From: Harbir Kohli (harbirk@xxxxxxxxxxxx)
Date: Sun Aug 06 2000 - 13:50:16 GMT-3
Hello all,
What is the problem with using subnet 7 in the following:
IP Subnet Calculation & Design
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IP Class: C IP Address: 192.168.5.0
Mask Bits: 3 Subnet Mask: 255.255.255.224
Subnets: 6+1 IP Major Net: 192.168.5.0
Hosts/Subnet: 30 Major Net Bcast: 192.168.5.255
Subnets for Fixed Length Subnet Masking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . .
No. Subnet Hosts Hosts Broadcast
Address From To Address
0 192.168.5.0 192.168.5.1 192.168.5.30
192.168.5.31
1 192.168.5.32 192.168.5.33 192.168.5.62
192.168.5.63
2 192.168.5.64 192.168.5.65 192.168.5.94
192.168.5.95
3 192.168.5.96 192.168.5.97 192.168.5.126
192.168.5.127
4 192.168.5.128 192.168.5.129 192.168.5.158
192.168.5.159
5 192.168.5.160 192.168.5.161 192.168.5.190
192.168.5.191
6 192.168.5.192 192.168.5.193 192.168.5.222
192.168.5.223
7 192.168.5.224 192.168.5.225 192.168.5.254
192.168.5.255
Don't use subnet 0 (unless using ip subnet-zero command) and subnet 7.
Address space wasted by subnetting = 29.13% ( 17.32% with ip
subnet-zero)
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