Revision 3.1
WebRelay
TM
Users Manual
2.4.2 Network Setup Page
The network parameters are changed on this page. Note that if multiple WebRelay
TM
units are used on the
same network, install one unit at a time and set the IP address of each unit before connecting the next unit to
the network. This avoids having multiple WebRelay
TM
units installed on the network with the same factory
default IP address at the same time. It may be necessary to clear the arp cache each time you swap
WebRelay
TM
units on the network (this is because each unit has the same default IP address but a different
mac address). This is done by typing
arp -d
in the command prompt of a Windows computer (
arp -d
-a
as super user on Apple OSX). Also note that the unit must be power-cycled (power disconnected, then
reconnected) before network settings take effect. No other setup page requires power-cycling for the
settings take effect.
1. IP Address:
WebRelay
TM
requires a static IP address. This is a unique address that identifies
WebRelay
TM
on the network. Dynamic IP address assignment is not supported. The lack
of dynamic IP addressing support is intentional because dynamically changing the IP
address would make it difficult for a client to access the web server built into WebRelay
TM
.
The IP address is specific to the network where WebRelay
TM
will be installed, and must be
obtained from the network administrator.
This guide is not meant to be a tutorial on IP addressing, however a few comments about
IP addressing are given here.
If WebRelay
TM
will be used over the Internet, the IP address must be a routable address
assigned by the upstream Internet Service Provider (ISP).
In cases where the ISP only provides a single routable IP address for the entire network
(this is typical with ISPs such as cable providers), a proxy server (or gateway router) may
be used. A proxy server allows multiple devices to connect to the Internet using a single
Xytronix Research & Design, Inc.
page 23