D-Link DSL-X1852E User Manual page 44

Section 4 - Configuration
MTU:
Maximum Transmission Unit - you may need to change the MTU for
optimal performance with your ISP. The default is 1500.
NAT Enable: Network address translation (NAT) translates private IP addresses to
public IP addresses prior to allowing private IP networks to connect
to the public network. This option is not available for related voice
service types such as VOICE, VOICE_INTERNET, and TR069_VOICE and
TR069.
IPv6 Settings
IPv6 Message This displays the IP assignment method.
Fetch Type:
IPv6 Address Enter an IPv6 address in this format: x:x:x:x:x:x:x:x/y (where each x
represents a hexadecimal digit, y is an integer from 1 to 128 as the
prefix length), for example, 2001:b011:2000:0012::1/64.
IPv6 Default Enter the IP address of the default gateway.
Gateway:
IPv6 DNS Server Enter the DNS server address.
1:
IPv6 DNS Server Enter the secondary DNS server address as a backup.
2:
PD Enable Enable or disable prefix delegation. Also select the prefix mode: Auto
or Manual. For Manual, please enter the prefix address, for example,
2001:b011:2000:0012::. The prefix is used to determine the subnet
prefix of an IPv6 address. Then enter the prefix information option
by specifying preferred lifetime and valid lifetime for the prefix (600-
4294967295 seconds).
Click Save when you are done.
D-Link DSL-X1852E User Manual 38