Wireless Modem Router User's Manual

Chapter 4: Web Configuration
87
Internet – DNS Server
If Enable Automatic Assigned DNS checkbox is selected, this router will accept
the first received DNS assignment from one of the PPPoA, PPPoE or MER/DHCP
enabled PVC(s) during the connection establishment. If the checkbox is not selected,
it is necessary for you to enter the primary and optional secondary DNS server IP
addresses. Finish your setting and click the Apply button to save it and invoke it.
Enable Automatic Assigned DNS:
Check this box to enable this function,
or uncheck this box to disable it. The
default setting is checked. When this
function is disabled, you have to offer
the Primary DNS server and
Secondary DNS server.
If you are satisfied with the settings,
click Apply.
Internet – IGMP Proxy
The Internet Group Management Protocol (IGMP) is an Internet protocol that
provides a way for an Internet computer to report its multicast group membership to
adjacent routers.
The hosts interact with the system through the exchange of IGMP messages. When
you want to configure IGMP proxy, the system will interact with other routers through
the exchange of IGMP messages. However, when acting as the proxy, the system
performs the host portion of the IGMP task as follows:
¾ When being queried, the system will send membership reports to the group.
¾ When one of the hosts joins a multicast address group which none of other
hosts belongs to, the system will send unsolicited membership reports to that
group.
¾ When the last host in a particular multicast group leaves the group, the system
will send a leave group membership report to the router’s group.
Internet Connection:
This field displays the internet
connection(s) that set in this router.
IGMP Proxy Enabled:
Check this box to enable this function
or uncheck this box to disable this
function.
After finish the settings, click Apply.
To invoke the IGMP Snooping function,
the IGMP Proxy must be enabled first.