TP-LINK 1910010885 User Manual

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TD-W8970B 
300Mbps Wireless N Gigabit ADSL2+ Modem Router (Annex B) User Guide
 
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Secondary DNS - (Optional.) Input the IP address of another DNS server if your ISP 
provides two DNS servers. 
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  DHCP Relay: Select Relay, then you will see the next screen, and 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. 
 
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Note: 
1)  To use the DHCP server function of the modem router, you must configure all computers on 
the LAN as "Obtain an IP Address automatically". 
2)  You have to disable NAT of the WAN connections, or the DHCP Relay may not take effect. 
3)  If you select Disabled, the DHCP function will not take effect. 
Click the Save button to save your settings. 
4.6.2  Clients List 
Choose menu “DHCP Server”Æ“Clients List”, you can view the information about the clients 
attached to the modem router in the screen as shown in Figure 4-29. 
 
Figure 4-29 
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Client Name
:
 The name of the DHCP client   
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MAC Address
:
 The MAC address of the DHCP client   
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IP Address
:
 The IP address that the modem router has allocated to the DHCP client 
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Valid Time
:
 The time of the DHCP client leased. After the dynamic IP address has expired, 
a new dynamic IP address will be automatically assigned to the user.     
You cannot change any of the values on this page. To update this page and to show the current 
attached devices, click the Refresh button.