HP VPN Firewall Appliances Network Management Command Reference

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Usage guidelines
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 higher robustness variable makes the IGMP querier more robust, but results in
longer multicast group timeout time.
The IGMP querier's robustness variable determines the following values:
• The default number of general queries that the IGMPv1/v2/v3 querier sends on startup
• The number of IGMP group-specific queries that the IGMPv2 querier sends after receiving an IGMP
leave message
• The number of IGMP group-and-source-specific queries that the IGMPv3 querier sends after
receiving an IGMP report that indicates relation changes between IPv6 multicast groups and IPv6
multicast sources
Examples
# Set the IGMP querier's robustness variable to 3 globally on the public network.
<Sysname> system-view
[Sysname] igmp
[Sysname-igmp] robust-count 3
Related commands
• display igmp interface
• igmp robust-count
• last-member-query-interval
• startup-query-count
• timer other-querier-present
• timer query
send-router-alert (IGMP view)
Use send-router-alert to globally enable insertion of the Router-Alert option into IGMP messages to be
sent.
Use undo send-router-alert to globally disable insertion of the Router-Alert option into IGMP messages
to be sent.
Syntax
send-router-alert
undo send-router-alert
Default
An IGMP message carries the Router-Alert option.
Views
Public network IGMP view
Default command level
2: System level