LevelOne GSW-4876 - Manual (Page 150)

C HAPTER 4 | Configuring the Switch
IGMP Snooping
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When a multicast host leaves a group, it sends an IGMP leave message.
When the leave message is received by the switch, it checks to see if
this host is the last to leave the group by sending out an IGMP group-
specific or group-and-source-specific query message, and starts a
timer. If no reports are received before the timer expires, the group
record is deleted, and a report is sent to the upstream multicast router.
A reduced value will result in reduced time to detect the loss of the last
member of a group or source, but may generate more burst traffic.
This attribute will take effect only if IGMP snooping proxy reporting is
enabled (see page 151 ).
◆ URI - The Unsolicited Report Interval specifies how often the upstream
interface should transmit unsolicited IGMP reports when report
suppression/proxy reporting is enabled. (Range: 0-31744 seconds,
Default: 1 second)
W EB I NTERFACE
To configure VLAN settings for IGMP snooping and query:
1. Click Configuration, IPMC, IGMP Snooping, VLAN Configuration.
2. Adjust the IGMP settings as required.
3. Click Save.
Figure 56: Configuring VLAN Settings for IGMP Snooping and Query
C ONFIGURING IGMP
F ILTERING
Use the IGMP Snooping Port Group Filtering Configuration page to filter
specific multicast traffic. In certain switch applications, the administrator
may want to control the multicast services that are available to end users;
for example, an IP/TV service based on a specific subscription plan. The
IGMP filtering feature fulfills this requirement by denying access to
specified multicast services on a switch port.
P ATH
Advanced Configuration, IPMC, IGMP Snooping, Port Group Filtering
P ARAMETERS
These parameters are displayed:
◆ Port – Port identifier.