Dell S4820T, Configuration Manual

Page: 749 / 1178

• 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 same access 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 ACL before you create it, Dell Networking OS accepts the
configuration, but when the ACL is later defined, Dell 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.
Configuring PIM-SSM with IGMPv2
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)#show ip igmp ssm-map
Interface Vlan 101
Group 226.0.0.0
Uptime 10:40:31
Expires Never
Router mode IGMPv2
Last reporter 110.0.101.22
Group SSM Mapped source list
Source address Expires
110.1.1.250 00:02:08
172.16.84.250 00:02:08
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)#show ip igmp groups detail
PIM Source-Specific Mode (PIM-SSM)
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