Configuration Guide Configuring IP Addresses and Services
Subnet Mask
A subnet mask is also a 32-bit value. The bits that identify the IP address are the network address. In a subnet mask, the IP
address bits corresponding to the bits whose values are 1s are the network address, and the IP address bits corresponding
to the bits whose values are 0s are the host address. For example, for class A networks, the subnet mask is 255.0.0.0. By
using network masks, you can divide a network into several subnets. Subnetting means to use some bits of the host address
as the network address, thus decreasing the host capacity, and increasing the number of networks. In this case, network
masks are called subnet masks.
Broadcast Packet
Broadcast packets refer to the packets destined for all hosts on a physical network. Ruijie products support two types of
broadcast packets: (1) directed broadcast, which indicates that all hosts on the specified network are packet receivers and
the host bits of a destination address are all 1s; (2) limited broadcast, which indicates that all hosts on all networks are packet
receivers and the 32 bits of a destination address are all 1s.
ICMP Packet
Internet Control Message Protocol (ICMP) is a sub-protocol in the TCP/IP suite for transmitting control messages between IP
hosts and network devices. It is mainly used to notify corresponding devices when the network performance becomes
abnormal.
TTL
Time To Live (TTL) refers to the number of network segments where packets are allowed to pass before the packets are
discarded. The TTL is a value in an IP packet. It informs the network whether packets should be discarded as the packets
stay on the network for a long time.
Features
The IP protocol can run on an interface only after the interface is configured with an IP address.
Broadcast Packet
Processing
Broadcast addresses are configured and broadcast packets are forwarded and processed.
ICMP packets are sent and received.
Limiting
Transmission Rate of
ICMP Error Packets
This function prevents Denial of Service (DoS) attacks.
Maximum Transmission Unit (MTU) of IP packets on an interface is configured.
The TTL of unicast packets and broadcast packets is configured.
Source routes are checked.
1.3.1 IP Address
IP addresses are obtained on an interface in the following ways:
To Next Page
Loading...
