F3215-HP Load Balancing Module Network Management Configuration Guide-6PW101

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Configuring IPv4 addressing
• The device supports configuring IPv4 addressing in the Web interface and at the CLI. For
information on configuring IPv4 addressing in the Web interface, see "Configuring interfaces." This
c
hapter describes configuring IPv4 addressing at the CLI.
• For information about configuring IPv6 addressing, see "Configuring IPv6 basics."
Overview
This section describes the IP addressing basics.
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.
IP address classes
Each IP address breaks down into the following 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, as shown in Figure 10. The shaded areas represent the address
cla
ss. The first three classes are widely used.
Figure 10 IP address classes
Table 3 IP address classes and ranges
Class Address ran
g
e Remarks
A
0.0.0.0 to
127.255.255.255
The IP address 0.0.0.0 is used by a host at startup for temporary
communication. This address is never a valid destination address.
Addresses starting with 127 are reserved for loopback test.
Packets destined to these addresses are processed locally as input
packets rather than sent to the link.
B
128.0.0.0 to
191.255.255.255
N/A