50
Monitoring and Maintaining IP Multicast Routing, page 34-57
7-27.
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
"Optimizing System Resources for User-Selected
(CGMP client)
PIM
Chapter 34 Configuring IP Multicast Routing
Chapter 35,
Internet
MBONE
DVMRP
78-11194-09