Configuring PIM SSM Group Ranges

The source specific multicast service (SSM) simplifies PIM-SM by eliminating the RP and all protocols related to the RP. Single or multiple PIM SSM group address ranges can be configured.
IGMPv3 and PIM-SM must be enabled on any ports on which you want SSM to operate. When configuring a single SSM group range, the IP address and address mask are used. When configuring multiple SSM group ranges, an ACL is used.
  1. Enter global configuration mode. 
    device# configure terminal
  2. Enable PIM 
    device(config)# router pim
  3. To configure SSM group ranges, use one of the following choices.
    • Configure a single SSM group address. The IP address specifies the multicast address for the SSM address range. If this is not configured, the range will default to 232/8 as assigned by the Internet Assigned Numbers Authority (IANA) for use with SSM. 
      device(config-router-pim)# ssm-enable range 232.1.1.1/8
    • Configure multiple SSM group ranges using an ACL. In this example, PIM uses the group addresses allowed by the ACL range, as its PIM SSM range. You must configure the ACL before this step. 
      device(config-router-pim)# ssm-enable range acl-range
  4. To display information for PIM SSM group ranges including the ACL, use the show ip pim sparse command. 
    device(config-router-pim)# show ip pim sparse

Global PIM Sparse Mode Settings
  Maximum Mcache         : 16384       Current Count              : 3
  Hello interval         : 30          Neighbor timeout           : 105
  Join/Prune interval    : 60          Inactivity interval        : 180
  Hardware Drop Enabled  : Yes         Prune Wait Interval        : 3
  Bootstrap Msg interval : 60          Candidate-RP Msg interval  : 60
  Register Suppress Time : 60          Register Probe Time        : 10
  Register Stop Delay    : 10
  SSM Enabled            : Yes         SPT Threshold              : 1
  SSM Group Range        : 232.0.0.0/8
  Route Precedence       : uc-non-default uc-default mc-non-default mc-default
  Slow Path Disable All		: Yes									Slow Path Enable SSM 						:Yes
		Slow Path Filter Acl : acl
Parent topic: Source-Specific Multicast