Wear protective armor for Routers

For some places for business, such as Internet cafes, retail businesses, and enterprises that rely on the Internet for business, lightning strikes will not only cause hardware losses, business Suspension or contact inconvenience caused by the network, resulting in service interruption, it is impossible to estimate. Many network management systems actually have a good concept for lightning protection. However, most enterprise managers are not aware of this issue and think it is unnecessary to take preventive measures. In fact, in areas where lightning strikes often occur, for example, most provinces in South China and East China, whether in urban or rural areas, even if the routers are placed indoors, the chances of lightning strikes are quite high. In addition, many cases of lightning strikes are often accompanied by damage to ADSL cats, switches, or other devices. Therefore, it is necessary to spend hundreds of dollars to prevent them.

A simple example:The optical fiber in the network is generally not afraid of lightning strikes, but the metal shielding layer is not grounded, the power supply of the server room is grounded, but the switch power supply of each building is not grounded, and there is no power lightning protection device installed, no network Referer is connected to the vswitch's entrances and exits. The Overvoltage Caused by twisted pair wires during lightning strikes can easily damage the device.

The first threat to users is the power supply line, and the second is the ADSL Broadband line. Lightning strikes will, on the one hand, lead to induced current, resulting in powerful electric pulse and surge in the power supply, this directly results in damage to the routing device. In addition, twisted pair wires also generate strong induced current, and even directly encounter lightning strikes, which directly leads to damage to the LAN interface of the router or even the router.

Damage to routers by lightning

Lightning enters the LAN or wide area network, and the powerful energy is exploding in the first electronic component that receives energy. We can see a piece of burnt black, and all the related small components are burnt black, this is generally due to high energy and direct lightning attacks.

If the energy is small, the components may be damaged, and the components may not be damaged. Therefore, it can be seen that some small components are burnt away.

I don't know if there is any problem. Because the internal lines of electronic components are very fine, although the external network seems to be only slightly burnt, the internal lines are often damaged. What's even more terrible is that apart from the focus of components, some components may not be completely visible on the outside, but the internal lines are close to destruction.

Overview of router lightning protection measures

As mentioned above, the first threat to routers is the power supply line and the second is the ADSL Broadband line. Based on these two points, we have taken effective lightning protection measures.

1. Power Supply lightning protection hardware:

Installing a power record-proof device in a house is necessary not only to prevent the router from being damaged by lightning, but also to protect other household appliances. If it is a bungalow, be sure to install a lightning rod, which can effectively prevent lightning strikes. If it is a building, check whether the lightning rod can work normally. At the same time, check whether the outdoor power supply line is exposed and whether the joint insulation is good.

A very important part of power supply lightning protection is grounding. At present, most computer users do not pay much attention to grounding. Good grounding can guide the voltage generated by static electricity and lightning to protect the safety of computer equipment. Many computer power plug are three-way grounding socket, but the ground is usually empty, just a placement. Therefore, it is recommended that the computer user be grounded separately and select a good grounding for the three-phase plug, which can greatly reduce the damage caused by lightning strikes on the computer, ADSL Broadband equipment, routers, and so on.

2. deploy broadband lightning protection measures:

At present, there are already some broadband Modem products available for lightning protection on the market. Users can purchase lightning protection products to achieve the purpose of lightning protection. Due to the mixed use of lightning protection products on the market, it is not ruled out that some products under the banner of lightning protection but without lightning protection functions, users must pay attention to the purchase.

In addition to the ADSL Broadband Modem product for lightning protection, you can purchase a telephone lightning protection device. Install the telephone Referer in front of the ADSL signal splitter. When purchasing a telephone Referer, you must go to a regular store to purchase it, and save the invoice. Once the quality is found to be too high, you can seek compensation from the seller.

Analysis and Handling of lightning strikes:

1. Lightning strikes from telephone lines

This is the most common phenomenon, accounting for about 74% of the overall lightning strikes. In this case, the lightning strikes come in from the ADSL telephone line, first to the ADSL cat, and then to the WAN port of the router, which eventually causes the components in the router to be damaged. Because the telephone lines are pulled from the outside, most of them are suspended in the air, so it is easy to become the target of lightning strikes, so the most happen. Lightning's high-voltage energy leads the line in, damaging different devices until the energy is grounded or consumed.

Users should first prevent such lightning strikes. First, they should check the nearby telephone lines, whether they are in a relatively high position or have prominent objects. This will easily become the target of lightning strikes, in this case, the telephone bureau should be promptly requested for repair and improvement. In addition, lightning protection also needs to be implemented for lines. Purchase lightning protection terminals in the location of the telephone line access to protect all internal network equipment. Lightning Protection terminals can effectively offset lightning energy. Even if they cannot be completely offset, they can only hurt ADSL cats and cannot damage other devices.

2. Lightning strikes from LAN lines

This case rarely happens, accounting for about 21% of the overall lightning strikes. This occurs when a LAN line is used in. It is very likely that the switch is broken first, then the LAN port of the router is hit, and then the components inside the router are broken. This usually occurs when a residential area or a home user is exposed across a building or floor line. In this case, the network line may be suspended and directly become the target of a lightning strike, however, as it is close to metal wiring, such as iron pipes and railings, it can generate an induction, which can also press high voltage to the LAN line.

Users exposed to LAN lines should also prevent such lightning strikes. First of all, we should avoid leaving the line empty, so it is easy to become a lightning strike target. One way is to convert it into a wireless network bridge, or use an insulating pipe to strip the line from the ground or extend the wall. Second, it is best to avoid a large area or metal line in the vicinity of the line, in order to prevent the occurrence of Power jump, innocent disaster.

Some LAN lightning strikes occur because the wires are struck by lightning, and the cables are connected to the leased line in the cabling pipeline. This requires the grounding of the leased line. To connect the lightning protection terminal, you must connect a line under the switch to protect the switch and router. If the building is old or has poor grounding, you must connect all or only protect the routers and connect them between the vswitches and vrouters.

3. Lightning strikes on the power line

This situation is rare. The probability of lightning strikes is only single digits, about 5%. This is because normal buildings are grounded and lightning strikes can be taken away. In this case, lightning enters the power outlet and breaks down some of the power lines of the switch. The damage caused by this kind of damage is small and will be introduced later. Because lightning strikes must come in from the router line, there is a small chance. Frequent incoming situation of sensor local network lines. However, there are also cases of mutual sensing between power cords. This is usually the case when there is no lightning rod setting for old buildings.

This situation, of course, is to prevent from the power supply line. One practice is to observe the Overall Building to Improve the grounding situation. In addition, the plug-in is used to prevent lightning strikes, or the ground of the plug-in is prepared to effectively eliminate energy. After that, the lightning terminal of the power line is considered to be installed. The Lightning terminal of the power supply is more expensive.

Lightning Protection is like insurance. If you do it first, you can avoid great losses. Users in business sites should consider it. Users should observe the layout of network lines and decide whether to take relevant measures.

1. How to Protect routers against lightning
2. Early Prevention in the thunderstorm season