Ethernet interface butt-jointing method

Abstract

Being related to Ethernet communication technique, the invention discloses method for end-to-end connection to Ethernet interface. In time to connect to Ethernet interface in end-to-end, if opposite terminal is as forcible mode, this end of supporting self arranged mode can make correct match for mode of end-to-end connection. Based on whether great lot ultrashort error packets occur in short period of time, the invention determines whether current duplexing mode in port of end-to-end connection is in match. Meanwhile, the invention refers to whether current rate of receiving and transmitting packets reaches to a certain threshold in order to make determination more correctly. If being unable to knowing duplexing mode in opposite terminal, the port of supporting self arranged mode utilizes full duplex mode as default value. After finding that full duplex mode is not matched, the invention changes mode to half-duplex mode.

Description

technical field [0001] The invention relates to an Ethernet communication technology, in particular to a method for connecting an Ethernet interface. Background technique [0002] Since the 1980s, Ethernet has always occupied the dominant position of LAN due to its low cost and flexible characteristics. The Ethernet protocol has become the de facto standard of the LAN protocol, and Ethernet has become synonymous with the LAN. [0003] According to the Institute of Electrical and Electronics Engineers (Institute of Electrical and Electronics Engineers, "IEEE") 802.3 standard, the Ethernet interface has two modes: auto-negotiation mode and mandatory mode. [0004] An important difference between the auto-negotiation mode and the forced mode is that the code streams sent by the two when establishing a physical link connection are different. [0005] When one end of the connected device is set to auto-negotiation mode, after power-on, the physical layer first uses the parallel...

AI Technical Summary

Problems solved by technology

[0008] When the port configurations at both ends of the connected device are inconsistent (for example, one end is auto-negotiation, the other end is non-auto-negotiation, or an old-fashioned half-duplex HUB is connected), the IEEE802.3 standard does not specify this situation, and the result The speed of the two parties connected can be correctly matched, but the duplex mode cannot be guaranteed to be consistent, that is, one end of the self-negotiation can use parallel detection to determine the correct line rate, but the duplex mode will be forced to be set to half-duplex; if the other end is full-duplex If the connection mode is inconsistent, that is, the self-negotiation end is half-duplex, and the non-auto-negotiation end is full-duplex. This kind of connection will not expose the problem when the network data traffic is small, so it will not be noticed. As the traffic increases, there will be problems such as line one-way or serious failure

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