Installation manual

Operation Manual - Getting Started
Quidway S3000-EI Series Ethernet Switches Chapter 5
System IP Configuration
Huawei Technologies Proprietary
5-3
Network Address IP network
Note
class range range
O
add
as LAN ther
resses
255.255.2
55.255
255.255.255.2
55
255.255.255.255 is used
broadcast address.
opment of the Internet, IP addresses are depleting very fast.
ress allocation method wastes IP addresses greatly. In order to
r, the first
consecutive bits are set to 1s when designing the mask. The mask divides the IP
to two parts: subnet address and host address. The bits 1s in the address
and the mask indicate the subnet address and the other bits indicate the host address.
sk is the default value and the length
P addresses of classes A, B and C, the
divide a Class A network containing more than 16,000,000
work
rk into 8
8.128.0,
). Each
II. Subnet and mask
Nowadays, with rapid devel
The traditional IP add
make full use of the available IP addresses, the concept of mask and subnet is
proposed.
A mask is a 32-bit number corresponding to an IP address. The number consists of 1s
and 0s. Principally, these 1s and 0s can be combined randomly. Howeve
address in
If there is no sub-net division, then its sub-net ma
of "1" indicates the net-id length. Therefore, for I
default values of corresponding sub-net mask are 255.0.0.0, 255.255.0.0 and
255.255.255.0 respectively.
The mask can be used to
hosts or a Class B network containing more than 60,000 hosts into multiple small
networks. Each small network is called a subnet. For example, for the Class B net
address 138.38.0.0, the mask 255.255.224.0 can be used to divide the netwo
subnets: 138.38.0.0, 138.38.32.0, 138.38.64.0, 138.38.96.0, 138.3
138.38.160.0, 138.38.192.0 and 138.38.224.0 (Refer to the following figure
subnet can contain more than 8000 hosts.