Specifications
WAN/LAN Management Nur für den internen Gebrauch
A31003-H3580-M103-2-76A9, 01-2009
C-18 HiPath 3000/5000 V8 - HG 1500 V8, Administrator Documentation
hg-c.fm
IP Addressing: Subnets
The host addresses indicate that the individual hosts are not located in associated areas. This
type of sub-netting makes it difficult to maintain an overview for administration. This is why this
type of sub-netting should not be used.
Up to now we have described how sub-networks are created. We will now explain how the IP
addresses of computers are assigned to the respective subnets.
The following table shows four IP addresses for a network (Class C) and their connection to the
netmask being used 255.255.255.224.
The binary illustration of masks and addresses shows quite clearly which subnet the IP ad-
dresses in question belong to. Addresses 1 and 4 are in subnet ".32" (00100000), address 2
belongs to subnet ".96" (01100000) and address 3 is located in subnet ".128" (10000000).
If the example is based on the standard mask "255.255.255.0" of a Class C network, the length
of the network segment is 24 bits, while the host segment is 8 bits long. Based on netmask
"255.255.255.224" the network segment of an IP address in the network is exactly 27 bits long.
Accordingly the host segment is just 5 bits long.
The following overview provides the most commonly-used Class C masks as a reference, to-
gether with the corresponding network and host allocations.
4th byte Decimal New networks Broadcast address Host addresses
0000 0000 0 192.168.1.0 192.168.1.252 4,8,12,16,20,...,248
0000 0001 1 192.168.1.1 192.168.1.253 5,9,13,17,21,...,249
0000 0010 2 192.168.1.2 192.168.1.254 6,10,14,18,22,...,250
0000 0011 3 192.168.1.3 192.168.1.255 7,11,12,19,23,...,251
Table D-7 Network Addresses Depending on Last Two Bit Digits
Network Host
255.255.255.224 11111111.11111111.11111111.111 00000
193.98.44.33 11000001.01100010.00101100.001 00001
193.98.44.101 11000001.01100010.00101100.011 00101
193.98.44.129 11000001.01100010.00101100.100 00001
193.98.44.61 11000001.01100010.00101100.001 11101
Table D-8 Allocating IP Addresses to Class C Networks