Allied Telesis AT-AR256E - Manual (Page 19)

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Figure 11 (Example of a DHCP Relay configuration)
By turning off the DHCP server and relay, the network administrator must carefully configure the
IP address, Subnet Mask and DNS settings of every computer on your network. Do not assign
the same IP address to more than one computer, and the ADSL router must be on the same
subnet as all the other computers.
The Apply button will temporarily save this connection. To make the change permanent, you
need to click on Save Settings (at the side of the page). At the system commands page, click on
Save All.
4.5.2 Changing the ADSL Router IP Address
You can change the ADSL router’s IP address by clicking Setup and under LAN Setup, select
Management. This will bring up the page shown in Figure 12.
4.5.2.1 Static IP Address Assignment
The ADSL router’s default IP address and subnet mask are 192.168.1.1/255.255.255.0; this
subnet mask will allow the ADSL router to support 254 users. If you want to support a larger
number of users, you can change the subnet mask; but remember, the DHCP server is defaulted
to only give out 255 IP addresses. Further remember that if you change your gateway’s IP
address and you have DHCP enabled, the DHCP configuration must reside within the same
subnet.
The default gateway is the routing device used to forward all traffic that is not addressed to a
station within the local subnet. Your ISP will provide you with the default gateway address.
Figure 12 shows a default gateway address of 203.125.64.1 because this was the default
gateway defined when the CLIP connection was configured.
The Hostname can be any alphanumeric word that does not contain spaces. The Domain Name
is used in conjunction with the Hostname to uniquely identify the gateway. To access the ADSL
router’s web pages, the user can type 192.168.1.1 (the default IP address) or type
AlliedTelesyn.