Port Settings - Tripp Lite NGI-M08C4POE8-2 Owner's Manual

Enable on VLAN
Unknown Multicast
Packets

6.2.1.2 Port Settings

Immediate Leave
When you enable IGMP Immediate-Leave processing, the switch immediately removes a port
when it detects an IGMP version 2 leave message on that port. You should use the Immediate-
Leave feature only when there is a single receiver present on every port in the VLAN. (Immediate
Leave is only supported on IGMP Version 2 hosts).
The switch uses IGMP snooping Immediate Leave to remove from the forwarding table an
interface that sends a leave message without the switch sending group-specific queries to the
interface. The VLAN interface is pruned from the multicast tree for the multicast group specified
in the original leave message. Immediate Leave ensures optimal bandwidth management for all
hosts on a switched network, even when multiple multicast groups are simultaneously in use.
Without Immediate Leave, when the switch receives an IGMP leave message from a subscriber
on a receiver port, it sends out an IGMP specific query on that port and waits for IGMP group
membership reports. If no reports are received in a configured time period, the receiver port is
removed from multicast group membership.
Port IGMP Querier Mode
Auto:

The Switch uses the port as an IGMP query port if the port receives IGMP query packets.
Fixed:

The Switch always treats the port(s) as IGMP query port(s). This is for when connecting an
IGMP multicast server to the port(s). The Switch always forwards the client's report/leave
packets to the port.
Normally, the port is connected to an IGMP server.
Edge:

The Switch does not use the port as an IGMP query port. The IGMP query packets received
by this port will be dropped.
Normally, the port is connected to an IGMP client.
Note: The Switch will forward the IGMP join and leave packets to the query port.
This field displays VLANs on which the Switch is to perform
IGMP snooping. None displays if you have not enabled IGMP
snooping on any VLAN yet.
This field displays whether the Switch is set to drop or
flooding unknown multicast packets.
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