Installing and Administering LAN/9000 Software

Chapter 6 161
Network Addressing
Variable-Length Subnet Addressing
Subnet number: 1
Mirror image subnet number: 2
Subnet address: 192.6.12.64
Host address range: 65 to 126
Host A internet address: 192.6.12.65 for network interface lan1
Networking LAN subnet
Subnet mask: 255.255.255.128
Subnet number: 17
Mirror image subnet number: 2
Subnet address: 192.6.12.0
Host address range: 1 to 126 and 129 to 254
Host A internet address: 192.6.12.1 for network interface lan0
Host B internet address: 192.6.12.120 for network interface lan0
Host C internet address: 192.6.12.130 for network interface lan1
Host D internet address: 192.6.12.182 for network interface lan1
R & D Department Subnet
Subnet mask: 255.255.255.224
Subnet number: 6
Mirror image subnet number: 3
Subnet address: 192.6.12.192
Host address range: 193 to 222
Host C internet address: 192.6.12.193 for network interface lan1
Manufacturing Department Subnet
Subnet mask: 255.255.255.240
Subnet number: 2
Mirror image subnet number: 4
Subnet address: 192.6.12.32
Host address range: 33 to 46
Host B internet address: 192.6.12.33 for network interface lan1
Example of Network Map with Variable-Length Subnets
This sample network combines networks, subnets with variable-length
subnet masks, and clusters previously described and illustrated in this
chapter. Note that the subnet masks for each IP address are shown on
the accompanying worksheet.