Method for processing three-layer ethernet switchboard direct connection host computer routing

Abstract

The invention discloses a processing method of connecting a switch with Ethernet that has three layers directly to a host computer route, which is used for preventing a data packet whose aim IP is an IP address of the host computer from being washed into a CPU If the switch with Ethernet that has three layers has an ARP of a directly connected host computer but has no MAC of the computer host, comprising the following procedures: (a) a switch receives an address resolving protocol (APR) packet delivered by certain equipment, learns APR information from the APR packet and get a corresponding media access control (MAC) address according to the IP address in the APR information; (b) the switch searches a MAC table on the MAC address according to the MAC address, if the MAC address of the equipment can not be learned, then a direct route of the IP address is added, so as to lead the switch desert the information when the information is transmitted by the switch through the directly connected route. By adopting this method, the operation of the switch is not affected when the CPU can not process other packets.

Description

technical field [0001] The present invention relates to Ethernet communication technology, in particular to a processing method in which MAC (Medium Access Control, Media Access Control) does not exist when a host route is generated through ARP (Address Resolution Protocol, Address Resolution Protocol) on an Ethernet switch. Background technique [0002] With the rapid development of the Internet, Ethernet networks have gradually become an indispensable tool in people's daily work and life, so the demand and processing capacity of Ethernet switches are also increasing. At the same time, various manufacturers are trying to reduce costs. Improve the cost performance of products. With the rapid improvement of ASIC chip design technology, the second and third layer forwarding of Ethernet switches are basically completed by the chip, and the CPU basically does not process data forwarding on the switch, and is only responsible for some functions such as control management and forw...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned three-layer Ethernet switch has ARP but no MAC. The traditional method is to set up the routing exit as the CPU. In fact, this method has a very big weakness. Suppose the destination IP of a certain data flow is the direct connection network of the switch. The IP address in the segment, and the data flow is very large, but at this time the switch has learned ARP, but has not yet learned the MAC stage. At this time, the egress of the routing establishment points to the CPU, so this large traffic All will be flushed to the CPU. If the CPU processing capacity is average, but the traffic flushed to the CPU is very large, then the CPU may have been busy processing these packets flushed to the CPU, and there is no time and opportunity to learn the MAC of the device corresponding to the destination IP. There is no chance to modify this route to the CPU, which will form a vicious circle, causing this route to fail to be established normally for a long time, causing such data flow to impact the CPU for a long time, and causing other protocol packets that should be sent to the CPU to be normal. Sending and receiving and processing will also cause the CPU to be occupied for a long time and other events cannot be processed normally, etc., the consequences are very serious

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