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

The work of growing up as a network engineer

After joining the job, your direct leadership is very important to you. The working status of a network engineer depends entirely on the leader. Having a good leader can show you a way in confusion. So communicate more with leaders, whether at work or in life. As the saying goes, knowing people and making good use of people, the leader does not understand how you can make the content of your job equal to your ability, and how to give you a job can not only show your ability, but also challenging, but also conducive to your growth.

After working, you will find that the circle of doing the network is actually not big, only those manufacturers, only a few companies that do well in a place. A large integration project is divided into network part and security part and server. If you think about it, there are only a few brands of network equipment (Cisco huawei,H3C, Ruijie. ), it's all routing and switching. Security devices are firewalls, DDos,ips,ids, × × devices, database audits, fortress hosts, AAA and so on. Advanced security is also possible because the price is high, and not many brands are basically made in China. These things are generally debugged by manufacturers or agents (this mainly depends on pre-sale and sales).

Generally speaking, new entrants should first understand the ongoing project, see, listen, think and observe more. Large companies have distinct positions, after-sales engineers do after-sales things, pre-sale things do pre-sales things, sales do sales things, project managers do project managers, they should specialize in the technical industry and do their own things well, coupled with a sound process, work efficiency will be much higher. When I was a child, I learned an ancient proverb, hawking you Weng, always doing the same thing, practice makes perfect. In some companies, you are involved in many jobs, the advantage is that you can learn all aspects of knowledge, bad is many but not proficient, people's energy is limited after all. As the saying goes, everything means you don't know anything. See the next article on how to learn.

Smaller projects are not technically demanding, but you can learn some experience in project management and coordination. For large projects, if Party A specifies the brand Cisco,huawei,H3C, which is medium and high-end equipment, and Party A does have people who understand it, they will generally have higher requirements for network quality and various security strategies. You need to have a clear control over the overall network structure and configuration of the project, and you need to plan in advance, how to switch the equipment when there is a problem, how the traffic goes, write a document, and write a copy of each manufacturer's equipment, because of the principle. The configuration method is different, providing configuration speed and self-sorting, which is of great help to you. You may have encountered it that day, and it is also a method of memory at the same time.

The issues considered during configuration, such as switching part IP address division, vlan partition, spanning tree, layer 2 security, link aggregation, nat, routing, spanning tree, vrrp,dhcp and anti-DHCP spoofing, acl,snmp, etc., as well as managing network segment design, whether it is telnet or ssh, hanging ACL under vty when appropriate, ensuring device management security, etc., in short, it is a matter of route switching and security. As far as you can think of, you can use the simulator to build the environment, the configuration method to pull down by yourself, to the site debugging if the memory is not very clear, you can check. In particular, I would like to remind you not to memorize orders, but to remember the principles. Beginners must be familiar with the basic commands to improve the speed and accuracy of configuration. Forming such a good habit is of great help to your work and study. Don't think about Baidu after arriving at the scene, there is almost no external network in the new place, and it is difficult to check. Before you go, you must know the situation on the spot, what brand and model of equipment you use, what kind of things you need to bring, what structure of the network, what content you need to configure, and have a mental preparation. It is best to write a txt in advance, which is convenient and convenient. You don't have to write if you think you can use your brain. Specifically look at the requirements of Party A, and whether to understand the network, their own experience. Specific analysis of the specific situation. When the working conditions are ripe for a period of time, your ability may also allow you to go to the presales or project manager, depending on your personal wishes and abilities.

