Draytek Vigor2912 User Manual page 130

ISP Access Setup
MTU
PPP Setup
IP Address Assignment
Method(IPCP)
Vigor2912 Series User's Guide
Disable – Click this radio button to close the connection
through PPTP or L2TP.
Server Address - Specify the IP address of the PPTP/L2TP
server if you enable PPTP/L2TP client mode.
Specify Gateway IP Address – Specify the gateway IP
address for DHCP server.
Username -Type in the username provided by ISP in this
field. The maximum length of the user name you can set is
63 characters.
Password -Type in the password provided by ISP in this
field. The maximum length of the password you can set is
62 characters.
Index (1-15) in Schedule Setup - You can type in four sets
of time schedule for your request. All the schedules can be
set previously in Application >> Schedule web page and
you can use the number that you have set in that web page.
It means Max Transmit Unit for packet.
Path MTU Discovery – It is used to detect the maximum
MTU size of a packet not to be segmented in specific
transmit path.
Click Detect to open the following dialog.

Path MTU to – Type the IP address as the specific
transmit path.

MTU reduce size by – It determines the decreasing
size of MTU value. For example, the number specified
in this field is "8". The maximum MTU size is
"1500". After clicking the "detect" button, the system
will calculate and get the suitable MTU value such as
1500, 1492, 1484 and etc., automatically.

Detect – Click it to detect a suitable MTU value

Accept – After clicking it, the detected value will be
displayed in the field of MTU.
PPP Authentication - Select PAP only or PAP or CHAP
for PPP.
Idle Timeout - Set the timeout for breaking down the
Internet after passing through the time without any action.
WAN IP Alias - If you have multiple public IP addresses
and would like to utilize them on the WAN interface, please
use WAN IP Alias. You can set up to 8 public IP addresses
120