TP-LINK TD-8816 사용자 설명서

다운로드
페이지 74
TD-8816
ADSL2+ Modem Router User Guide 
 
29 
• 
IP Pool Count: The max user pool size. 
• 
Lease Time: The length of time for the IP lease. After the dynamic IP address has 
expired, the user will be automatically assigned a new dynamic IP address. The default 
is 259200 seconds. 
• 
DNS Relay: If you want to disable this feature, you just need to set both Primary and 
secondary DNS IP to 0.0.0.0. If you want to use DNS relay, you can setup DNS server IP 
to 192.168.1.1 on their Computer. If not, the device will perform as no DNS relay. 
• 
Primary DNS Server: Type in your preferred DNS server. 
• 
Secondary DNS Server: Type in your preferred DNS server. 
• 
Radvd Enable: Enable the Radvd if you need. 
• 
DHCP6 Server: Enable the DHCP6 server if you need. 
)
 
Note: 
If  Use Auto Discovered DNS Server Only is selected in DNS Relay, this modem 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 Use User Discovered DNS Server Only is 
selected in DNS Relay, it is necessary for you to enter the primary and optional secondary DNS 
server IP addresses. After type in the address, click SAVE button to save it and invoke it.   
¾
  DHCP Relay: Select Relay, then you will see the next screen (shown in Figure 4-17), the 
modem router will work as a DHCP Relay. A DHCP relay is a computer that forwards DHCP 
data between computers that request IP addresses and the DHCP server that assigns the 
addresses. Each of the device's interfaces can be configured as a DHCP relay. If it is enabled, 
the DHCP requests from local PCs will forward to the DHCP server runs on WAN side. To 
have this function working properly, please run on Router mode only, disable the DHCP 
server on the LAN port, and make sure the routing table has the correct routing entry. 
 
Figure 4-17 
• 
DHCP Server IP for Relay Agent: Enter the DHCP server IP Address runs on WAN 
side. 
)
 
Note: 
If you select Disabled, the DHCP function will not take effect. 
4.3.3  6RD 
IPv6 tunnel is a kind of transition mechanism to enable IPv6-only hosts to reach IPv4 services and 
to allow isolated IPv6 hosts and networks to reach each-other over IPv4-only infrastructure before 
IPv6 completely supplants IPv4. It is a temporary solution for networks that do not support native 
dual-stack, where both IPv6 and IPv4 run independently.