Avaya Communication Manager Administrator's Manual page 1135

Subnet Mask
Valid entries
255, 254, 252,
248, 240, 224,
192, 128, 0
There is one-to-one mapping between the Network Bits and the Subnet Mask fields; entering
a value in one field uniquely determines the other field. A list of Subnet Mask addresses and
their corresponding Network Bits are shown in
Table 14: Network Bits and Subnet Mask fields
Network
Bits
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Usage
Enter the subnet mask associated with this IP route.
If you enter a value in the Network Bits field, the
system automatically completes this field with the
corresponding Subnet Mask. For example, if you set
this field to 255.255.255.0, then the system sets the
Network Bits field to 24.
Table
Subnet Mask Number of
Hosts
0.0.0.0 4,294,967,294
128.0.0.0 2,147,483,646
192.0.0.0 1,073,741,822
224.0.0.0 536,870,910
240.0.0.0 268,435,454
248.0.0.0 134,217,726
252.0.0.0 67,108,862
254.0.0.0 33,554,430
255.0.0.0 16,777,214
255.128.0.0 8,388,606
255.192.0.0 4,194,302
255.224.0.0 2,097,150
255.240.0.0 1,048,574
255.248.0.0 524,286
255.252.0.0 262,142
255.254.0.0 131,070
14).
Network
Type
/ 0
/ 1
/ 2
/ 3
/ 4
/ 5
/ 6
/ 7
/ 8
/ 9
/ 10
/ 11
/ 12
/ 13
/ 14
/ 15
Issue 1 June 2005
IP Routing
1 of 2
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