D-Link xStack DGS-3120 Series Reference Guide

xStack® DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch Web UI Reference Guide
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Figure 4-77 MLD Snooping Parameters Settings window (EI and SI Mode Only)
The fields that can be configured are described below:
Parameter Description
Query Interval (1-65535)
Specify the amount of time in seconds between general query transmissions. The
default setting is 125 seconds.
Max Response Time (1-
25)
The maximum time in seconds to wait for reports from listeners. The default setting
is 10 seconds.
Robustness Value (1-7)
Provides fine-tuning to allow for expected packet loss on a subnet. The value of the
robustness variable is used in calculating the following MLD message intervals:
Group listener interval - Amount of time that must pass before a multicast router
decides there are no more listeners of a group on a network.
Other Querier present interval - Amount of time that must pass before a multicast
router decides that there is no longer another multicast router that is the Querier.
Last listener query count - Number of group-specific queries sent before the router
assumes there are no local listeners of a group. The default number is the value of
the robustness variable.
By default, the robustness variable is set to 2. You might want to increase this
value if you expect a subnet to be loosely.
Last Listener Query
Interval (1-25)
The maximum amount of time between group-specific query messages, including
those sent in response to done-group messages. You might lower this interval to
reduce the amount of time it takes a router to detect the loss of the last listener of a
group.
Data Driven Group
Expiry Time (1-65535)
Enter the data driven group expiry time value. (EI and SI Mode Only)
Proxy Reporting Source
IP
Enter the source IP of proxy reporting integrated report.
Proxy Reporting State
Use the drop-down menu to enable or disable the proxy reporting.
Querier State
This allows the switch to be specified as an MLD Querier (sends MLD query
packets) or a Non-Querier (does not send MLD query packets). Set to enable or
disable.
Fast Done
Here the user can enable or disable the fast done feature.
State
Used to enable or disable MLD snooping for the specified VLAN. This field is
Disabled by default.
Data Driven Learning
State
Enable or disable data driven learning of MLD snooping groups. (EI and SI Mode
Only)
Data Driven Learning
Aged Out
Enable or disable the age out function for data driven entries. (EI and SI Mode
Only)

D-Link xStack DGS-3120 Series Specifications

General

MAC Address Table	16K entries
Ports	10/100/1000BASE-T ports
VLANs	4094
Jumbo Frame	Up to 9KB
Power Supply	Internal power supply (depending on model)
Power over Ethernet (PoE)	No
Layer 3 Features	RIP
Quality of Service (QoS)	8 queues per port, DiffServ
Security Features	ACLs
Management	Web-based, CLI, SNMP
Operating Temperature	0°C to 40°C
Storage Temperature	-40°C to 70°C
SFP Ports	Combo 10/100/1000BASE-T/SFP ports and/or dedicated SFP/SFP+ ports (depending on model)