3Com 1000 - Manual (Page 35)

Managing Over The Network 3-3
If your network is internal to your organization
only, you may use any arbitrary IP address. We sug-
gest you use addresses in the series 191.100.X.Y,
where X and Y are numbers between 1 and 254.
Use 191.101.X.Y for the SLIP address.
If your network has a connection to the external IP
network, you will need to apply for a registered IP
address. This system ensures that every IP address
used is unique; if you do not have a registered IP
address, you may be using an identical address to
someone else and your network will not operate
correctly.
Obtaining a Registered IP Address
InterNIC Registration Services is the organization
responsible for supplying registered IP addresses.
The following contact information is correct at the
time of publication:
Network Solutions
Attn: InterNIC Registration Service
505, Huntmar Park Drive
Herndon
VA 20170
U.S.A.
Telephone: (1) (703) 742 4777
If you have access to the Internet, you can find fur-
ther information about InterNIC by entering the fol-
lowing URL into your web browser:
http://www.internic.net