Configuring Igmp Query And Response Parameters - 3Com S7906E Configuration Manual

By default, for the consideration of compatibility, the device does not check the Router-Alert option,
namely it processes all the IGMP messages it received. In this case, IGMP messages are directly
passed to the upper layer protocol, no matter whether the IGMP messages carry the Router-Alert
option or not.
To enhance the device performance and avoid unnecessary costs, and also for the consideration
of protocol security, you can configure the device to discard IGMP messages that do not carry the
Router-Alert option.
Configuring IGMP packet options globally
Follow these steps to configure IGMP packet options globally:
To do...
Enter system view
Enter public instance IGMP
view or VPN instance IGMP
view
Configure the router to discard
any IGMP message that does
not carry the Router-Alert
option
Enable insertion of the
Router-Alert option into IGMP
messages
Configuring IGMP packet options on an interface
Follow these steps to configure IGMP packet options on an interface:
To do...
Enter system view
Enter interface view
Configure the interface to
discard any IGMP message
that does not carry the
Router-Alert option
Enable insertion of the
Router-Alert option into IGMP
messages

Configuring IGMP Query and Response Parameters

On startup, the IGMP querier sends "startup query count" IGMP general queries at the "startup query
interval", which is 1/4 of the "IGMP query interval".
The IGMP querier periodically sends IGMP general queries at the "IGMP query interval" to determine
whether any multicast group member exists on the network. You can tune the IGMP general query
interval based on actual condition of the network.
Use the command...
system-view
igmp [ vpn-instance
vpn-instance-name ]
require-router-alert
send-router-alert
Use the command...
system-view
interface interface-type
interface-number
igmp require-router-alert
igmp send-router-alert
1-13
Remarks
—
—
Optional
By default, the device does not
check the Router-Alert option.
Optional
By default, IGMP messages
carry the Router-Alert option.
Remarks
—
—
Optional
By default, the device does not
check the Router-Alert option.
Optional
By default, IGMP messages
carry the Router-Alert option.