Switching Commands
120
ProSAFE M7100 Managed Switches
show igmpsnooping ssm stats
This command displays the statistics of the IGMP snooping SSMFDB.
show mac-address-table igmpsnooping
This command displays the IGMP Snooping entries in the MFDB table.
IGMP Snooping Querier Commands
IGMP Snooping requires that one central switch or router periodically query all end-devices on
the network to announce their multicast memberships. This central device is the “IGMP Querier”.
The IGMP query responses, known as IGMP reports, keep the switch updated with the current
multicast group membership on a port-by-port basis. If the switch does not receive updated
membership information in a timely fashion, it will stop forwarding multicasts to the port where
the end device is located.
This section describes commands used to configure and display information about IGMP Snooping
Queriers on the ne
tw
ork and, separately, on VLANs.
set igmp querier
Use this command to enable IGMP Snooping Querier on the system, using Global Config mode, or
on a VLAN. Using this command, you can specify the IP Address that the Snooping Querier switch
should use as the source address while generating periodic queries.
If a VLAN has IGMP Snooping Querier enabled and IGMP Snooping is operationally disabled on it,
IGMP Snooping Querier functionalit
y is disabled on that VLAN. IGMP Snooping functionality is
reenabled if IGMP Snooping is operational on the VLAN.
Format show igmpsnooping ssm stats
Mode Privileged EXEC
Term Definition
Total Entries The total number of entries that potentially can be in the IGMP snooping SSMFDB.
Most SSMFDB
Entries Ev
er Used
The largest number of entries that have been present in the IGMP snooping SSMFDB.
Current Entries The current number of entries in the IGMP snooping SSMFDB.
Format show mac-address-table igmpsnooping
Mode Privileged EXEC
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