Ip Igmp Query-Holdtime - Allied Telesis AR2050V Command Reference Manual

IGMP IGMP S C
AND NOOPING OMMANDS
-
IP IGMP QUERY HOLDTIME

ip igmp query-holdtime

Overview This command sets the time that an IGMP Querier waits after receiving a query
solicitation before it sends an IGMP Query. IGMP General Query messages will not
be sent during the hold time interval.
Use the no variant of this command to return to the default query hold time
period.
ip igmp query-holdtime <interval>
Syntax
no ip igmp query-holdtime
Default By default the delay before sending IGMP General Query messages is 500
milliseconds.
Mode Interface Configuration for a VLAN or Eth interface.
Usage Use this command to configure a value for the IGMP query hold time in the current
network. IGMP Queries can be generated after receiving Query Solicitation (QS)
packets and there is a possibility of a DoS (Denial of Service) attack if a stream of
Query Solicitation (QS) packets are sent to the IGMP Querier, eliciting a rapid
stream of IGMP Queries. This command applies to interfaces on which the device
is acting as an IGMP Querier.
Use the
messages is required and IGMP general query messages are required. The ip igmp
query-holdtime command stops IGMP query messages during the configured
holdtime interval, so the rate of IGMP Queries that can be sent out of an interface
can be restricted.
See the
information about the Query Solicitation feature.
Examples To set the IGMP query holdtime to 900 ms for vlan20, use the following commands:
awplus#
awplus(config)#
awplus(config-if)#
To reset the IGMP query holdtime to the default (500 ms) for vlan10, use the
following commands:
awplus#
awplus(config)#
awplus(config-if)#
C613-50186-01 Rev B
Parameter Description
<interval>
Query interval value in milliseconds, in the range <100-5000>.
ip igmp query-interval
IGMP Feature Overview and Configuration Guide
configure terminal
interface vlan20
configure terminal
interface vlan10
Command Reference for AR2050V
AlliedWare Plus™ Operating System - Version 5.4.7-1.x
command when a delay for IGMP general query
ip igmp query-holdtime 900
no ip igmp query-holdtime
for introductory
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