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M
ULTICAST
F
ILTERING
C
OMMANDS
-115
Command Mode
Normal Exec, Privileged Exec
Command Usage
• This command displays information for multicast groups learned via
IGMP, not static groups.
• If the switch receives an IGMP Version 1 Membership Report, it sets
a timer to note that there are Version 1 hosts present which are
members of the group for which it heard the report.
• If there are Version 1 hosts present for a particular group, the switch
will ignore any Leave Group messages that it receives for that group.
Example
The following shows the IGMP groups currently active on VLAN 1:
Console#show ip igmp groups vlan 1
GroupAddress InterfaceVlan Lastreporter Uptime Expire V1Timer
--------------- --------------- --------------- -------- -------- ---------
234.5.6.8 1 10.1.5.19 7068 220 0
Console#
Field Description
GroupAddres
s
IP multicast group address with subscribers directly attached or
downstream from this switch.
InterfaceVlan The interface on this switch that has received traffic directed to the
multicast group address.
Lastreporter The IP address of the source of the last membership report received for this
multicast group address on this interface. If no membership report has
been received, this object has the value 0.0.0.0.
Uptime The time elapsed since this entry was created.
Expire The time remaining before this entry will be aged out. (The default is 260
seconds.)
V1Timer The time remaining until the switch assumes that there are no longer any
IGMP Version 1 members on the IP subnet attached to this interface. (The
default is 400 seconds.)