Troubleshoot home network shared hardware issues

After a fuss, and finally the home network set up installed, but found that the network can not share, the mood immediately fell to the bottom. What is the cause of the network can not be shared properly? For many reasons, there are software reasons, as well as problems caused by hardware. And in order to make it easier for everyone to solve the problem of network can not be shared, let's talk about the problem of network sharing caused by hardware.

First, the problem caused by the network card

Due to the network card hardware cause of the Internet can not be shared a lot of reasons, but we summed up, the main has the following:

Network card damage

The quality of their own work, static electricity (installation of network cards and other equipment before the best to touch the other metal body, such as chassis, to eliminate static electricity), lightning (in the case of lightning, as far as possible to dial down the network cable, suspend the use), improper installation is caused by the network card hardware After the NIC is properly installed in the corresponding slot on the computer, Windows should be able to automatically find new hardware and install the drive smoothly. If not, it means that the NIC is damaged or not installed.

Of course, it is not Windows can automatically find new hardware and can successfully install the driver on behalf of the network card is good, in fact, many appearance without any damage to the network card, "Device Manager" in the absence of any errors in the network card does not work properly. The cause of such problems may be the interface of the network card is damaged, but also may be the NIC PCB board some of the components caused by problems.

In this respect, we can judge from the following points:

① can be judged by the ping command. Enter "Ping 127.0.0.1-t" or "Ping 192.168.0.3 (native NIC IP address)-T" in the start → run field, if Ping, indicates that the NIC is working properly, or if the NIC fails or there is a problem with the local TCP/IP configuration. If you do not have a normal installation drive (for PCMCIA or USB interface card, it is best to install the network card driver or configuration program and then insert the network card) or in the slot is not plugged in, loose and so on, can be checked individually. If all of these reasons are excluded, the NIC is corrupted.

The light on the ② network card is also an important evidence to determine whether the NIC is working properly. The typical LED indicator on the NIC has link/act, full, power, etc. The link/act indicates the connection activity state, full indicates whether Full-duplex, and power or PWR is the supply led. PWR or act light green indicates normal power supply, if not bright, it indicates a problem with Nic or host (NIC or LED is damaged or not installed). Link Light green indicates that the wireless signal connection is normal, if not bright, the network card itself may be installed or the network cable connection problems.

Other factors

Of course, the network card does not work properly, but also very likely host reasons, such as host slot problems. This can be replaced by a slot to try, or change a computer to see.

Second, can focus on checking the network card slot whether there is a problem, such as pin damage or whether there is dirt in the slot/dust, etc., can be blown or brushed hair.

In addition, the key to check the card location (gold finger) is enough dirty, oily or halogenated, whether there is physical damage (such as scratches), for the obvious dirty, shiny or halogenated card parts (Goldfinger) can be used eraser or toilet paper, it repeatedly clean and clean, and then insert slots to see.

In addition, many configuration of the same LAN computer will be cloned to install the system, if the two computers on the network card slot location is inconsistent, it may also cause the network card can not use the illusion, this simply remove the network card driver, let Windows reinstall a driver can be.

Second, the problem caused by network cable

Network cable caused by the failure of the normal sharing of hardware problems are also common, and the cause of such problems are mainly the production of network cable and Crystal head problem.

As you know, twisted pair is a data transmission line composed of many pairs of wires in an insulating coat, with RJ45 head (Crystal Head) installed at both ends, which is used to connect the network card and switch equipment. If the crystal head is suppressed improperly, such as twisted thread does not plug into the top of the crystal head or suppress, twisted-pair line is not in accordance with the standard foot-level suppression, cable production in order to arrange errors or non-standard, cable connection should be used to cross the line but the use of direct connection and so on will cause the network impassability.

Because many network adapters and switches are supporting automatic line sequence crossover (Auto-mdix) function, many users of twisted-pair production more and more, even many users do not press 586A or 586B line arbitrary suppression straight or even cross twisted pair, this will certainly bring hidden dangers for network sharing.

We recommend that, not because of the automatic line sequence crossover function change, ensure that the switch uplink port to connect the switch normal ports and switch normal port connection network card in the occasion of the use of straight lines, the switch normal port to connect the switch normal port and network card connected to the occasion using the intersection line. Whether in the use of direct or cross twisted pairs of occasions should be strictly in accordance with the 586A (green and white, green, orange, blue, Lambai, Orange, brown, Brown) or 586B (orange white, orange, green, white, blue, Lambai, green, brown, Brown) line order to do. If your network is not working, you might want to do a focus check.

To determine whether there is a problem with the network cable, the user can be qualified to check the net cable tester. Instead, users who do not have a dedicated line-checking tool can check the replacement method first of all, ping LAN to the other computer's IP address, ping is not the general rule that the network does not work, can be used to replace the use of stranded twisted-pair cable, if you can ping, it indicates that the original network cable has problems, can focus on inspection. If still impassability, it indicates that the network card and other hardware problems, can be the right remedy.

In addition, the network caused by Internet cable is not able to share the main reason there are the following points: internal strand fracture due to external causes; the use of inferior crystal head, Crystal Head shrapnel elasticity is insufficient, resulting in poor contact; The gold-plated layer is too thin, the network cable many times after plugging, it may grind off oxidation, resulting in poor contact The thread is not plugged in place or loose, and can be suppressed again with clamp clamp.