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G2wifi II User’s Manual
Copyright of 3JTech Co., Ltd. (also doing business as A3J Engineering Inc.)
29
DHCP IP Address Range:
These two values (
from
and
to
) define a range of addresses that
the DHCP Server uses when assigning addresses to computers and devices on your Local
Area Network. Any addresses that are outside of this range are not managed by the DHCP
Server; these could, therefore, be used for manually configured devices or devices that cannot
use DHCP to obtain network address details automatically.
It is possible for a computer or device that is manually configured to have an address that
does reside within this range. In this case the address should be reserved (see
Static DHCP
Client
below), so that the DHCP Server knows that this specific address can only be used by a
specific computer or device.
Y o u r 3Jtech router, by default, has a static IP address of 192.168.0.1. This means that
addresses 192.168.0.2 to 192.168.0.254 (from 2 to 254) can be made available for allocation
by the DHCP Server.
Example,
Your 3Jtech router uses 192.168.0.1 for the IP address. You've assigned a computer that
you want to designate as a Web server with a static IP address of 192.168.0.3. You've
assigned another computer that you want to designate as an FTP server with a static IP
address of 192.168.0.4. Therefore the starting IP address for your DHCP IP address range
needs to be 5 or greater.
Example,
Suppose you configure the DHCP Server to manage addresses From 100 To 199. This
means that 3 to 99 and 200 to 254 are NOT managed by the DHCP Server. Computers or
devices that use addresses from these ranges are to be manually configured. Suppose
you have a web server computer that has a manually configured address of 192.168.0.100.
Because this falls within the "managed range" be sure to create a reservation for this
address and match it to the relevant computer (see
Static DHCP Client
below).
DHCP Lease Time:
The amount of time that a computer may have an IP address before it is
required to renew the lease. The lease functions just as a lease on an apartment would. The
initial lease designates the amount of time before the lease expires. If the tenant wishes to
retain the address when the lease is expired then a new lease is established. If the lease
expires and the address is no longer needed than another tenant may use the address.
