Common fault Repair for routers

Router Common troubleshooting :




The application of
broadband router in enterprise network is quite extensive, in the course of the operation of the failure is inevitable, although the phenomenon of a variety of failures, causes of failure are not the same, but in general can be divided into hardware failures and software failures, specifically, some network connectivity problems, Configuration file options issues and network protocol issues.





due to the failure of the router caused the enterprise network interruption, this will not only bring a lot of inconvenience to the enterprise, it may also cause a certain loss, so in a timely manner to solve the enterprise broadband router fault is very necessary. For some common fault problems, as long as the enterprise network maintenance personnel carefully analyzed, it is not difficult to solve. The following on the enterprise broadband router common fault problem machine solution from the hardware failure and software failure in two aspects, I hope to be able to the enterprise users in the router trouble solving problems to help.





One, the hardware fault problem





here refers to the hardware, that is, the enterprise broadband router itself, that occurs in the router itself fault problems. The problem of hardware fault is mainly embodied in the following aspects.





1. Physical Failure





physical failure refers to the router device or connection between the router and other devices of the line damage, plug loose, and the line is severely electromagnetic interference, these problems will cause the router does not work properly. For the solution of the physical failure, the user can check the connection of the line from the router device or the network Center, confirm the fault point and then troubleshoot.





physical failure problems often occur in the following two situations.





system can not be normal power





This fault occurs when the power switch on the router is turned on, the power supply light on the front panel of the router is not lit, and the fan does not rotate. In this case, the first thing to check is the power system, to see whether the power supply socket current, voltage is normal. If the power supply is normal, it is necessary to check whether the power cord is damaged, there is no loose, and then make the corresponding correction, the power cord damaged words on the replacement, loose the words will be inserted again.





If the problem has not been solved, the problem can be blamed on the router's power supply. Check carefully, see if the router power insurance is intact, if burned then the problem should be resolved after replacement. After this step, if the problem has not been resolved, it will only be able to send the enterprise broadband router to a dedicated place to repair.





Router Parts damage problem





is a common type of fault problem in hardware. The part where the problem occurs is usually the interface card. This type of failure is often manifested in two cases: in one case, when the problematic part is plugged into the router, the rest of the system can work correctly, but it does not correctly identify the part that is plugged in, mostly because the part itself is faulty.





another situation is that the inserted parts can be properly identified, but after the correct configuration, the interface will not work properly, this situation is often due to other physical problems. The solution to this type of failure problem is to identify the problem by first confirming which of these is the case, by replacing the suspect part with the same model.





2. Fault
of enterprise broadband router system software




System software Damage




The problem of
system software is usually caused by the problems of the router itself, which is closely related to the hardware. The performance of this phenomenon is diverse, but the general problem is that as long as the problem of the software part of the rewrite will be able to solve the problem.





cannot perform system software upgrades





If a user upgrades the system software and does not have the capability to complete the upgrade at all, it is mostly because the content of the software being upgraded exceeds the capacity of the NVRAM (an electrically erasable memory, usually used to store system software), and the NVRAM should be upgraded. This will not only expand the capacity of the NVRAM, you can also update the data inside.





fault
caused by human factors




The human factor here refers to the phenomenon of network connection error caused by the negligence or operation error of the personnel in the enterprise. This situation is manifested as the line is not connected, the network can not establish the phenomenon of connection. In this case, the first step is to detect the transmission line and check if the correct cable and port are used.





the correct connection should be using a network cable to connect the router's WAN port with the ADSL modem, telephone line even ADSL modem's "lines" mouth. The connection between the ADSL modem and the broadband router should use a straight line. The next step is to check whether the link lights in the router LAN display a normal signal to see if the router and LAN are online properly.





Second, the software fault problem





when the hardware failure factor of the enterprise broadband router is eliminated, it is important to check the fault of the router software.





1. Insufficient performance of router devices





CPU utilization and system memory too low will directly affect the quality of the network services provided by routers. In general, the Enterprise network Management system has a special management process to continuously detect the key data routers, and timely alarm. Solve this kind of trouble, only need the enterprise related personnel to upgrade the router equipment, enlarge the memory and so on.





2. Incorrect network settings





This problem is the most common, that is, because the improper setting of the router caused the network is not functioning properly, such as the line at both ends of the router parameters mismatch or parameter errors, or the route mask settings error.　　 Find the router default administrative address by looking at the manual, for example, the router default IP address is 168.76.2.1, the mask is 255.255.255.0, and then the computer is connected to the enterprise's LAN port on the router, and then the correct IP address is set up for the computer within the enterprise.




There are two ways to set up
IP addresses, respectively, by manually setting IP addresses and by using the router's built-in DHCP server to automatically set up IP addresses. Because of the number of computers inside the enterprise, the IP address of the computer to set up a lot of trouble, so the general will choose the latter setting.





3. Some functions of the enterprise broadband router cannot be realized





If the router is configured correctly, some features are still not implemented, perhaps because of the router's system software problems rather than the enterprise broadband router itself, because the router's system software often has many versions, and each version supports different features. So it is likely that the current version of the software does not support this feature and cause some of the loss of functionality, if so, the corresponding software upgrades on the line.





This problem, for enterprise users, the impact is relatively large, but also easier to ignore, because the enterprise users of the network use more frequently, the required function is relatively more, if the lack of one of the one or two commonly used functions are more troublesome.





4. Line interruption, easy to drop, restart the router and then connect to the





causes this kind of fault the reason is more complex, generally is causes by the following several reasons.





1) may be caused by too many DHCP servers in the network to cause IP address confusion. Then you need to shut down all the DHCP servers in your network, and then adjust the IP address by manually specifying the IP address or retaining only one DHCP server.





2 for enterprise users who use ADSL access, this may occur because the router being used is incompatible with the ISP's local-side device. The solution to such problems can only be changed to other types of routers or ADSL Modem.





3) may be the enterprise network by viruses (such as worms, Trojan virus, etc.) intrusion, the solution is of course, the use of the corresponding anti-virus software antivirus.





4) also may be due to the high load of the enterprise router, the performance of the router CPU temperature is too high, CPU utilization is too high, as well as too little memory surplus, and so on, because the use of routers in the enterprise can be said to be a long time uninterrupted, such problems are and ordinary, The solution to this type of failure is to provide a better thermal environment for the corporate router and, if necessary, to replace a better performing router.