In the unusual event that you have a separate DHCP server on your LAN, you can disable the cable
modem/router’s DHCP server by selecting the No radio button. If you do this, make sure the IP
address assigned to the cable modem/router is on the same subnet as that of the external DHCP
server, or you won’t be able to access the cable modem/router from the LAN. The base LAN IP
address of the cable modem/router can be set from the Basic Setup page.
Note that the cable modem/router will only operate on a class C subnet, with subnet mask
255.255.255.0
You may also want to disable the DHCP server if you have assigned static IP addresses to all devices
on your network.
Table 7. DHCP Menu Options
Option
Description
DHCP Server
Select Yes to use internal DHCP server of the cable modem/router, or select
No to disable it.
Starting Local
Address
Configure the starting IP address for IP leases available to devices on the
LAN.
Number of
CPEs
Configure the number of PCs supported on the LAN.
Lease Time
Configure the time a lease will last before it must be renewed. Default is 3600
seconds , or 1 hour.
DDNS
The DDNS page allows you to make use of a DDNS server. Dynamic DNS (DDNS) allows a
dynamic IP address to be aliased to a static, pre-defined host name so that the host can be easily
contacted by other hosts on the internet even if its IP address changes. This means you can host a
server on your LAN that can be accessed from anywhere on the Internet.
Caution:
Some service providers may consider connection of such a server to be a breach of your
service agreement.
The cable modem/router supports a dynamic DNS client compatible with the Dynamic DNS service
(
). You must sign up with this service if you want to use it.
To access the
DDNS
page:
1
Click
Basic
in the menu bar.
2
Then click the
DDNS
submenu.
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