User's Manual

ONFIGURING THE

ADSL R

OUTER

4-24

• NAT Domain: select private or public.

• IGMP Snooping: Internet Group Management Protocol (IGMP)

snooping is a method by which Layer 2 devices can “listen in” on

IGMP conversations between hosts and routers. When a switch hears

a group join message from a host, it notes which switch interface it

heard the message on, and adds that interface to the group. Similarly,

when a Layer 2 switch hears a group leave message or a response timer

expires, the switch will remove that host’s switch interface from the

group.

• IGMP Querier: if the IGMP Querier is enabled, then the router will

periodically query all multicast group members on the specified

VLAN.