Introduction To Ip Addresses; Features Of Ip Addresses Supported By The S9300&S9300E - Huawei S9300 Configuration Manual

S9300&S9300E Terabit Routing Switch
Configuration Guide - IP Service

1.1 Introduction to IP Addresses

IP is the core of the TCP/IP protocol suite. The packets of the Transmission Control Protocol
(TCP), User Datagram Protocol (UDP), Internet Control Message Protocol (ICMP), and Internet
Group Membership Protocol (IGMP) are all transmitted in the format of IP datagrams. Devices
on different networks communicate with each other using their network layer addresses, namely
IP addresses.
To communicate with each other on Internet Protocol (IP) networks, each host must be assigned
an IP address.
An IP address is a 32-bit number that is composed of two parts, namely, the network ID and
host ID.
The network ID identifies a network and the host ID identifies a host on the network. If the
network IDs of hosts are the same, it indicates that the hosts are on the same network regardless
of their physical locations.
1.2 Features of IP Addresses Supported by the
S9300&S9300E
IP addresses can be obtained through static manual configuration or borrowing.
The S9300&S9300E supports IP address configuration through the following methods:
l
l
The S9300&S9300E supports the space overlapping of network segment addresses to save the
address space.
l
l
l
The S9300&S9300E supports 31-bit IP address masks. Therefore, there are only two IP
addresses in a network segment, that is, the network address and broadcast address. The two IP
addresses can be used as host addresses.
Issue 01 (2012-03-15)
Manually configuring an IP address for an interface
Borrowing an IP address from other interfaces
Different IP addresses in the overlapped network segments but not same can be configured
on different interfaces of the same device. For example, after an interface on a device is
configured with the IP address 20.1.1.1/16, if another interface is configured with the IP
address 20.1.1.2/24, the system prompts a message. However, the configuration is still
successful; if another interface is configured with the IP address 20.1.1.2/16, the system
prompts an IP address conflict. The configuration fails.
The primary IP address and the secondary IP address in the overlapped network segments
but not same can be configured on the same interface. For example, after the interface is
configured with a primary IP address 20.1.1.1/24, if the secondary IP address is 20.1.1.2/16
sub, the system prompts a message. However, the configuration is still successful.
The primary IP address and the secondary IP address in the overlapped network segments
but not same can be configured on different interfaces of the same device. However, the
primary IP address and the secondary IP address cannot be the same. For example, after an
interface on a device is configured with the IP address 20.1.1.1/16, if another interface is
configured with the IP address 20.1.1.2/24 sub, the system prompts a message. However,
the configuration is still successful.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
1 IP Addresses Configuration
2