Configuration and Management
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W20/21 IP address
The LAN IP address of the Ericsson W20/21.
Subnet mask
The subnet mask, which determines the range of
IP addresses on the subnet.
If you want to change the W20/21 IP address, make sure that the new
address is not included in the DHCP server IP address range, displayed in
the
DHCP Server
section. The default range is 192.168.1.2 –
192.168.1.100.
Before you change the W20/21 IP address or subnet mask you also have
to make sure that the DHCP server IP address range is included in the new
subnet. If you want to change the subnet not to include the DHCP IP
address range, you first have to disable the DHCP server.
If port forwarding is configured, those settings have to be removed before
changing the W20/21 IP address or subnet mask. For information, see
section
2.7.3 – “Port Forwarding”.
To change the W20/21 IP address or subnet mask, type the new value in
the corresponding field and click
Apply
to save the settings.
Note:
If you change the LAN IP address while connected to the Ericsson
W20/21 web pages through a web browser, you will be
disconnected. You have to redirect the web browser to the new
address in order to confirm the new settings. Type the new LAN IP
address in the
Address
(URL) field and press the
key.
2.5.1 DHCP
Server
The Ericsson W20/21 incorporates a DHCP (Dynamic Host Configuration
Protocol) server that assigns dynamic IP addresses to local clients. The IP
addresses are collected from a predefined range of available addresses.
The default address range is suitable for most local networks.
The DHCP server uses the concept of a "lease”, that is the amount of time
that a given IP address will be valid for a specific device. If the lease time
expires and the device is still connected, the lease is automatically
renewed.
The following configuration options are displayed in the
DHCP server
section on the
LAN
page:
Enable DHCP server
If this check box is selected the DHCP server is
working, otherwise it is turned off.