D-Link DGS-3700 Time Query Interval, Max Response, Robustness Value, 255, Last Member, Fast Leave

	DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
Time
Query Interval	The Query Interval field is used to set the time (in seconds) between transmitting IGMP
(1-65535)	queries. Entries between 1 and 65535 seconds are allowed. Default = 125.
Max Response	This determines the maximum amount of time in seconds allowed before sending an IGMP
Time	response report. The Max Response Time field allows an entry between 1 and 25 (seconds).
(1-25)	Default = 10.
Robustness Value	Adjust this variable according to expected packet loss. If packet loss on the VLAN is expected
(1-255)	to be high, the Robustness Variable should be increased to accommodate increased packet
	loss. This entry field allows an entry of 1 to 255. Default = 2.
Last Member	This field specifies the maximum amount of time between group-specific query messages,
Query Interval	including those sent in response to leave group messages. Default = 1.
(1-25 Sec)
Data Driven Group	Allows the user to set the time that an IGMP Snooping data driven learning group will expire for
Expiry Time (1-	the specified VLAN.
65535)
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 function will
	allow members of a multicast group to leave the group immediately (without the
	implementation of the Last Member Query Timer) when an IGMP Leave Report Packet is
	received by the Switch. The default is Disabled.
State	Select Enabled to implement IGMP Snooping. This field is Disabled by default.
Report	Select Enable or Disable for IGMP Snooping report suppression for specified VLANs.
Suppression
Data Driven	Allows users to enable or disable IGMP snooping data driven learning for the specified VLAN.
Learning State
Data Driven	Allows users to enable or disable aged_out of IGMP Snooping data driven learning for the
Learning Aged Out	specified VLAN.
Version	Allows the user to configure the IGMP version used on the Switch. The default value is 3.
Querier Role	This read-only field describes the behavior of the router for sending query packets. Querier will
	denote that the router is sending out IGMP query packets. Non-Querier will denote that the
	router is not sending out IGMP query packets. This field will 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 which will show the following window for the user to configure:

Figure 3 - 30 IGMP Snooping Router IP Settings – Edit window

93