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Appendix B IP Addresses and Subnetting

WAP3205 v2 User’s Guide

136

Configuring IP Addresses

Where you obtain your network number depends on your particular situation. If the ISP or your

network administrator assigns you a block of registered IP addresses, follow their instructions in

selecting the IP addresses and the subnet mask.

If the ISP did not explicitly give you an IP network number, then most likely you have a single user

account and the ISP will assign you a dynamic IP address when the connection is established. If this

is the case, it is recommended that you select a network number from 192.168.0.0 to

192.168.255.0. The Internet Assigned Number Authority (IANA) reserved this block of addresses

specifically for private use; please do not use any other number unless you are told otherwise. You

must also enable Network Address Translation (NAT) on the WAP3205 v2.

Once you have decided on the network number, pick an IP address for your WAP3205 v2 that is

easy to remember (for instance, 192.168.1.1) but make sure that no other device on your network

is using that IP address.

The subnet mask specifies the network number portion of an IP address. Your WAP3205 v2 will

compute the subnet mask automatically based on the IP address that you entered. You don't need

to change the subnet mask computed by the WAP3205 v2 unless you are instructed to do

otherwise.

Private IP Addresses

Every machine on the Internet must have a unique address. If your networks are isolated from the

Internet (running only between two branch offices, for example) you can assign any IP addresses to

the hosts without problems. However, the Internet Assigned Numbers Authority (IANA) has

reserved the following three blocks of IP addresses specifically for private networks:

• 10.0.0.0 — 10.255.255.255

• 172.16.0.0 — 172.31.255.255

• 192.168.0.0 — 192.168.255.255

You can obtain your IP address from the IANA, from an ISP, or it can be assigned from a private

network. If you belong to a small organization and your Internet access is through an ISP, the ISP

can provide you with the Internet addresses for your local networks. On the other hand, if you are

part of a much larger organization, you should consult your network administrator for the

appropriate IP addresses.

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.

IP Address Conflicts

Each device on a network must have a unique IP address. Devices with duplicate IP addresses on

the same network will not be able to access the Internet or other resources. The devices may also

be unreachable through the network.

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ZyXEL WAP3205 Manuel d'utilisateur Page 136