User's Manual

Appendix F IP subnetting 237
BCM50a Integrated Router Configuration — Advanced
Example: eight subnets
Similarly, use a 27-bit mask to create 8 subnets (001, 010, 011, 100, 101, 110).
Table 53 shows class C IP address last-octet values for each subnet.
Table 51 Subnet 3
Network number Last Octet Bit Value
IP Address 192.168.1. 128
IP Address (Binary) 11000000.10101000.00000001. 10000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11000000
Subnet Address: 192.168.1.128 Lowest Host ID: 192.168.1.129
Broadcast Address:
192.168.1.191
Highest Host ID: 192.168.1.190
Table 52 Subnet 4
Network number Last Octet Bit Value
IP Address 192.168.1. 192
IP Address (Binary) 11000000.10101000.00000001. 11000000
Subnet Mask (Binary) 11111111.11111111.11111111. 11000000
Subnet Address: 192.168.1.192 Lowest Host ID: 192.168.1.193
Broadcast Address: 192.168.1.255 Highest Host ID: 192.168.1.254
Table 53 Eight subnets
Subnet Subnet Address First Address Last Address Broadcast Address
1 0 1 30 31
2 32 33 62 63
3 64 65 94 95
4 96 97 126 127
5 128 129 158 159
6 160 161 190 191