Configuring Internet Group Management Protocol - Cisco Small Business RV220W Administration Manual

Configuring Networking
Configuring the LAN
STEP 1
STEP 2
STEP 3
STEP 4
Cisco RV220W Administration Guide

Configuring Internet Group Management Protocol

Internet Group Management Protocol (IGMP) is an exchange protocol for routers.
Hosts that want to receive multicast messages need to inform their neighboring
routers of their status.
In some networks, each node in a network becomes a member of a multicast
group and receives multicast packets. In these situations, hosts exchange
information with their local routers using IGMP.
Routers use IGMP periodically to check if the known group members are active.
IGMP provides a method called dynamic membership by which a host can join or
leave a multicast group at any time.
To configure IGMP:
Choose Networking > LAN > IGMP Configuration.
Check the Enable box to allow IGMP communication between the RV220W and
other nodes in the network.
In the Upstream Interface field, click WAN or LAN.
The upstream interface is the interface on which the multicast traffic is received.
For example if the multicast sender is on the Internet, the WAN is the upstream
Interface and if the multicast sender is on the LAN side, the LAN Interface is the
upstream interface.
Click Save.
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