Black Box LGB6026A, Management Manual

Page: 971 / 1289

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C
HAPTER
41 | Multicast Filtering Commands
IGMP Snooping
ip igmp snooping
vlan last-memb-
query-intvl
This command configures the last-member-query interval. Use the no form
to restore the default.
S
YNTAX
ip igmp snooping vlan vlan-id last-memb-query-intvl interval
no ip igmp snooping vlan vlan-id last-memb-query-intvl
vlan-id - VLAN ID (Range: 1-4093)
interval - The interval to wait for a response to a group-specific or
group-and-source-specific query message. (Range: 1-31744 tenths
of a second)
D
EFAULT
S
ETTING
10 (1 second)
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
◆
When a multicast host leaves a group, it sends an IGMP leave message.
When the leave message is received by the switch, it checks to see if
this host is the last to leave the group by sending out an IGMP group-
specific or group-and-source-specific query message, and starts a
timer. If no reports are received before the timer expires, the group
record is deleted, and a report is sent to the upstream multicast router.
◆
A reduced value will result in reduced time to detect the loss of the last
member of a group or source, but may generate more bursty traffic.
◆
This command will take effect only if IGMP snooping proxy reporting is
enabled (
page 960 ).
E
XAMPLE
Console(config)#ip igmp snooping vlan 1 last-memb-query-intvl 700
Console(config)#
ip igmp snooping
vlan mrd
This command enables sending of multicast router solicitation messages.
Use the
no form to disable these messages.
S
YNTAX
[ no ] ip igmp snooping vlan vlan-id mrd
vlan-id - VLAN ID (Range: 1-4093)
D
EFAULT
S
ETTING
Enabled