User's Guide

TD851W 150Mbps Wireless N ADSL2+ Modem Router User Guide
4.4.1 IGMP Proxy
Choose “Service→IGMP Proxy” menu, you can configure the IGMP proxy in the screen (shown in
Figure 4-38). Here you can enable or disable the IGMP proxy function on all WAN interface, and
you can also set the parameters of the IGMP function.
IP hosts use Internet Group Management Protocol (IGMP) to report their multicast group
memberships to neighbor routers. Similarly, multicast routers use IGMP to discover which of their
hosts belong to multicast group. The router supports IGMP proxy that handles IGMP message.
When enabled, the router will act as a proxy for a LAN host making request to join and leave
multicast groups, and a multicast router sending multicast packets to multicast groups on WAN
side.
Figure 4-38
)
Note:
After configuration, you need to click the Save button appeared on the left panel so that your
configuration can still take effect after the Router reboots.
4.4.2 UPnP
Choose “Service→UPnP” menu, you can configure the UPnP in the screen (shown in Figure
4-39).
UPnP (Universal Plug and Play) is a distributed, open networking standard that uses TCP/IP for
simple peer-to-peer network connectivity between devices. An UPnP device can dynamically join
a network, obtain an IP address, convey its capabilities and learn about other devices on the
network. In turn, a device can leave a network smoothly and automatically when it is no longer in
use. UPnP broadcasts are only allowed on the LAN.
60