Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

Configuring PIM-SSM with IGMPv2

• When an SSM map is in place and Dell EMC 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 EMC 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 same access list, as long as they use different source addresses.
• When an extended ACL is associated with this command, Dell EMC Networking OS displays an error message. If you apply an extended ACL before you create it, Dell EMC Networking OS accepts the configuration, but when the ACL is later defined, Dell EMC Networking OS ignores the ACL and the stated mapping has no effect.

To display the source to which a group is mapped, use the show ip igmp ssm-map [group] command. If you use the group option, the command displays the group-to-source mapping even if the group is not currently in the IGMP group table. If you do not specify the group option, the display is a list of groups currently in the IGMP group table that has a group-to-source mapping.

To display the list of sources mapped to a group currently in the IGMP group table, use the show ip igmp groups group detail command.

R1(conf)#do show run pim
!
ip pim rp-address 10.11.12.2 group-address 224.0.0.0/4
ip pim ssm-range ssm
R1(conf)#do show run acl
!
ip access-list standard map
seq 5 permit host 239.0.0.2
!
ip access-list standard ssm
  seq 5 permit host 239.0.0.2
R1(conf)#ip igmp ssm-map map 10.11.5.2
R1(conf)#do show ip igmp groups
Total Number of Groups: 2
IGMP Connected Group Membership
Group Address   Interface   Mode          Uptime    Expires  Last Reporter
239.0.0.2       Vlan 300    IGMPv2-Compat 00:00:07  Never    10.11.3.2
   Member Ports: Te 1/1
239.0.0.1 Vlan 400 INCLUDE 00:00:10 Never 10.11.4.2
R1(conf)#do show ip igmp ssm-map
IGMP Connected Group Membership
Group Address  Interface   Mode           Uptime    Expires  Last Reporter
239.0.0.2      Vlan 300    IGMPv2-Compat  00:00:36  Never    10.11.3.2
   Member Ports: Te 1/1
R1(conf)#do show ip igmp ssm-map 239.0.0.2
SSM Map Information
Group     : 239.0.0.2
Source(s) : 10.11.5.2
R1(conf)#do show ip igmp groups detail

Interface           Vlan 300
Group               239.0.0.2
Uptime              00:00:01
Expires             Never
Router mode         IGMPv2-Compat
Last reporter       10.11.3.2
Last reporter mode  IGMPv2
Last report         received Join
Group source        list
Source address      Uptime Expires
10.11.5.2 00:00:01  Never

Interface             Vlan 400
Group                 239.0.0.1
Uptime                00:00:05
Expires               Never
Router mode           INCLUDE
Last reporter         10.11.4.2
Last reporter mode    INCLUDE
Last report received  ALLOW
Group source list
Source address  Uptime    Expires
10.11.5.2       00:00:05  00:02:04
  Member Ports: Te 1/2