TP-Link TL-ER6120 User Manual page 20

The following items are displayed on this screen:
Dynamic IP

Connection Type:
Host Name:
MTU:
Get IP Address by
Unicast:
Figure 3-7 WAN – Dynamic IP
Select Dynamic IP if your ISP assigns the IP address automatically.
Click <Obtain> to get the IP address from your ISP's server. Click
<Release> to release the current IP address of WAN port.
Optional. This field allows you to give a name for the router. It's
blank by default.
MTU (Maximum Transmission Unit) is the maximum data unit
transmitted by the physical network. It can be set in the range of
576-1500. The default MTU is 1500. It is recommended to keep the
default value if no other MTU value is provided by your ISP.
The broadcast requirement may not be supported by a few ISPs.
Select this option if you can not get the IP address from your ISP
even if with a normal network connection. This option is not
required generally.
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