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The individual fields on this screen are defined as follows:
Field Name
Description
Multicast Precedence
[Enable, Disable] When enabled, the lower the multicast, the IGMP packets will be put
higher in the queue.
Default Version
[1-3] Enter the supported IGMP version.
Query Interval
The interval at which the multicast router sends a query messages to hosts. Ex-
pressed in seconds.
If the number is below 128, the value is used directly. If the value is greater than 128,
it is interpreted as an exponent and mantissa.
Query Response Interval
Upon receiving a query packet, a host beings counting down seconds, from a random
number. When the timer expires, the host sends it’s report.
Enter a value for the maximum number of seconds for the range of random values a
host can pick to count down from. The value must be greater than the Query Interval.
If using IGMP v1, this value is fixed at 10 seconds.
Last Member Query Interval
Enter the maximum response time within which the host must respond to the Out of
Sequence query from the router. (Default = 1000ms)
IGMP uses this value when router receives and IGMPv2 Leave report indicating at
least one host wants to leave the group. Upon receiving the Leave report, the router
confirms the interface is not configured for IGMP Immediate Leave. If not, the router
sends the out-of-sequence query.
Robustness Value
[2-7] Enter the value representing the complexity of the query. The greater the value,
the more robust the query.
Maximum Multicast Groups
Maxim number of groups allowed.
Maximum Multicast Data Sources (for
IGMP v3)
[1-24] Maximum data sources allowed.
Maximum Multicast Group Members
The maximum number of multicast groups that can be joined on a port or group of
ports.
Fast leave
[Enabled, Disabled] If enabled, the IGMP proxy removes group member immediately
without sending a query.
LAN to LAN (Intra LAN) Multicast
Check this option to permit a multicast data source on the LAN side and IGMP
snooping enabled.
Membership Join Immediate (IPTV)
When enabled, clients do not send a join report and will have faster join at startup but
only by a few milliseconds.
