Sapido IPJC1n User Manual page 50

DHCP
Item
Host Name
MTU Size
DNS
Clone Mac Address
Save & Apply
Description
You can keep the default as the host name, or input a
specific name if required by your ISP.
Maximum Transmission Unit. Usually provide by
computer operation systems (OS). Advanced users can
set it manually.
Select Attain DNS Automatically. Or select Set DNS
Manually, if you want to specify the DNS, and enter the
DNS provided by your ISP in DNS 1 2 3.
Some ISPs require MAC address registration. In this
case, enter the MAC address registered to the provider
to "Clone MAC Address"
Click on Save to save the setting date, the Apply button
for execute current configuration.