PLANET WGS3-2820 - Manual (Page 280)

User’s Manual of WGS3-2820/WGS3-5220
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o Robustness - The robustness parameter for the selected interface. This variable allows tuning for the expected
packet loss on a subnet. If a subnet is expected to be lossy, the robustness variable may be increased. IGMP is
robust to (robustness variable-1) packet losses.
o Startup Query Interval - The interval at which startup queries are sent on the selected interface.
o Startup Query Count - The number of queries to be sent on startup.
o Last Member Query Interval - The last member query interval. The last member query interval is the maximum
response time inserted into group-specific queries sent in response to leave group messages, and is also the
amount of time between group-specific query messages. This value may be tuned to modify the leave latency of the
network. A reduced value results in reduced time to detect the loss of the last member of a group. This value is not
used for IGMP version 1.
o Last Member Query Count - The number of queries to be sent on receiving a leave group report.
Figure 4-6-59 IGMP Configuration Summary
o Querier - The address of the IGMP querier on the IP subnet to which the selected interface is attached.
o Querier Status - Indicates whether the selected interface is in querier or non querier mode.
o Querier Up Time - The time in seconds since the IGMP interface querier was last changed.
o Querier Expiry Time - The time in seconds remaining before the other querier present timer expires. If the local
system is the querier, this will be zero.
o Wrong Version Queries - The number of queries that have been received on the selected interface with an IGMP
version that does not match the IGMP version configured for the interface, over the lifetime of the entry. IGMP