ZyXEL Communications MWR222 - V1.0 Manual page 240

10 255.255.255.192 (/26)
11 255.255.255.224 (/27)
12 255.255.255.240 (/28)
13 255.255.255.248 (/29)
14 255.255.255.252 (/30)
15 255.255.255.254 (/31)
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
MWR222.
Once you have decided on the network number, pick an IP address for your
MWR222 that is easy to remember (for instance, 192.168.10.1) 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
MWR222 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
MWR222 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
MWR222 User's Guide
1024 62
2048 30
4096 14
8192 6
16384 2
32768 1
240