Network Equipment Equipment Maintenance

Whether it is a LAN, a metropolitan area network or a WAN, it is generally composed of network connection devices and transmission media such as NIC, hub, switch, router, cable, RJ45 connector, etc. Following the growing scale of the network, the number of devices that constitute the network in a rapid expansion of equipment, the variety is also constantly refurbished, may be the day-to-day maintenance of this series of equipment, without regular maintenance of them, days long will cause a lot of inexplicable fault, not to mention this series of faults hidden high, not easy to find, Cause you a headache. May encounter unexpected circumstances, such as thunder and lightning, if you often do not have enough protection measures, perhaps immediately reimbursement of your equipment.

The so-called: "Often do not burn incense, cramming", wait until the network ability drops, network service terminates, you have to rush each network equipment, this will consume a lot of manpower, material resources, and very difficult in a short time accurate positioning influence ability, service equipment failure, light delay the normal work, Heavy will cause equipment damage, causing significant losses, so, the day-to-day maintenance of network equipment is a key point that can not be neglected.

As the saying goes: "Guard against the", network equipment, such as everyone in the body of every part of the organs, every organ healthy and normal everyone's body to the Qi Huoxue. As well as the network, only the network card, hub, switch, router, network cable, RJ45 connectors and other networks connected equipment and transport media normal operation, the net will be unimpeded. We personally understand that by doing exercise, pay attention to health, safety, regular physical examination to maintain the physique of the individual, when the network equipment should be how to maintain it? I believe that the protection of power, lightning, anti-static, dust-proof, electromagnetic interference, moisture-proof and so on measures are not one can be less.

　　Anti-Power

In the current situation of low power supply, electricity to the enterprise implementation of power rationing is a common problem, not to mention the supply process due to the lack of voltage will also occur when the intermittent, the power is high and low (voltage is low, such as less than 150V, or too high, such as higher than 260V) The instability of doubt, And because the power supply is often unstable will lead to the LAN routers, switches, servers and other types of equipment can not be continuously normal work, light affects the quality of the Internet, long-term so will greatly shorten the life of the equipment. So to ensure the "health" of network equipment, they will be equipped with a good and stable ups power system. UPS power can handle power grids such as: power outages, lightning spikes, surges, frequency shocks, voltage mutations, voltage fluctuations, frequency drift, voltage drop, pulse interference and so on, and sophisticated network equipment is not allowed to have intermittent power, so the server, large switches, The router is the core of the network Center to be equipped with UPS is self-evident.

The protection of network equipment God ups easy to use but also relatively fragile, scientific maintenance and maintenance will prolong the life of UPS. Maintenance practices include: Try not to pick up the inductive load. Should not be full load or excessive light load, long-term full load state with direct impact on UPS life, in case, the online UPS load should be controlled in 70%~80%, and the backup of the UPS load should be controlled in 60%~70%. There are also to protect the battery, although the surface it does not have to maintain, but poor care, as will be wrong, the battery is required in the 0~30℃ environment, 25 ℃ the highest efficiency. Therefore, in winter and summer must pay attention to UPS working environment, high temperature will shorten the battery life, temperature is low, with less than the nominal delay. There are also regular maintenance, may not be a long-term local power outages, must be regularly three months of artificial interruption of power supply, so that ups with load discharge. Finally, the UPS should be placed in a good ventilation and cooling place.

　　Anti-Lightning

Multi-mined areas in China is not uncommon, taking Guangzhou as an example, the annual average thunderstorm weather can reach 80.3 times, so because of lightning damage to enterprises and internet cafes owners a lot. According to the Qno technology engineers, 30% of the network equipment failures are always linked to lightning. Now overhead access to a variety of building data transmission lines (such as power lines, electrical cords, signal lines, cable, telephone lines, etc.) for a long time exposure distributed in the protection of lightning devices outside the scope, very simple under the intrusion of lightning. May not be enough lightning protection measures, the damage caused by lightning attacks on the network equipment will be very heavy, may directly cause the server, switches, hub and network card equipment such as the burning and the long period of paralysis. Sometimes lightning strikes caused by the voltage is not enough to hit the network device, even if there is no network failure,

However, over the past pressure network equipment, very simple will lead to the aging of network equipment parts, the network equipment to promote a sharp decline in service life, and the old equipment quite simple suffered a breakthrough, seriously affecting the stability of the network capacity.

