User guide

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.
his 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).
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By turning off the DHCP serv st carefully configure the IP
address, Subnet Mask and DN k. Do not assign the same IP
ddress to more than one computer and your ADSL Router must be on the same subnet as all the other
omputers.
To enable or disable DHCP, Click setup. Under LAN Setup, select DHCP Configuration. This will bring
up the screen shown in Fig 1-5-1. The Start IP Address is where the DHCP server starts issuing IP
addresses. T
The End IP Address is where the DHCP server stops issuing IP addresses. The ending address cann
d 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
ens 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
their current dynamic IP address. The amount of time is in units of minutes; the default value is 3
minutes (60 hours).
Note: If you change the start or end values, make sure the values are still within the same subnet as
gateways IP address. In other words, if the gateways IP address is 192.168.1.1 (default) and you chan
the DHCP start/end IP addresses to be 192.128.1.2/192.128.1.100, you will not be able to communi
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
ADSL Router is configured as DHCP server, it assigns the IP addresses to the LAN clients. When th
ADSL Router is configured as DHCP relay, it is responsible for forwarding the requests and respon
negotiating between the DHCP clients and the server. See figure 11.
er and relay the network administrator mu
S settings of every computer on your networ
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Figure 1-5.1: LAN / DHCP Configuration