R3102-R3103-HP 6600/HSR6600 Routers IP Multicast Command Reference

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Related commands
display mld ssm-mapping group
robust-count (MLD view)
Use robust-count to configure the MLD querier's robustness variable globally.
Use undo robust-count to restore the default.
Syntax
robust-count robust-value
undo robust-count
Default
The MLD querier's robustness variable is 2.
Views
MLD view
Default command level
2: System level
Parameters
robust-value: Specifies an MLD querier's robustness variable in the range of 2 to 5.
Usage guidelines
The MLD querier's robustness variable defines the maximum number of attempts for transmitting MLD
general queries, multicast-address-specific queries, or multicast-address-and-source-specific queries in
case of packet loss due to network problems. A greater value of the robustness variable makes the MLD
querier "more robust", but results in a longer IPv6 multicast group timeout time.
The MLD querier's robustness variable determines the following values:
• The default number of MLD general queries that the MLDv1/v2 querier sends on startup.
• The number of multicast-address-specific queries that the MLDv1 querier sends after receiving an
MLD done message.
• The number of multicast-address-and-source-specific queries that the MLDv2 querier sends after
receiving an MLD report that indicates relation changes between IPv6 multicast groups and IPv6
multicast sources.
Examples
# Set the MLD querier's robustness variable to 3 globally.
<Sysname> system-view
[Sysname] mld
[Sysname-mld] robust-count 3
Related commands
• display mld interface
• last-listener-query-interval
• mld robust-count
• startup-query-count