Line sequence error leads to Winscp/putty remote software sins!

Today at the company encountered such a problem:

A colleague Workstation computer, when using WINSCP software, the remote upload file is not responding, error prompts, exceeding the 15seconds connection notification, establish a close connection to optimize the cache size settings.

This is the first time I encountered this problem, in addition to this performance, the computer has no other symptoms, the first colleague thought it was a system problem, re-installed a system, but, the problem is still, so find our department, I put the computer to my station, studied the good for a while there is no problem, At most do some system bug patch repair, some WINSCP connection configuration, and then tried, hey, incredibly can use, but I have a kind of excitement and there is a kind of inexplicable, what is the reason?

So fart fart on the back of the machine, the result of how, the problem is still, the speed is particularly slow, there is no way to the online Bing Ah Baidu Ah, unfortunately did not find the exact thing. Helpless under can only find my department of a predecessor, rinsed, the diagnosis in addition to the problem from the non-soft injury, Ah, the original colleague station connected network cable sequence has a line Line 2 and Line 3 wrong.

We should all know, for now most can automatically recognize the TX and RX (data upload and data download) network equipment, now network equipment used standard RJ45 is generally straight line, and straight line to take the standard 158b line sequence, white orange orange white green blue white blue green white brown, wherein the network port module standard corresponding is , one line and Line 2 line are tx+ and tx-, respectively, line Line 2 and line Line 6 are rx+ and rx-respectively.

That is, even segment equipment, the performance of the straight line: Tx+--tx+,tx-—— tx-,rx+--rx+,rx-—— rx-. Twisted pair Performance: tx+--rx+, Tx-—— rx-,rx+--tx+,rx-—— tx-(thus reducing signal attenuation, enabling further and gigabit network transmission)

In this way, if we have a Line 2 line sequence and the line Line 3 is reversed, then there will be the following performance, tx+-tx+,tx--rx+,rx+-tx-,rx--rx-. So that a pair of data can not guarantee normal transmission. There are also the problems encountered above:

Computer network use without any problems, but the speed is obviously very slow, whenever using WINSCP or putty similar remote software upload or download things, small files may not be a problem, but once a little bit larger will appear long time unresponsive but not completely disconnected.

and so a small problem, but also reflects, when we because something is a headache, perhaps the opposite, from the simple start, the problem will be welcomed The blade and the solution. But also only enough experience, consider the problem enough comprehensive, can be efficient to complete the work, here I hope that no matter what you can do with a sober mind to face all work problems!

--The Countryside pig

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Line sequence error leads to Winscp/putty remote software sins!