Configuring Ip Addressing; Overview; Ip Address Classes - HP 10500 Series Configuration Manual

Configuring IP addressing

This chapter describes IP addressing basic and manual IP address assignment for interfaces. Dynamic IP
address assignment (DHCP) is beyond the scope of this chapter.
NOTE:
The term "interface" in this chapter collectively refers to Layer-3 interfaces, including VLAN interfaces and
Layer 3 Ethernet interfaces. You can set an Ethernet port as a Layer 3 interface by using the port link-mode
route command (see

Overview

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
class. The first three classes are widely used.
Figure 13 IP address classes
Table 1 IP address classes and ranges
Class
A
B
Layer 2—LAN Switching Configuration Guide
Address range
0.0.0.0 to
127.255.255.255
128.0.0.0 to
191.255.255.255
Figure 13. The shaded areas represent the address
Remarks
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.
N/A
24
).