SAR-600E ADSL Ethernet Router User Guide
SAR-600E ADSL Router User Guide
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Note. . .
After clicking on Connect, please be sure to click on “Save Settings” to register
the username / password or any other changes.
5.3
LAN / DHCP Configuration
On one side of your ADSL Router, you have your own Local Area network (LAN) connections.
This is where you plug in your local computers to the ADSL Router. The ADSL Router is
normally configured to automatically provide all the PC's on your network with Internet
addresses.
To enable or disable DHCP, Click setup. Under LAN Setup, select DHCP Configuration. This
will bring up the screen shown in
Fig 1-8
. The Start IP Address is where the DHCP server starts
issuing IP addresses. This value must be greater than the ADSL Router IP address value. For
example if the ADSL Router IP address is 192.168.1.1 (default) than the starting IP address must
be 192.168.1. 2 (or higher). The End IP Address is where the DHCP server stops issuing IP
addresses. The ending address cannot exceed a subnet limit of 254. Hence the max value for our
default gateway is 192.168.1.254. If the DHCP server runs out of DHCP addresses, users will
not get access to network resources. If this happens you can increase the Ending IP address (to
the limit of 255) or reduce the lease time. The Lease Time is the amount of time a network user
will be allowed connection to the ADSL Router with their current dynamic IP address. The
amount of time is in units of minutes; the default value is 3600 minutes (60 hours). Note: If you
change the start or end values, make sure the values are still within the same subnet as the
gateways IP address. In other words, if the gateways IP address is 192.168.1.1 (default) and you
change the DHCP start/end IP addresses to be 192.128.1.2/192.128.1.100, you will not be able to
communicate to the ADSL Router if your PC has DHCP enabled. In addition to the DHCP server
feature, the ADSL Router supports the DHCP relay function. When the ADSL Router is
configured as DHCP server, it assigns the IP addresses to the LAN clients. When the ADSL
Router is configured as DHCP relay, it is responsible for forwarding the requests and responses
negotiating between the DHCP clients and the server.
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 your ADSL Router must be on the same
subnet as all the other computers.
