Reference Guide

Table Of Contents
Format show igmpsnooping mrouter interface unit/slot/port
Mode Privileged EXEC
Column Meaning
Interface The port on which multicast router information is being displayed.
Multicast Router Attached Whether multicast router is statically enabled on the interface.
VLAN ID The list of VLANs of which the interface is a member.
show igmpsnooping mrouter vlan
This command displays information about statically configured ports.
Format show igmpsnooping mrouter vlan unit/slot/port
Mode Privileged EXEC
Column Meaning
Interface The port on which multicast router information is being displayed.
VLAN ID The list of VLANs of which the interface is a member.
show mac-address-table igmpsnooping
This command displays the IGMP Snooping entries in the MFDB table.
Format
show mac-address-table igmpsnooping
Mode Privileged EXEC
Column Meaning
VLAN ID The VLAN in which the MAC address is learned.
MAC Address A multicast MAC address for which the switch has forwarding or filtering information. The format is
6 two-digit hexadecimal numbers that are separated by colons, for example 01:23:45:67:89:AB.
Type The type of the entry, which is either static (added by the user) or dynamic (added to the table as a
result of a learning process or protocol).
Description The text description of this multicast table entry.
Interfaces The list of interfaces that are designated for forwarding (Fwd:) and filtering (Flt:).
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.
Switching Commands
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