Specifications

Mega 100WR2 ADSL2+ Router - Manual
Page 20 of 81
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 is10.0.0.254.
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 254), or if you are not
using as many PCs as you have allowed DHCP numbers and you are still having the problem,
then you should 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 10.0.0.2 (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.
When 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 router must be on the same
subnet as all the other computers. See Figure 4-10.
Figure 4-10: LAN / DHCP Configuration