Black Box LGB1048A, User Manual

Page: 99 / 279

User Manual
Publication date: Feb., 2008
Revision A1
91
Parameter description:
IGMP snooping:
The switch supports two kinds of IGMP Snooping status, including
“Enable”, and “Disable”.
Disable:
Set “Disable” mode to disable IGMP Snooping function.
Default: Disable
Enable:
In “Enable” mode, IGMP snooping switch will gather the
Membership report message to update the database of the
Multicast table. By the way, this also reduces the unnecessary
multicast traffic.
Last Member Query Count :
When the switch receives a leave message from a host, it sends out a
MAC-based general query to determine if any other devices connected to
that port are interested in traffic for specific multicast group. Last member
query count is defined how many MAC-based general query should be
sent before removing the port from multicast group.
Query Time :
Define the maximum time to wait for IGMP report memberships on a
receiver port before removing the port from multicast group membership.
Fast Leave :
When Fast-Leave feature is enabled, the switch immediately removes a
port when it detects an IGMP leave message on that port.