LevelOne GTL-2691 - Manual (Page 1268)

C HAPTER 42 | Multicast Filtering Commands
IGMP (Layer 3)
– 1268 –
C OMMAND M ODE
Privileged Exec
C OMMAND U SAGE
To display information about multicast groups, IGMP must first be enabled
on the interface to which a group has been assigned using the ip igmp
command, and multicast routing must be enabled globally on the system
using the ip multicast-routing command.
E XAMPLE
The following shows options for displaying IGMP group information by
interface, group address, and static listing.
Console#show ip igmp groups
Group Address Interface VLAN Last Reporter Uptime Expire V1 Timer
--------------- --------------- --------------- -------- -------- --------
224.0.17.17 1 192.168.1.10 0:0:1 0:4:19 0:0:0
Console#show ip igmp groups 234.5.6.8
Group Address Interface VLAN Last Reporter Uptime Expire V1 Timer
--------------- --------------- --------------- -------- -------- --------
224.0.17.17 1 192.168.1.10 0:0:1 0:4:19 0:0:0
Console#show ip igmp groups interface vlan 1
Group Address Interface VLAN Last Reporter Uptime Expire V1 Timer
--------------- --------------- --------------- -------- -------- --------
224.0.17.17 1 192.168.1.10 0:0:1 0:4:19 0:0:0
Console#
Table 161: show ip igmp groups - display description
Field Description
Group Address
IP multicast group address with subscribers directly attached or
downstream from the switch.
Interface VLAN
The interface on the switch that has received traffic directed to the
multicast group address.
Last Reporter
The IP address of the source of the last membership report
received for this multicast group address on this interface.
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.)
This field displays “stopped” if the Group Mode is INCLUDE.
V1 Timer
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.
◆ 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.