42
Click the
“Change”
button to apply the changes. The modified changes will apply to the
VLAN table immediately.
2.5.4 IGMP Control
IGMP Snooping is the process of listening to IGMP traffic and is a feature that allows the
switch to “listen in” on the IGMP conversation between hosts and routers by processing the
layer 3 packets IGMP packets sent in a multicast network.
When IGMP snooping is enabled, this WLAN VoIP Residential Gateway analyses all the
IGMP packets between hosts connected to it and multicast routers in the network. When it
hears an IGMP report from a host for a given multicast group, it adds the host's port number
to the multicast list for that group. And, when it hears an IGMP Leave, it removes the host's
port from the table entry.
IGMP snooping can effectively reduce multicast traffic from streaming and other bandwidth
intensive IP applications. This gateway using IGMP snooping will only forward multicast
traffic to the hosts interested in that traffic. This reduction of multicast traffic reduces the
packet processing at the gateway and also reduces the workload at the end hosts.
Select
IGMP Control
from the
Switch Configuration
menu,
then
IGMP Control
screen
page shows up.
IGMP Proxy:
Enable IGMP Proxy if checked.
