Draytek Vigor2920 Series User Manual page 105

Available settings are explained as follows:
Item
Network Configuration
DHCP Server
Configuration
After finishing all the settings here, please click OK to save the configuration.
Description
Click Enable to enable such configuration.
Click Disable to disable such configuration.
For NAT Usage - Click this radio button to invoke NAT
function.
IP Address - Type in private IP address for connecting to a
local private network (Default: 192.168.1.1).
Subnet Mask - Type in an address code that determines the
size of the network. (Default: 255.255.255.0/ 24)
DHCP stands for Dynamic Host Configuration Protocol. The
router by factory default acts a DHCP server for your network
so it automatically dispatch related IP settings to any local user
configured as a DHCP client. It is highly recommended that
you leave the router enabled as a DHCP server if you do not
have a DHCP server for your network.
If you want to use another DHCP server in the network other
than the Vigor Router's, you can let Relay Agent help you to
redirect the DHCP request to the specified location.
Enable Server - Let the router assign IP address to every host
in the LAN.
Disable Server – Let you manually assign IP address to every
host in the LAN.
Start IP Address - Enter a value of the IP address pool for the
DHCP server to start with when issuing IP addresses. If the 1st
IP address of your router is 192.168.1.1, the starting IP address
must be 192.168.1.2 or greater, but smaller than 192.168.1.254.
IP Pool Counts - Enter the maximum number of PCs that you
want the DHCP server to assign IP addresses to. The default is
50 and the maximum is 253.
Gateway IP Address - Enter a value of the gateway IP address
for the DHCP server. The value is usually as same as the 1st IP
address of the router, which means the router is the default
gateway.
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Vigor2920 Series User's Guide