Configuring Ssm; Configuring Ssm (Pim) - Cisco Nexus 7000 Series Configuration Manual

Configuring PIM and PIM6
Step 4

Configuring SSM

Source-Specific Multicast (SSM) is a multicast distribution mode where the software on the DR connected
to a receiver that is requesting data for a multicast source builds a shortest path tree (SPT) to that source.
On an IPv4 network, a host can request multicast data for a specific source only if it is running IGMPv3 and
the DR for that host is running IGMPv3. You will usually enable IGMPv3 when you configure an interface
for PIM in the SSM mode. For hosts running IGMPv1 or IGMPv2, you can configure a group to source
mapping using SSM translation. For more information, see Configuring IGMP and Configuring MLD.
You can configure the group range that is used by SSM by specifying values on the command line. By default,
the SSM group range for PIM is 232.0.0.0/8 and for PIM6 is FF3x/96.
You can specify a route-map policy name that lists the group prefixes to use with the match ip multicast
command.
Note
If you want to use the default SSM group range, you do not need to configure the SSM group range.

Configuring SSM (PIM)

Before you begin
Ensure that you have installed the Enterprise Services license and enabled PIM.
Procedure
Step 1
Step 2
Command or Action
copy running-config startup-config
Example:
switch(config-if)# copy running-config
startup-config
Command or Action
config t
Example:
switch# config t
switch(config)#
[no] ip pim ssm range { ip-prefix | none |
route-mappolicy-name }
Example:
switch(config)# ip pim ssm range
239.128.1.0/24
Example:
switch(config)# no ip pim ssm range none
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide
Purpose
(Optional) Saves configuration changes.
Purpose
Enters global configuration mode.
Configures up to four group ranges to be treated
in SSM mode. You can specify a route-map
policy name that lists the group prefixes to use
with the match ip multicast command. The
default range is 232.0.0.0/8. If the keyword
none is specified, all group ranges are removed.
The no option removes the specified prefix from
the SSM range, or removes the route-map
Configuring SSM
101