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3. To create or remove exceptions in the Group Exception List table, follow the instructions in Managing group exception
lists.
4. Click Apply/Save to save and apply the settings.
Field Name Description
Source Specific Mult-
icast
Select whether a specific multicast source is used. Options are Disable and Enable. The default is Dis-
able.
Multicast Precedence Select whether IGMP packets are given priority handling and at what level. Options are:
l Enable: IGMP packets are prioritized using the multicast precedence value. The lower the
multicast precedence value, the higher that IGMP packets will be placed in the queue.
l Disable: IGMP packets are not prioritized. This is the default.
Multicast Strict Group-
ing Enforcement
Select whether to enforce strict key management rules. Options are Enable and Disable. The default
is Disable.
IGMP Configuration and MLD Configuration sections
Default Version Enter the supported IGMP version. Options are 1 - 3.
Query Interval Enter the interval at which the multicast router sends a query messages to hosts, expressed in
seconds.
If you enter a number below 128, the value is used directly. If you enter a number above 128, it is
interpreted as an exponent and mantissa.
Query Response Inter-
val
Upon receiving a query packet, a host begins counting down seconds, from a random number. When
the timer expires, the host sends its report.
Enter the maximum number of seconds that a host can pick to count down from.
Robustness Interval (Applies to IGMP configuration only) Enter the maximum response time within which the host must
respond to the Out of Sequence query from the router. The default is 10 seconds.
Last Member Query
Interval
(Applies to MLD configuration only) Enter the maximum response time within which the host must
respond to the Out of Sequence query from the router. The default is 10s.
IGMP uses this value when the router receives an IGMPv2 Leave report indicating at least one host
wants to leave the group. Upon receiving the Leave report, the router verifies whether the interface
is configured for IGMP Immediate Leave. If not, the router sends the out-of-sequence query.
Robustness Value Enter the value representing the complexity of the query. The greater the value, the more robust
the query. Options are 2 - 7.
Maximum Multicast
Groups
Enter the maximum number of groups allowed. The default is 25 for IGMP and 10 for MLD.
Maximum Multicast Data
Sources (for IGMPv3)
Enter the maximum number of data sources allowed. Options are 1 - 24.
Maximum Multicast
Group Members
Enter the maximum number of multicast groups that can be joined on a port or group of ports.
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