Ruijie RG-WLAN Series

Configuration Guide Configuring IP Addresses and Services
For a class D address, the first four most significant bits are 1110 and other bits indicate a multicast address.
Figure 1-5
8
16 24 32
Class D IP
address
1
1
1
0
Multicast address
The addresses with the first four most significant bits 1111 cannot be assigned. These addresses are called class E
addresses and are reserved.
When IP addresses are planned during network construction, IP addresses must be assigned based on the property of the
network to be built. If the network needs to be connected to the Internet, users should apply for IP addresses to the
corresponding agency. In China, you can apply to China Internet Network Information Center (CNNIC) for IP addresses.
Internet Corporation for Assigned Names and Numbers (ICANN) is the final organization responsible for IP address
assignment. If the network to be built is an internal private network, users do not need to apply for IP addresses. However, IP
addresses cannot be assigned at random. It is recommended to assign dedicated private network addresses.
The following table lists reserved and available addresses.
Class
Address Range
Status
Class A network
0.0.0.0 - 0.255.255.255
Reserved
1.0.0.0 - 126.255.255.255
Available
127.0.0.0 - 127.255.255.255
Reserved
Class B network
128.0.0.0 - 191.254.255.255
Available
191.255.0.0 - 191.255.255.255
Reserved
Class C network
192.0.0.0 - 192.0.0.255
Reserved
192.0.1.0 - 223.255.254.255
Available
223.255.255.0 - 223.255.255.255
Reserved
Class D network
224.0.0.0 - 239.255.255.255
Multicast address
Class E network
240.0.0.0 - 255.255.255.254
Reserved
255.255.255.255
Broadcast address
Three address ranges are dedicated to private networks. These addresses are not used in the Internet. If the networks to
which these addresses are assigned need to be connected to the Internet, these IP addresses need to be converted into
valid Internet addresses. The following table lists private address ranges. Private network addresses are defined in RFC
1918.
Class
Address Range
Status
Class A network
10.0.0.0 - 10.255.255.255
1 class A network
Class B network
172.16.0.0 - 172.31.255.255
16 class B networks
Class C network
192.168.0.0 - 192.168.255.255
256 class C networks
For assignment of IP addresses, TCP/UDP ports, and other codes, refer to RFC 1166.