On-site operation and maintenance, this is a sensitive topic. Let me talk about what we all know, first of all, let's talk about the bad aspects. Party A needs to stay in the factory, and the network situation is generally more complicated. It's not cost-effective to recruit one or several people by yourself. Anyway, it's not cost-effective. Anyway, it's not cost-effective. You have to be careful when you do operation and maintenance. To put it bluntly, Party An is satisfied, and your boss is satisfied. How to make Party A satisfied is a painful thing. The better manufacturers are better, one person one thing, I will maintain the equipment, the equipment is fine, nothing else. Bad manufacturers will struggle, for example, the computer can not be connected to the Internet to call you, you used to see that the network cable was not plugged in, installed the system, installed software, computer poisoning also found you, all kinds of problems, you are embarrassed to shirk, meritorious service and hard work of their own boss does not know, promotion and salary increase is not you, the work is not happy. The good news is that you can learn a lot from these little things, and not all the problems can be solved. You can solve them by inquiring with du Niang and so on. It is easy to work for a long time, and the last thing you learn also depends on the scale of the network you maintain (security devices, servers, configuration content, etc.). So many people change their posts or leave their jobs after working for about a year, depending on the individual, understand?

Different ways of network maintenance are different, some are difficult and some are simple. When some maintenance, communicate with the person in charge of Party A, coordinate the time window, and simply finish the configuration change. If you can make a phone call to solve the problem remotely, you don't have to run errands, which saves the company cost. Some important networks have to write the splicing plan in advance, and Party An examines and agrees to the splicing risk and return plan, meets again and again to decide to cut the time window, strictly follow the splicing plan to do, lose their heads, do not allow any carelessness, have to experience strong psychological pressure.

Network inspection, see Party A contract requirements, regular equipment CPU, memory, configuration backup, server backup, log analysis and so on. Some people think it's useless, but sometimes it does work. For example, the server hard disk is broken, the bad piece has raid, if it is not found in time, many pieces of broken, raid can not restore how to do.

Whether it is a small network or a large network, be sure to make a configuration backup before configuration, save it after configuration, and write maintenance documents. You will be miserable if you encounter someone who feels that the network speed is slow, habitual restart and power outage. What is configured, what is wrong, and then write about your feelings, these things are not for others, but for yourself, and you can grow up unconsciously.

Different Party A has different requirements for the network, some cost is low, just use some silly HUB cascades, the network can PING, the security is poor, the use of many people is slow, but also call you to repair every day, all kinds of problems can not be found. Some cost is high, use good equipment, do a good job of vlan, spanning tree, layer 2 security, link redundancy, VRRP, double interconnection, etc., access to the Internet is not stuck, there are problems on the device, a few commands, see how the log is probably where the problem lies, generally will not have a problem, and good scalability. The same is to do the network, the gap is so big.

It is not easy to do network maintenance. some of Party A's equipment is messy, there is no label on the line, there is no description in the configuration, we can only check through arp table and mac table, how to connect, which line is wrong. Ask the people of Party A, what kind of network structure, how to connect, Party A foolishly do not know, will tell you that there is a problem, a little faster and a little slow, but not on the Internet, and so on. No matter how capable you are, you will be fooled in an instant. Find a person who knows, may move a line plug, or restart, and so on, instantly the network will be fine, and the ability of others will be strong. This is the degree of familiarity and understanding of a set of networks. The more familiar you are, the faster the problem will be located and the faster you will troubleshoot.

Whether it is new projects and network maintenance, network transformation and expansion, experience is very important.

I have operated and maintained the DCN network of a certain operator, in which there are three or four hundred network equipment, and basically everything that CCIE learns has to be used. Many are Cisco Huawei, juniper and other high-end equipment, this network problems did not recover in time, not ordinary people can bear, the risk is too high, too much pressure ah. Served as a regional finance bureau data center construction project manager, with a total investment of more than 17 million, network equipment and security equipment related to 7 major manufacturers, access equipment more than 1500 sets, the first case in the country to use 3G-VPDN networking mode, traffic control bureau and data center links, system information security level 3 (what level 3 is to ask Duniang yourself), it is common to be busy and tired to take the last subway home. He has done the office network maintenance of a scientific research institution, served as the network maintenance of the headquarters of state-owned enterprises in a certain area, and other small projects, which are not worth mentioning.

The literary talent is not high, the level is limited, there are people outside the people, there are mountains outside the mountains, Daniel do not despise. Send and write with feelings, so that new friends can take fewer detours and work smoothly. If there is anything wrong with this article, please leave a message and point out that we should communicate with each other, learn from each other and grow up together.

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