Longshine LCS-IR2114-D - Manual (Page 26)

IP Sharing Router
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MTU
The default MTU size is 1492 bytes, which is usually fine. For some ISPs you
need to reduce the MTU. This should not be done unless you are sure it is
necessary for your ISP connection.
Maximum Idle
Time
Enter the a specified period of the Internet connectivity
Connection Mode
There are three modes: keep-alive; auto-connect; Manual-on
Keep-alive: you can configure the router to disconnect your Internet
connection after a specified period of the Internet connectivity (Max Idle
Time). If your Internet connection has been terminated due to inactivity,
Keep-alive enables the router to automatically re-establish your connection as
soon as you attempt to access the Internet again.
Auto-connect: Connect automatically after the router is disconnected.
Manual-on: You can configure the router to make it connect or disconnect
manually. After a specified period of inactivity (Max Idle Time), the router will
disconnect your Internet connection, and not be able to re-establish your
connection automatically as soon as you attempt to access the Internet again.
Static DNS Server Select it or not to configure this parameter.
Primary DNS &
Secondary DNS
If you know that your ISP does not automatically transmit DNS addresses to
the router during login, enter the address in dotted-decimal notation of your
ISP’s primary DNS server. If a secondary DNS server address is available,
enter it as well.
MAC Cloning Select it or not to configure this parameter.
MAC Address
This field displays the MAC address of the PC that is managing the router. If
the MAC address is required, you can click the Clone MAC button to copy the
MAC address of the Ethernet Card and replace the WAN MAC address with
this MAC address.