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Syntax: multicast fast-convergence
IGMP snooping show commands
This section describes the show commands for IGMP snooping.
Displaying the IGMP snooping configuration
To display the global IGMP snooping configuration, enter the show ip multicast command at any
level of the CLI.
device#show ip multicast
Summary of all vlans. Please use "sh ip mu vlan vlan-id" for details
Version=2, Intervals: Query=125, Group Age=260, Max Resp=10, Other Qr=260
VL10: cfg V3, vlan cfg passive, , pimsm (vlan cfg), 1 grp, 0 (SG) cache, no rtr port
To display the IGMP snooping information for a specific VLAN, enter the following command.
device#show ip multicast vlan 10
Version=3, Intervals: Query=10, Group Age=260, Max Resp=10, Other Qr=30
VL10: cfg V3, vlan cfg passive, , pimsm (vlan cfg), 3 grp, 1 (SG) cache, no rtr port,
e2 has 3 groups, non-QR (passive), default V3
**** Warning! has V2 client (life=240),
group: 239.0.0.3, life = 240
group: 224.1.1.2, life = 240
group: 224.1.1.1, life = 240
e4 has 0 groups, non-QR (passive), default V3
Syntax: show ip multicast vlan vlan-id
If you do not specify a vlan-id , information for all VLANs is displayed.
The following table describes the information displayed by the show ip multicast vlan command.
Field Description
Version The global IGMP version. In this example, the device is configured for IGMP version 2.
Query How often a querier sends a general query on the interface. In this example, the general queries are
sent every 125 seconds.
Group Age The number of seconds membership groups can be members of this group before aging out.
Max Resp The maximum number of seconds a client waits before replying to a query.
Other Qr How long it took a switch with a lower IP address to become a new querier. This value is 2 x Query +
Max Resp.
cfg The IGMP version for the specified VLAN. In this example, VL10: cfg V3 indicates that VLAN 10 is
configured for IGMP V3.
vlan cfg The IGMP configuration mode, which is either passive or active.
pimsm Indicates that PIM SM is enabled on the VLAN.
IGMP snooping show commands
26 FastIron Ethernet Switch IP Multicast Configuration Guide
53-1003085-02