R3721-F3210-F3171-HP High-End Firewalls Network Management Command Reference-6PW101

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Default level
2: System level
Parameters
None
Description
Use igmp require-router-alert to configure the interface to discard IGMP messages that do not carry the
Router-Alert option.
Use undo igmp require-router-alert to restore the default.
By default, the device does not check the Router-Alert option. Namely, it passes all the IGMP messages
that it receives to the upper layer protocol for processing.
Related commands: igmp send-router-alert and require-router-alert.
Examples
# Configure GigabitEthernet 0/1 to discard IGMP messages that do not carry the Router-Alert option.
<Sysname> system-view
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] igmp require-router-alert
igmp robust-count
Syntax
igmp robust-count robust-value
undo igmp robust-count
View
Interface view
Default level
2: System level
Parameters
robust-value: IGMP querier's robustness variable, with an effective range of 2 to 5.
Description
Use igmp robust-count to configure the IGMP querier's robustness variable on the current interface.
Use undo igmp robust-count to restore the default.
By default, the IGMP querier's robustness variable is 2.
The IGMP querier's robustness variable defines the maximum number of attempts for transmitting IGMP
general queries, group-specific queries or group-and-source-specific queries in case of packet loss due to
network problems. A greater value of the robustness variable makes the IGMP querier "more robust", but
results in a longer multicast group timeout time.
The IGMP querier's robustness variable determines the following values:
• The default number of general queries the IGMPv1/v2/v3 querier sends on startup
• The number of IGMP group-specific queries the IGMPv2 querier sends after receiving an IGMP
leave message.