D-Link DGS-3208TG User Guide - Page 120

IGMP Status, Change, Current Vid 1..4094, IGMP Snooping, Age-out Timer, QueriesTX, Multicast Group

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Page 120 highlights

Gigabit Ethernet Switch User's Guide The Switch allows you to display a forwarding table containing Switch ports, source addresses, learned statuses, and VLAN ID numbers. IGMP Status The Monitor group's IGMP Status command lets you examine the operation of the Internet Group Management Protocol (IGMP). The Switch can recognize IGMP queries and reports sent between stations and an IGMP router. When enabled for IGMP snooping, the Switch can open or close a port to specific devices based on the IGMP messages sent from the device to the router or vice versa. Figure 7-50. Browse IGMP Status window This window displays the number of IGMP queries and reports for each active IP multicast group detected by the Switch. You can also view the current age-out timer as well as the IGMP snooping status. Enter the desired VLAN ID number in the Current Vid (1..4094) field and then click Change. The fields displayed are defined as follows: ♦ Current Vid (1..4094) Enter the desired VLAN ID number in this field and then click the Change button. ♦ IGMP Snooping Indicates whether IGMP snooping is Enabled or Disabled. ♦ Age-out Timer Displays the time the Switch waits between IGMP queries. ♦ Queries(TX) The number of IGMP requests sent by the switch. ♦ Queries(RX) The number of IGMP requests that have arrived at a switch port. A second table in the lower part of the window shows the following information: ♦ Multicast Group The Multicast IP address of the Multicast group being displayed. ♦ MAC Address The Multicast MAC address of the multicast group being displayed. ♦ Reports The number of notifications sent from each station to the IGMP host, signifying that the station is still (or wants to be) part of a multicast group. 108

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Gigabit Ethernet Switch User’s Guide
108
The Switch allows you to display a forwarding table containing Switch ports, source addresses, learned
statuses, and VLAN ID numbers.
IGMP Status
The Monitor group’s IGMP Status command lets you examine the operation of the Internet Group
Management Protocol (IGMP). The Switch can recognize IGMP queries and reports sent between stations and
an IGMP router. When enabled for IGMP snooping, the Switch can open or close a port to specific devices
based on the IGMP messages sent from the device to the router or vice versa.
Figure 7-50.
Browse IGMP Status window
This window displays the number of IGMP queries and reports for each active IP multicast group detected by
the Switch. You can also view the current age-out timer as well as the IGMP snooping status. Enter the
desired VLAN ID number in the Current Vid (1..4094) field and then click
Change
.
The fields displayed are defined as follows:
♦
Current Vid (1..4094)
Enter the desired VLAN ID number in this field and then click the
Change
button.
♦
IGMP Snooping
Indicates whether IGMP snooping is Enabled or Disabled.
♦
Age-out Timer
Displays the time the Switch waits between IGMP queries.
♦
Queries(TX)
The number of IGMP requests sent by the switch.
♦
Queries(RX)
The number of IGMP requests that have arrived at a switch port.
A second table in the lower part of the window shows the following information:
♦
Multicast Group
The Multicast IP address of the Multicast group being displayed.
♦
MAC Address
The Multicast MAC address of the multicast group being displayed.
♦
Reports
The number of notifications sent from each station to the IGMP host, signifying that the station
is still (or wants to be) part of a multicast group.