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DI-634M User’s Manual 
D-Link Systems, Inc.
Using the Configuration Menu
Maximum Transmission Unit-1492 is the default setting-you 
may need  to change  the MTU  for optimal  performance with 
your specific ISP.
Typically, connections such as PPPoE, PPTP, and L2TP are not 
always on. The router allows you to set the connection mode. 
The settings are:
Always  on:  A  connection  to  the  Internet  is  always 
maintained.
Connect on demand: A connection to the Internet is made 
as  needed;  and  the  connection  is  dropped  after  “Maximum 
Idle Time” minutes of no activity. 
Manual: You have to  open up  the Web-based management 
interface and click the Connect button manually any time that 
you wish to connect to the Internet. 
Home > WAN (L2TP)
MTU:
Connection Mode 
Select: