R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

16
IP addressing configuration
NOTE:
You can configure IP addresses in the web interface or the CLI. For more information about the IP address
configuration procedure in the web, see the chapter “Interface management configuration.” This chapter
introduces how to configure IP addresses in the CLI only.
IP addressing overview
IP address classes
IP addressing uses a 32-bit address to identify each host on a network. To make addresses easier to read,
they are written in dotted decimal notation, each address being four octets in length. For example,
address 00001000000000010000000100000001 in binary is written as 10.1.1.1.
Each IP address breaks down into two parts:
• Net ID: Identifies a network. The first several bits of a net ID, known as the class field or class bits,
identify the class of the IP address.
• Host ID: Identifies a host on a network.
IP addresses are divided into five classes, shown in Figure 6. T
he shaded areas represent the address
class. The first three classes are widely used.
Figure 6 IP address classes
Table 3 describes the address ranges of these five classes.