You can configure IPv4 addresses on network devices to implement data communications between network devices. In addition, you can improve network security by controlling ICMP packets and IP packets carrying route options.
Internet Protocol version 4 (IPv4) is the core protocol of the TCP/IP protocol suite. All TCP, UDP, IGMP, and ICMP data is carried in IP packets. Devices on different networks use IP addresses for communication. In addition, to ensure the security of the TCP/IP protocol suite, you can defend against network attacks by controlling ICMP packets and IP packets carrying options.
This section describes how to configure conflicting IP addresses for different interfaces after the IP address conflict detection function is disabled as well as to configure the preemption function so that conflicting IP addresses take effect on the interfaces with higher priorities.
You can configure the policy for sending and receiving host packets to control the selection of tunnels and the forwarding mode for transmitting host packets.
In scenarios in which an interface needs to receive and forward directed broadcast packets from the directly connected network segment, enable this function.
The hardware copy function allows a device to forward the protocol packets to be broadcast through hardware instead of sending them to the CPU, achieving fast forwarding.
To easily observe the inbound interface of a device along the path, you can configure the IP address of the inbound interface for forwarding packets as the source address of an ICMP Time Exceeded message.