Shulou(Shulou.com)06/01 Report--

Network engineering, the four words sound high-end atmosphere, in fact, how much bitterness and joy behind it is known to the layman.

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Many engineering universities and comprehensive universities will have such a major called network engineering, in the eyes of a thorough layman, network engineering is a computer major, working on computers all day long; to the ordinary layman, network engineering is it,it is typing code; in the eyes of young people, it is *; and repairing computer cable. Every time I hear this, I feel very helpless, because in a sense, in this era, network engineering is a marginal industry, so it is normal for laymen not to understand, but I still want to write this article to talk about personal understanding and feelings.

In Baidu encyclopedia, the definition of network engineering is

Network engineering refers to the project that designs, develops and solves network system problems with engineering ideas, methods and methods as planned. To cultivate and master the basic theories and methods of network engineering and the knowledge of computer technology and network technology, and to use the knowledge and skills learned to analyze and solve relevant practical problems. Senior network science and technology personnel who can engage in the research, teaching, design and development of all kinds of network systems and computer communication systems in the information industry and other departments of the national economy.

The definition is very accurate and formal, my understanding is that network engineering is an available communication network for computers and other information equipment to complete a variety of information exchange and intelligent control and monitoring disciplines. There are mainly routing switching, security, wireless data center network, sdn and other branches.

Problem 1: non-professional intervention and cost reduction

In fact, this is a very important job that requires professionals to complete, but in our country, network engineering network technology has been seriously ignored, because the network center belongs to the business support department, not a money-making department. Many bosses regard the computer room as a storage room, without precision air-conditioning anti-static floors, not even cabinets. Many small units do not have full-time network administrators, directly find some self-righteous non-professional young people to engage in the network, and then make a mess of the network. Many small units take a broken soho route when a bunch of 8 stupid switches are connected below the total exit, with 30 to 40 users, finish the project (in fact, I don't think this is a project), the network card is not good, and then yell what's going on By comparison, the enterprises that use industrial computers to do soft routing are not bad, and even the wiring is also done by those decoration companies in order to save money, holding aluminum wire to do the network wire, the bottom of the cabinet into a water curtain hole.

Most enterprises still have some insight, will find some decent integrators to do the network, and then reluctant to give up money, spend a lot of time to put pressure on network managers, let integrators compress and re-compress, for example, obviously want to go on the S5720 ei machine, not compressed into S5720 li, Huawei Hua3 compressed into tp, integrators forced to use inferior network cable because of the cost. Enterprises with a poor budget to expand the network, later problems, shouting that the network administrator technology is not good, it is obviously the consequence of your cost reduction.

Put some pictures and feel it.

A computer room of a 60-person enterprise

The computer room of another small company

This is a good one in a small business.

The above pictures were all taken in 2018.

Problem 2: professionals are not up to standard

Network managers mainly come from two aspects, one is network engineering graduates with professional background, and the other is from other departments such as communications development. However, they all have their own weaknesses.

Since those with a professional background come from colleges and universities, most people naturally have the theoretical foundation of network technology, but it is very difficult for their school to give them the knowledge that can keep up with the times, mostly from ten or two years ago. I can't agree with this that no matter how the network technology develops, it's true that the bottom has not changed. I very much support the school's basic theory of the network, but if the outdated technology outside the theory has to be introduced, then I hope the school will repeatedly emphasize that this is an outdated technology. Once there were graduates who made a twisted pair and stared at the 568a and 568b wire sequence after going to work. I had no idea that the current equipment supported port flipping, usually using 568b straight lines. Those new technologies really have nothing to do with those outdated technologies, so stop playing the same shield at the bottom. Many schools also train Internet workers in front of soft workers, you have to say that learning python is still useful, but break C++ java every day, I really don't know what the school thinks. In addition, most of the graduates do not have practical experience, for this point, really can not be forced, the current digital communication equipment without practice, the technology will not really understand.

The biggest problem of changing careers is that there is no technical basis, not even the most basic configuration method, vlan lines do not know how to connect, vlan must be equipped with vlanif on layer 2 devices (not referring to the vlan1 management address), do not know the save storage configuration after configuration, and so on. In fact, they are OK, at least have this aspect of thinking.

Problem 3: impetuous people and industries

In order to cater to those unprofessional users, today's manufacturers have produced a lot of unprofessional equipment. For example, H4C has to produce an er series, saying that it is an enterprise-class router, and then marked with double wan under it, which is ridiculous. Wan is clearly a product produced by household equipment for the convenience of rookies, and must be used in enterprises. The real router is what it looks like in the simulator, there is no default address, the beginning must be console, networking must be manually configured nat, there is no concept of wan port. Even the tp device doesn't even have a console port, and the youngster is even more proud: ha, the enterprise network is so simple. Come and go, the professionals in the network field are ignored, the salary is sometimes similar to that of the doorman, and the professionals themselves are impetuous, do not concentrate on technology, and think only of "crooked ways", so their status will only be lower.

For certificates, many people are just surprise study, memorization database, after long live, there is a hcnp wlan asked what is the management of vlan business vlan. Baidu, hcnp you will see:

An eyeful of training institutions have trained so-called rapid network engineers, and then the quality of the entire industry has been dragged down. many newcomers who really hold the dream of technology lose themselves, and those who adhere to their dreams are also difficult to prove their strength. often submerged in the vast crowd because of education and so on.

Question 4: about SDN

Baidu encyclopedia:

Software defined Network (Software Defined Network, SDN) is a new network innovation architecture of Emulex network and a way to realize network virtualization. Its core technology OpenFlow realizes the flexible control of network traffic by separating the control plane of network equipment from the data plane, and makes the network become more intelligent as a pipeline.

At present, sdn is very hot in the industry. It seems that sdn is a great savior. Many people don't even know an arp, so they talk a lot about sdn. Is such a person qualified? At present, sdn technology is very immature, do you really dare to use it in production network? The career certification page of Huawei's official website is as follows:

It can be seen that even Huawei itself did not launch the relevant certification of sdn, indicating that the relevant technology is immature, in this case blind hype of sdn will only hurt others and themselves.

And even if sdn matures in the future, I personally think that sdn is suitable for data centers and super-large enterprises, and the loss of sdn for enterprises below medium size will only increase the failure rate of the network. The traditional Datong network is redundant and mature, while sdn gives the lifeline of the network to the controller program. No matter how perfect the controller is, it can not avoid bug. Once bug appears, without reliable technical support, the network is basically finished. Therefore, I think it is completely worthless for sdn to approach ordinary enterprises, and it is more reliable for enterprises to use serious network equipment.

Some technology websites describe sdn as big thunder and little rain, which also confirms this law. Even an ipv6 can not be promoted, how to talk about what sdn promotion.

Summary

There is still great hope for network engineering, as long as the informatization advances further, the network will be paid more and more attention. We network engineering professionals need not worry too much about the fate of the network industry, which will never decline in 30 years, but let us not be too confident. We must learn new technologies and learn them well in order to stand in the upper reaches of the times. The downward trend of the industry in the past two years can also cool down the hot network and brake the impetuous wind. I believe that there will be a new spring in the future.

-time is limited and needs to be replenished.

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