Wednesday, December 29, 2010

【 Weak current College 】 wireless visits symptoms and to introduce 】


With the wireless Internet technology continues to mature, and wireless network equipment prices continue to go down, the figure of the "wireless LAN" is quietly in our life and work. Compared to a normal LAN visits operation, easier wireless visits some inexplicable failures experienced interference, in the face of these failures, many people often feel unable to respond. For this reason, this article is now to some of the frequent visits of the symptom, as well as wireless responses contributed to let friends future wireless visits operation to brainchild!

Visits a fault, every time you cannot access

Xiao Wang and Xiao Zhang in unit offices through wireless LAN share exchange their respective file material, but in the process of mutual access, often have such a strange fault, that is just starting to transfer files to each other, wireless network transmission speed very quickly, but if after a period of time without any access, wireless network has prompted the network connection has been disconnected, you cannot make any file transfer operation. So what has caused this symptom?, how can we make this wireless visits operation becomes brainchild?

In fact, in most cases this phenomenon sometimes and not a network fault, because now the majority of wireless local area network using a wireless router device, this device will often provide the user with a variety of communication connection, however by default most of the wireless router device will use the "on-demand connections" way, when using this approach to work, the wireless LAN in reconnaissance of the data transfer will automatically connect, if after some time there is no data in the network for transmission, then the wireless LAN will think that the current network status line is empty, it will automatically add the current network connection is down, so when we next time try through visits to wireless network, wireless LAN will pop-up connection has been disconnected.

To avoid this phenomenon, we first need to log into the wireless router's configuration interface in the background, and find the relevant connections settings option and the option value is set to "automatically connect, power up and the line is dropped for automatic connection", the last save configuration parameters, and restart your wireless router, I believe that such a device to a wireless local area network does not appear frequently disconnected phenomena.

Of course, if after the above settings, the wireless LAN is still periodically appeared off line phenomenon, then we need to check whether the current wireless LAN suffered network viruses or hacker attacks, such as wireless LAN once subjected to ARP network attacks, it will often appear network periodically cannot access strange phenomena.

At this time, we may wish to open a local workstation network connections list window, right-click the wireless network connection icon, from the shortcut menu, click "Properties" command to open the wireless network connection properties window, select the settings window of the "TCP/IP" settings option and the option for the property interface, try the manual method to replace the IP address of the wireless network connection, if the wireless card updated address, the local workstation is still often dropped phenomenon, then we only use professional hack software to protect your wireless LAN's visits operation.
Second, access visits failure units slow servers

Accounting Xiao Li after work every day, go through wireless LAN network will be the day of the billing information on a specific unit server folder, in order to timely make leadership review. Previous transfer accounts, information to the server, a blink of an eye's work can be done; but a recent unit to adjust the placement of the wireless router, Xiao Li to server upload capacity is almost the size of the previous accounts file each time you need to wait a long time. So why the server transfer Xiao Li files when a sudden drop in speed, we take measures to enable the workstation and units that Xiao-server exchange rate return to normal?

Taking into account previous accounting Xiao Li to the server when transmitting information, while the more normal speed adjusted wireless LAN router device, he didn't feel to the wireless network transmission speed decreased significantly, it shows this symptom is most likely that the wireless router's location changes, resulting in a weak radio signal, of course, also possible that the server in a unit time relatively heavy, thereby causing Xiao Li access server speeds are affected.

For busy servers by units of access speeds down failure, usually is not our normal users to solve, we can do is try to avoid peak server access, and every time to repeatedly access a server and, of course, the best way is to ask the network administrator for your organization to improve the operating performance of the server itself, ensure that the server is able to answer the user's access request.

For the wireless router placement of access drop down, the speed is relatively common and are often ignored by ordinary users. When the wireless router placement is not appropriate, then the wireless station can accept to wireless signal weak, so when it is transmitted over the wireless network speed when files are naturally very slow.

