Configure PIM-SSMConfiguring PIM-SSM is a two-step process.1 Configure PIM-SSM.2 Enable PIM-SSM for a range of addresses.Related Configuration Tasks• Use PIM-SSM with IGMP Version 2 HostsEnabling PIM-SSMTo enable PIM-SSM, follow these steps.1 Create an ACL that uses permit rules to specify what range of addresses should use SSM.CONFIGURATION modeip access-list standard name2 Enter the ip pim ssm-range command and specify the ACL you created.CONFIGURATION modeip pim ssm-range acl-nameEnabling PIM-SSMTo display address ranges in the PIM-SSM range, use the show ip pim ssm-range command from EXEC Privilege mode.R1(conf)#do show run pim!ip pim rp-address 10.11.12.2 group-address 224.0.0.0/4ip pim ssm-range ssmR1(conf)#do show run acl!ip access-list standard ssmseq 5 permit host 239.0.0.2R1(conf)#do show ip pim ssm-rangeGroup Address / MaskLen239.0.0.2 / 32Use PIM-SSM with IGMP Version 2 HostsPIM-SSM requires receivers that support IGMP version 3. You can employ PIM-SSM even when receivers support only IGMP version 1 orversion 2 by translating (*,G) entries to (S,G) entries.Translate (*,G) entries to (S,G) entries using the ip igmp ssm-map acl command source from CONFIGURATION mode. In a standardaccess list, specify the groups or the group ranges that you want to map to a source. Then, specify the multicast source.• When an SSM map is in place and Dell Networking OS cannot find any matching access lists for a group, it continues to create (*,G)entries because there is an implicit deny for unspecified groups in the ACL.• When you remove the mapping configuration, Dell Networking OS removes the corresponding (S,G) states that it created and re-establishes the original (*,G) states.• You may enter multiple ssm-map commands for different access lists. You may also enter multiple ssm-map commands for the sameaccess list, as long as they use different source addresses.• When an extended ACL is associated with this command, Dell Networking OS displays an error message. If you apply an extended ACLbefore you create it, Dell Networking OS accepts the configuration, but when the ACL is later defined, Dell Networking OS ignores theACL and the stated mapping has no effect.PIM Source-Specific Mode (PIM-SSM) 689