The Lightning protection method of network equipment is to do well the grounding device of equipment and to install an effective lightning protective system. The 1th step is to do the security of network equipment grounding, but also to use wireless AP as a signal bridge to reduce exposure. Also, the network Lightning protection system is broadly divided into power lightning protector and Network Lightning Protector, respectively, to protect the network power and network signaling systems. For the protection of High-precision network equipment, they have to be in their power to type the end of the power to set the Lightning protection device, this can be used along the power line to attack the lightning over voltage intrusion waves protected outside. And the network Lightning Protection device is broadly divided into air gap and semiconductor type, at present, the network of lightning protection devices to take more than the same device combination into three-level mode, the first stage by the flow of the gas discharge tube for primary protection, to reduce residual pressure and the large area of lightning discharge into the earth; The second stage adopts the decoupling resistor or PTC to carry out the delay and partial pressure to meet the characteristic needs of the first to third level components; the third stage adopts TVs for fine protection to further reduce the residual pressure, so that it reaches the safety voltage of the equipment. For example: US (JaRa) 3207 Terminal Equipment Lightning protection device, ping-yu sj05ff4h into the layer of lightning Protection, Leixun (ASP) RJ45-XE series Backbone Lightning protection device is always a good choice.

　Anti-static

We always know that electrostatic discharge (electrostatic discharge,esd) is very simple to cause the computer and peripherals hardware damage, so, network equipment as difficult to escape static fate. Static electricity is ubiquitous, the above mentioned natural lightning is a strong convection climate typical of the ESD problem, but the daily life of the ESD problem is also frequent occurrence. Following the progress of the network device chip process, the speed and function of the chip must be improved, but the chip becomes rather fragile. A not too high ESD voltage can be used to penetrate the transistor, a not too large ESD current can be used to fuse the wire. Since static electricity is the invisible killer of the network equipment, when, everybody often must carry on the effective maintenance and the maintenance to the network equipment, and must take the correct precaution measure.

(1) Each part of the network equipment should maintain good contact, to have a reliable grounding. Key equipment that is susceptible to ESD should be shielded and quarantined at its periphery.

(2) The northern region in the autumn and winter season should use humidifier, to maintain indoor air must be humidity, to prevent static electricity in the equipment, furniture and physical accumulation of substantial.

(3) to open the equipment for maintenance, the standard practice is to wear anti-static gloves, can be, for the vast number of ordinary netizens, you can cut off the power, and put your hand on the wall or water pipe for a while to let go of their own static electricity.

I personally have encountered such a case, can be due to static electricity caused by the loss of router settings parameters. The author group's local area network, take the ADSL PPPoE way to connect, use the router to share the Internet, moreover all computers all pass through the switch to connect the router, has used for nearly two years, has behaved normally, may be the winter in the future always appears the router setting parameter loss causes not to be able to surf the Later found all the network equipment is always placed in a place, and the computer wiring staggered together, so immediately alert may be the bane of electrostatic, immediately put the router and switch to one side, after the power off clean, fixed installation, fault handling.

Dust protection

Dust, the extent of its harm is not to be underestimated. Therefore, routers, switches and other network equipment dust removal Kungfu is also very important, may be too much dust, dust cleaning and can not be very timely, your network will appear most strange fault, serious even burn the chip inside the device. Perhaps you think the author said to the router, the switch harm is "alarmist", when you believe the network card. When the computer is working, it will produce the necessary electrostatic field, magnetic field, coupled with power and CPU fan operation generated suction, will be suspended in the air dust particles into the chassis and stranded in the host, video card and network card. may not be regularly cleaned, dust with the accumulation of more, serious, even will make the insulation capacity of the circuit board, lead to short circuit, bad contact, mildew, resulting in hardware failure. Therefore, the chassis should be opened regularly, with a clean soft cloth, not easy to hair removal of the brush, blowing balloons and other software for the chassis components, including the card to dust.

may be the network card for a long time to clean up, too much dust, coupled with air humidity, will lead to a chip on the network card chips between the short circuit, and the motherboard can not be quite good for data exchange, there will be a lot of strange network questions, serious will be reimbursed network card. Also, other network equipment is the same, to frequent dust, such as Crystal Head, routing, switch interface and so simple "possession of inquiry" place to pay considerable attention to maintenance. May want to remove the router, switch panel of dust, can be used damp soft cloth and neutral high concentration of lotion to wipe, wipe after wiping with clean water, residue on the top of the lotion to help isolate the dust, the next time cleaning only with a wet towel to wipe the good.