To resolve this symptom, we can move the wireless router is placed in the center of the wireless local area network, while ensuring that the equipment and other wireless workstation cannot interval more cement walls; it is also important to do is try the wireless router is placed in a higher position, the only way to get the wireless station strength better communication signal, then the speed of the server to access the units can be effectively promoted.
Visits fault three, you cannot access the Internet through a local area network

An organization set up a wireless local area network, the unit staff to access directly through a wireless LAN Internet. But there is aDays, the staff of small open their own workstation Mon ready to surf the Web and found that you cannot access the contents of the Internet, see the wireless network connection status, the system prompts to be able to send out information, but cannot receive information. Experience this access failure, how are we to help employees access to correct small Meng Internet content?

First of all check the staff workstations small Meng in physical connection is correct. In this review, we may wish to first open the local workstation's IE browser window and in the address bar enter the wireless router's admin address, click the Enter key to open it in the background after the login screen, then enter the correct password, the administrator account and access to the wireless router's admin interface, the interface Ping local ISP's DNS server address if the ping is functioning properly, it means that the wireless router to the Internet between the line status is open, otherwise we will need to check the wireless router's Internet connection parameters are configured correctly.

Secondly in a wireless local area network-find a regular workstation, and the workstation system interface to switch to the MS-DOS window, and then in the window of the command line to perform string command "Pingaaa.aaa.aaa.aaa" (aaa.aaa.aaa.aaa address for the wireless router's internal interface address is the local network gateway address), if the command can execute successfully, it represents a local LAN network line connection is good, otherwise we would need to check the wireless router configuration and workstation configuration is correct, and also checks whether the lines between them.

If the above several Ping tests are passed, but still cannot access the Internet, we also need to check the General workstation for the Internet parameters are set correctly, such as workstation internal gateway address and DNS address is correct, etc. When the confirmation of these parameters are normal, we then check the wireless router on NAT connection is configured correctly; if only we could not find the router configuration error, might try to check the address of the NAT translation table, of course, this feature requires the support of our wireless router.
Visits fault, was unable to access the wireless router background interface

Recent units of wireless LAN IP address conflicts occur frequently, then go through the extra shipping unit network administrator, LAN carefully checks in addition to a dedicated DHCP server to assign addresses to workstations, the wireless router with DHCP service is also on the "grab" the IP address assigned to a workstation, the workstation's IP address, of course, conflict-prone. In order to remove an IP address conflict failure, network administrator, extra shipping preparation login into the wireless router background interface, it has enabled the DHCP service is temporarily suspended, but who had thought little in their own workstation tries to log on to the wireless router background, how to open its background login interface, this is why?

This causes a lot of different reasons, require the use of different methods for coping with a hardware failure causes more common, such as network cable fault or short circuit, network connection joints loose phenomenon, wireless router itself there is a hardware failure, etc. For hardware faults, we usually just by looking at the wireless router's signal status in the Control Panel, you can determine whether a hardware problem. Of course, if the input voltage of the wireless router is not working properly, or the device's internal temperature is too high, or the device suffered by lightning, but also easy to cause the wireless router background interface cannot access failures.

In the exclude cannot access wireless router background interface phenomena, we first need to check the wireless router control panel data signal status is normal, for example in general the power light is blinking intermittently, it shows the device input voltage normal, if the wireless router control panel of the other lights not working correctly, then we only according to the status of the corresponding signal to conduct targeted troubleshooting.

If you exclude the hardware, wireless router background interface still not able to access, then we might as well on the local workstation check network connection parameters, in particular to check that the IP address of the wireless router's default IP address is on the same subnet, if not, we may wish to give back to the local network adapter is assigned an appropriate IP address, and try to connect the local workstation to the firewall function temporarily mask off, I believe this to be able to solve the unable to access the wireless router background interface failure.

Of course, the above operation if it is invalid, then we may wish to press the wireless router's reset button in the Control Panel, so that all the devices work parameters back to factory settings, it also does not work, then, may wish to reinstall the drivers for the wireless router. Of course, if tried all methods also cannot address the symptom, that we only contact your device manufacturer and check for conflicts between hardware related issues.

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