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Command Line Interface
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4
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#
Table 4-78 show ip igmp groups - display description
Field Description
GroupAddress 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.)