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TD-8817 ADSL2+ Ethernet/USB Modem Router User Guide
21
Figure 4-7
Encapsulation: Select the encapsulation mode for the Dynamic IP Address, you can leave it
default.
Bridge Interface: Activate the option, the modem router can also work in Bridge mode.
Default Route: If enable this function, the current PVC will be considered as the default
gateway to Internet from this device.
TCP MTU Option: Enter the TCP MTU as your desire. The default value is 1500.
IPv4 Address: If you select IPv4 as IP version, you should configure the following.
NAT: Select this option to Enable/Disable the NAT (Network Address Translation) function
for this VC. The NAT function can be activated or deactivated per PVC basis.
Dynamic Route: Select this option to specify the RIP (Routing Information protocol) version
for WAN interface, including RIP1, RIP2-B and RIP2-M. RIP2-B and RIP2-M are both sent in
RIP2 format, the difference is that RIP2-M using Multicast, while RIP2-B using Broadcast
format.
Direction: Select this option to specify the RIP direction. None is for disabling the RIP
function. Both means the ADSL modem router will periodically send routing information and
accept routing information, and then incorporate them into routing table. IN only means the
ADSL modem router will only accept but will not send RIP packet. OUT only means the
ADSL modem router will only send but will not accept RIP packet.
Multicast: Select IGMP version, or disable the function. IGMP (Internet Group Multicast
Protocol) is a session-layer protocol used to establish membership in a multicast group. The
ADSL ATU-R supports IGMP version 1 (IGMP v1), IGMP version 2 (IGMP v2) and IGMP
version 3 (IGMP v3). Select “Disabled” to disable it.
Dual Stack Lite: Enable the Dual Stack Lite (D-S Lite) function if you need. It is disabled by
default.