DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
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Time
Query Interval
(1-65535) The Query Interval field is used to set the time (in seconds) between transm itting IGMP
queries. Entries between 1 and 65535 seconds are allowed. Default = 12 5.
Max Response
Time
(1-25)
This determines the maximum amount of time in seconds allowed before sending an IGM P
response report. The Max Response Time field allows an entry between 1 and 25 (sec onds).
Default = 10.
Robustness Value
(1-255) Adjust this variable according to expected packet loss. If packet loss on the VLAN is expec ted
to be high, the Robustness Variable should be increased to accommodate increased p acket
loss. This entry field allows an entry of 1 to 255. Default = 2.
Last Member
Query Interval
(1-25 Sec)
This field specifies the maximum amount of time between group-specific query messages ,
including those sent in response to leave group messages. Default = 1.
Data Driven Group
Expiry Time (1-
65535)
Allows the user to set the time that an IGMP Snooping data driven learning group will expire for
the specified VLAN.
Querier State Choose Enabled to enable transmitting IGMP Query packets or Disabled to disable. The
default is Disabled.
Fast Leave This parameter allows the user to enable the Fast Leave function. Enabled, this f unction will
allow members of a multicast group to leave the group immediately (without t he
implementation of the Last Member Query Timer) when an IGMP Leave Report Pack et is
received by the Switch. The default is Disabled.
State Select Enabled to implement IGMP Snooping. This field is Disabled by defau lt.
Report
Suppression Select Enable or Disable for IGMP Snooping report suppression for specified VL ANs.
Data Driven
Learning State Allows users to enable or disable IGMP snooping data driven learning for the specified VLAN.
Data Driven
Learning Aged Out Allows users to enable or disable aged_out of IGMP Snooping data driven lear ning for the
specified VLAN.
Version Allows the user to configure the IGMP version used on the Switch. T he default value is 3.
Querier Role This read-only field describes the behavior of the rou ter f or s ending qu er y pack ets. Q uerier will
denote that the router is sending out IGMP query pack ets. Non-Querier will denote that the
router is not sending out IGMP query packets. This field wil l only read Querier when the
Querier State and the State fields have been Enabled.
To modify the IGMP Snooping Router IP Settings click on the hyperlinked Modify Router Port whic h will show the
following window for the user to configure:
Figure 3 - 30 IGMP Snooping Router IP Settings – Edit window