Device and method for guaranteeing normal communication of Ethernet

Abstract

The invention provides a device and a method for guaranteeing normal communication of Ethernet, which are based on filed programmable gata array (fpga) chips. The device comprises a transmitting port, a receiving port, a control circuit and a self-consultation detection circuit. The method includes: 1 judging whether comma alignment is completed; 2 transmitting a first data pulse of a fast link pulse (FLP) from the transmitting port, wherein if the receiving port receives the first kind of data pulse of the FLP, the step goes to a step3 after self-consultation successes; otherwise an opposite terminal does not have a self-consultation function, and the step goes to the step 3 also; and 3 monitoring information in a link, wherein if self-consultation sequence data pulses are detected, the step goes to the step 2, a buffer zone is started. The device and method for guaranteeing the normal communication of the Ethernet can analyze the FLP pulse no matter no matter under the condition of power-up initialization or normal communication and guarantee normality and reliability of link communication.

Description

technical field [0001] The invention belongs to the field of network communication, and in particular relates to a device and a method for ensuring normal communication of the Ethernet. Background technique [0002] The self-negotiation process of Gigabit Ethernet refers to the fact that the local network device sends information to the peer device to inform itself of its communication mode and communication capacity at the beginning of the link connection, and at the same time detects the communication information sent by the peer device and parses out the peer device. The process of communication mode and communication capacity of the terminal network; for Gigabit Ethernet equipment based on electrical or optical ports, its auto-negotiation priority is generally 1000BaseT(X) full-duplex -> 1000BaseT(X) half-duplex . [0003] The basic mechanism of the auto-negotiation function is based on encapsulating the negotiation information into a series of modified test pulses c...

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Problems solved by technology

[0006] Most of the reasons for the auto-negotiation failure are that the A link end is forced to set to no auto-negotiation mode and the B link end works in the auto-negotiation mode, then the result is that the B link end has been sending FLP pulses and has been listening to A The FLP pulse of the end, because the A end has been forced to set and cannot change the existing module, so the two ends of A and B form a "stalemate" state, and the result is that the negotiation fails; another reason for the failure of the self-negotiation is that the communication between the two parties is normal In some cases, the A link end enters the power-on state due to a shutdown for some reason. At this time, the auto-negotiation action starts, and the B link end does not have the ability to monitor the FLP pulse under normal communication conditions. Establish

[0007] The patent No. ZL200510033695.4 and the invention titled "Gigabit Ethernet port connection method" discloses an Ethernet communication method. If the device does not establish a connection with the peer within tens of milliseconds after the It is not correct to use the optical signal to determine whether to force the full-duplex mode of Gigabit Ethernet. The method of breaking away from the protocol characteristics according to the processing time is not correct. It is necessary to judge whether it is necessary to enter Gigabit Ethernet according to the type of comma on the current link. The full-duplex mode, that is, according to the comma is the instruction set C code or I code defined by the IEEE802.3 standard; secondly, this method does not deal with the situation where the opposite end abnormally appears in the instruction set C code in the full-duplex mode. deal with

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