User's Manual

46-17
Catalyst 3750 Switch Software Configuration Guide
OL-8550-09
Chapter 46 Configuring IP Multicast Routing
Configuring IP Multicast Routing
Configuring SSM
Beginning in privileged EXEC mode, follow these steps to configure SSM:
Monitoring SSM
Beginning in privileged EXEC mode, follow these steps to monitor SSM.
Configuring Source Specific Multicast Mapping
The Source Specific Multicast (SSM) mapping feature supports SSM transition when supporting SSM
on the end system is impossible or unwanted due to administrative or technical reasons. You can use
SSM mapping to leverage SSM for video delivery to legacy STBs that do not support IGMPv3 or for
applications that do not use the IGMPv3 host stack.
This section covers these topics:
• Configuration Guidelines, page 46-18
• SSM Mapping Overview, page 46-18
• Configuring SSM Mapping, page 46-20
• Monitoring SSM Mapping, page 46-22
Command Purpose
Step 1
ip pim ssm [default | range access-list] Define the SSM range of IP multicast addresses.
Step 2
interface type number Select an interface that is connected to hosts on which IGMPv3
can be enabled, and enter the interface configuration mode.
Step 3
ip pim {sparse-mode | sparse-dense-mode} Enable PIM on an interface. You must use either sparse mode
or sparse-dense mode.
Step 4
ip igmp version 3 Enable IGMPv3 on this interface. The default version of IGMP
is set to Version 2.
Step 5
end Return to privileged EXEC mode.
Step 6
show running-config Verify your entries.
Step 7
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
show ip igmp groups detail Display the (S, G) channel subscription through IGMPv3.
show ip mroute Display whether a multicast group supports SSM service or whether a
source-specific host report was received.