Users Guide

970 Layer-2 Multicast Features
Configuring IGMP Snooping Querier
Use the following commands to configure IGMP snooping querier settings on
the switch and on VLANs.
ip igmp snooping vlan
vlan-id mcrtexpiretime
seconds
Specify the multicast router time-out value for to
associate with a VLAN. This command sets the number of
seconds to wait to age out an automatically-learned
multicast router port.
interface teX/Y/Z
switchport mode trunk ip
igmp snooping vlan vlan-
id mrouter
Identify an interface as an mrouter interface. IGMP
snooping floods all multicast in the VLAN until an
mrouter has either been detected or configured.
CTRL + Z Exit to Privileged Exec mode.
show ip igmp snooping
groups
Shows IGMP snooping configuration on all VLANs.
show ip igmp snooping
vlan vlan-id
View the IGMP snooping settings on the VLAN.
Command Purpose
configure Enter global configuration mode.
ip igmp snooping querier
[vlan vlan-id] [address
ip-address]
Enable the IGMP snooping querier on the switch or on
the VLAN specified with the vlan-id parameter.
Use the optional ip-address parameter to specify the IP
address that the snooping querier switch should use as the
source address when generating periodic queries.
ip igmp snooping querier
query-interval interval-
count
Set the IGMP snooping querier query interval time, which
is the amount of time in seconds that the switch waits
before sending another periodic query. The range is 1–
1800 seconds.
ip igmp snooping querier
timer expiry seconds
Set the IGMP snooping querier timer expiration period.
This is the time period, in seconds, that the switch
remains in non-querier mode after it has discovered that
there is a multicast querier in the network.
Command Purpose