Draytek Vigor167 User Manual page 44

IPv4 - Below shows the additional options for IPv4 Setting:
Service Name
(Optional)
Fallback Account
Separate Account for
ADSL
PPP Authentication
IP Assignment
IP Alias
MTU
Mode
Cancel
Apply
After finishing this web page configuration, please click Apply to save the settings.
rtVBR - Real-time Variable Bit Rate.
It is available when PPPoA/PPPoE is selected as IPv4 Connection Type.
Sets the PPP service name tag. Required by some ISPs. Leave blank
unless instructed otherwise by your ISP.
It is available when PPPoA/PPPoE is selected as IPv4 Connection Type.
Switch the toggle to enable or disable the function.
Once the primary user account fails to set a network connection, use
the fallback account instead.
Username - Enter a string as a username of the fallback account.
Password - Enter a string as the password.
It is available when PPPoA/PPPoE is selected as IPv4 Connection Type.
In default, WAN1 supports VDSL2/ADSL and uses the same PPPoE
account and password for connection. If ADSL mode requires a
separate user name and password, enable this function and fill out
the Username and Password fields below.
Switch the toggle to enable or disable the function.
Username - Enter a string as the username.
Password - Enter a string as the password.
It is available when PPPoA/PPPoE is selected as IPv4 Connection Type.
It means the protocol used for PPP authentication.
Both PAP and CHAP (Challenge-Handshake Authentication Protocol)
can be used for PPP authentication. Router negotiates with the PPTP
or L2TP server to determine which protocol to use.
It is available when PPPoA/PPPoE is selected as IPv4 Connection Type.
DHCP - WAN IP address is dynamically allocated.
Static IP - ISP has assigned a fixed WAN IP address.
IP Address - Enter the IP address offered by your ISP.

+Add - Click to enter multiple WAN IPv4 addresses assigned by your
ISP.
MTU
Maximum Transmission Unit, the size of the largest packet, in bytes,
that can be transmitted to the WAN. The maximum value is 1500. For
PPPoE connections, there is always an 8-byte overhead, so the
maximum valid MTU value for PPPoE is 1492.
WAN MAC Address
Default - Use the default MAC address for the WAN Ethernet port.
Customized - Select this option if your ISP authenticates by MAC
addresses.
MAC - Specify a MAC address for the WAN Ethernet port.

Discard current settings and return to previous page.
Save the current settings and exit the page.
36