show igmpsnooping ssm entries

Use this command to display the source-specific multicast forwarding database (SSMFDB) built by IGMP snooping. SSM delivers multicast packets to receivers that originated from a source address specified by the receiver. SSM is only available with IGMPv3 and MLDv2.

Note: A given {Source, Group, VLAN} combination can have a few interfaces in Include mode and a few interfaces in Exclude mode. In such instances, two rows for the same {Source, Group, VLAN} combinations are displayed.
Format show igmpsnooping ssm entries
Mode Privileged EXEC

The following fields are displayed in the output of this command.

Field Description
VLAN The VLAN on which the entry is learned.
Group The IPv4 multicast group address.
Source The IPv4 source address.
Source Filter Mode The source filter mode (Include or Exclude) for the specified group.
Interfaces
  • If Source Filter Mode is Include, this field specifies the list of interfaces on which an incoming packet is forwarded if its source IP address is equal to the current entry’s Source, destination IP address is equal to the current entry’s Group, and the VLAN ID on which it arrived is the current entry’s VLAN.
  • If Source Filter Mode is Exclude, this field specifies the list of interfaces on which an incoming packet is forwarded if its source IP address is not equal to the current entry’s Source, destination IP address is equal to the current entry’s Group, and the VLAN ID on which it arrived is the current entry’s VLAN.

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