INS_CNGE20FX4TX16MS
04/30/18 PAGE 60
INSTALLATION AND OPERATION MANUAL
CNGE20FX4TX16MS
TECH SUPPORT: 1.888.678.9427
4.5.8 Multicast
Multicast forwarding allows a single packet to be forwarded to multiple destinations. The service is
based on L2 switch receiving a single packet addressed to a specific Multicast address. Multicast
forwarding creates copies of the packet, and transmits the packets to the relevant ports.
Multicast Filtering
The Multicast Filtering page allows for the definition of action settings when an unknown multicast
request is received. The options include: Drop, Flood, or Router Port.
To access this page, click L2 Switching > Multicast > Multicast Filtering.
Figure 4-30. L2 Switching > Multicast > Multicast Filtering
Table 4-28. L2 Switching > Multicast > Multicast Filtering
Item
Description
Unknown
Multicast Action
Select the configuration protocol: Drop, Flood, or Router Port, to apply for any unknown
multicast event.
Apply
Click Apply to save the values and update the screen.
The ensuing table for Properties Information settings are informational only: Unknown Multicast
Action.
IGMP Snooping
IGMP Snooping is defined as the process of listening to Internet Group Management Protocol
(IGMP) network traffic. IGMP Snooping allows a network switch to listen in on the IGMP
conversation between hosts and routers and maintain a map of which links need which IP
multicast streams. Multicasts can be filtered from the links which do not need them in turn
controlling which ports receive specific multicast traffic.
