TP-Link Jetstream T1500G-8T User Manual page 241

Configuring Layer 2 Multicast
Downloaded from ManualsNet.com
Report Enable or disable Report Suppression for the VLAN.
Suppression
When enabled, the switch will only forward the first IGMP report message for
each multicast group to the IGMP querier and suppress subsequent IGMP report
messages for the same multicast group during one query interval. This feature
prevents duplicate report messages from being sent to the IGMP querier.
Member Port Specify the aging time of the member ports in the VLAN.
Aging Time
Once the switch receives an IGMP membership report message from a port,
the switch adds this port to the member port list of the corresponding multicast
group. Member ports that are learned in this way are called dynamic member
ports.
If the switch does not receive any IGMP membership report messages for a
specific multicast group from a dynamic member port, it will no longer consider
this port as a member port of this multicast group and delete it from the multicast
forwarding table.
Router Port Specify the aging time of the router ports in the VLAN.
Aging Time
Once the switch receives an IGMP general query message from a port, the switch
adds this port to the router port list. Router ports that are learned in this way are
called dynamic router ports.
If the switch does not receive any IGMP general query message from a dynamic
router port within the router port aging time, the switch will no longer consider this
port as a router port and delete it from the router port list.
Leave Time Specify the leave time for the VLAN.
When the switch receives a leave message from a port to leave a multicast group,
it will wait for a leave time before removing the port from the multicast group.
During the period, if the switch receives any report messages from the port, the
port will not be removed from the multicast group. Exceptions are as follows:
• If the member port ages out before the Leave Time ends and no report
messages are received, the port will be removed from the multicast group
once its Member Port Aging Time ends.
• The Leave Time mechanism will not take effect when Fast Leave takes effect.
A proper leave time value can avoid other hosts connecting to the same port of
the switch being mistakenly removed from the multicast group when only some of
them want to leave.
IGMP Snooping Enable or disable the IGMP Snooping Querier for the VLAN.
Querier
When enabled, the switch acts as an IGMP Snooping Querier for the hosts in
this VLAN. A querier periodically sends a general query on the network to solicit
membership information, and sends group-specific queries when it receives leave
messages from hosts.
Note:
To enable IGMP Snooping Querier for a VLAN, IGMP Snooping should be enabled
both globally and in the VLAN.
search engine
IGMP Snooping Configuration
User Guide 218