Learning method, device and system of message

Abstract

The invention provides a learning method, a device and a system of message. The method comprises receiving the message carrying a physical address of a host computer in the network, identifying priority level of the message according to identification information in the message, and judging whether a cache table has memory space. If the cache table has the memory space, the message and the priority level of the message are learnt. If the cache table has no memory space, the priority level of the message and the lowest priority level in the cache table are compared. If the priority level of the message is higher than the lowest priority level in the cache table, the message and the priority level of the message are learnt to a position corresponding to the lowest priority level in the cache table.

Description

technical field [0001] The present invention relates to the communication field, in particular to a message learning method, device and system. Background technique [0002] In the TCP / IP network architecture, the Address Resolution Protocol (ARP) is a basic protocol under the Internet Protocol Version 4 (IPV4), which obtains the corresponding physical address through the IP address. Under the TCP / IP network architecture, each host is assigned a 32-bit IP address. This IP address is a logical address to identify the host. However, in order for the message to be transmitted on the physical network, the purpose must be known. The physical address of the host, so there is a problem of how to convert the IP address into a physical address. Taking the Ethernet protocol as an example, it is stipulated in the Ethernet protocol that if a host in the same local area network wants to communicate with another host, it must know the Media Access Control (MAC) address of the target host...

AI Technical Summary

Problems solved by technology

[0006] After obtaining the physical address of the destination host, the physical address of the destination host needs to be stored in the local cache table. IPV4 is the ARP cache table, and IPV6 is the neighbor cache table. However, in the actual process, there may be ARP cache table resources Insufficient, or insufficient neighbor cache table resources, resulting in communication failures

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