ZyXEL Communications P-2612HNU-Fx User Manual page 128

Chapter 6 LAN Setup
organization, you should consult your network administrator for the appropriate IP
addresses.
Note: Regardless of your particular situation, do not create an arbitrary IP address;
always follow the guidelines above. For more information on address
assignment, please refer to RFC 1597, "Address Allocation for Private
Internets" and RFC 1466, "Guidelines for Management of IP Address Space".
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P-2612HNU-Fx User's Guide