C
HAPTER
39
| Multicast Filtering Commands
IGMP Snooping
– 914 –
(The timeout for this release is currently defined by ip igmp snooping
vlan last-memb-query-intvl * ip igmp robustval.
â—† If immediate-leave is enabled, the switch assumes that only one host is
connected to the interface. Therefore, immediate leave should only be
enabled on an interface if it is connected to only one IGMP-enabled
device, either a service host or a neighbor running IGMP snooping.
â—† This command is only effective if IGMP snooping is enabled, and
IGMPv2 or IGMPv3 snooping is used.
EXAMPLE
The following shows how to enable immediate leave.
Console(config)#ip igmp snooping vlan 1 immediate-leave
Console(config)#
ip igmp snooping
vlan last-memb-
query-count
This command configures the number of IGMP proxy group-specific or
group-and-source-specific query messages that are sent out before the
system assumes there are no more local members. Use the no form to
restore the default.
SYNTAX
ip igmp snooping vlan vlan-id last-memb-query-count count
no ip igmp snooping vlan vlan-id last-memb-query-count
vlan-id - VLAN ID (Range: 1-4093)
count - The number of proxy group-specific or group-and-source-
specific query messages to issue before assuming that there are no
more group members. (Range: 1-255)
DEFAULT SETTING
2
COMMAND MODE
Global Configuration
COMMAND USAGE
This command will take effect only if IGMP snooping proxy reporting is
enabled (page 906).
EXAMPLE
Console(config)#ip igmp snooping vlan 1 last-memb-query-count 7
Console(config)#
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