Ruijie is always disconnected when the reason 50

First: there is a problem with your network cable, I have maintained the campus network for a period of time, and a large part of the Ruijie problem that I have solved for others is due to the problem of my own network cable, and the network cable is problematic here, not that your network cable can not be linked, in many cases, the quality of your network cable is not good, or the network cable sequence or the contact of the crystal head is not good. In this case, sometimes you can access the Internet, and sometimes you can't access the Internet, and you need to reseat the network cable, or repair the local connection to continue surfing the Internet.

In this case, you can only change the network cable.

Second: there is a problem with your Ruijie software, if you are disconnected from the network, Ruijie prompts you, Ruijie and the system have conflicts, etc., then your system has installed a program that conflicts with Ruijie, such as many camera drivers will cause Ruijie to report errors and conflicts. In this case, you can only go to the latest version of Ruijie to solve the compatibility problem, and if you are a Vista system, please use the Vista dedicated Ruijie version.

Some schools have their own and Ruijie company's specially formulated Ruijie version, and you need to use a specific version to access the Internet normally.

Third: The school network is unstable, which cannot be solved, so report it to the network administrator. Do you see that other people are in the same situation as you? If someone else is normal, it's your problem.

Fourth: If there are many people in your dormitory who are using the Internet and use a small switch, then do you see if it is normal for others in the same dormitory to access the Internet? If they are normal, then your problem is generally a problem with the network cable, or the unlucky point, it is a problem with your network card.

Fifth: Very small details, but can not be ignored, that is, Ruijie's settings should use Ruijie's private multicast to the point, do not use standard multicast, some people's problem is this.

Sixth: Someone is attacking you, this just means that it is possible. However, now schools generally have ARP hard defense, and if your school has bound MAC and IP addresses, this will not happen. However, you'd better install an ARP firewall software.

Seventh: You have the ARP virus, kill yourself.

There are two problems with disconnection, one is the loop of the network, but the background management of Ruijie. Your business is down for no reason, you can find a Ruijie engineer stationed in your school to deal with this. Or information: Ruijie customer service of colleges and universities across the country ** for help.

That's for sure, after the network is disconnected, you can't access these software and resources, the remote server must not be able to get the data, then you need to configure the port of the switch or router, open the port, then you need to log in to the IP of these devices and the remote login account password, just go in and open the port, so it is generally difficult to do, unless you are a master of network hacking, you can crack it.

Steps to resolve the disconnection:

1. Plug the external network cable into the uplink port of the hub, and other machines (including the host) are plugged into the other ports of the hub at the same time.

2. This is very important, the machine must be XP system, and each machine must turn on the Windows firewall (remember, it must, otherwise other machines can not open web pages, only QQ).

3. The host dials up, and the test is normal.

4. Click Start on the host - > run, enter cmd, open the command line, it is a black window (some people also call msdos, but this name is wrong) use the ipconfig all command to view the MAC address of the host network card, for example (this is my machine, if someone can see which school I am, don't tell others):

host name . harbinaomo

primary dns suffix .

node type . unknown

ip routing enabled. .no

wins proxy enabled. .no

dns suffix search list. .

Ethernet Adapter Local Connection:

connection-specific dns suffix .

description .

realtek rtl8139 family pci fast ethe

rnet nic

physical address. .01-e0-4e-fe-d1-2d

dhcp enabled. .yes

autoconfiguration enabled . yes

ip address. .

subnet mask .

default gateway .

dhcp server .

dns servers .

lease obtained. .May 29, 2007 0:53:50

lease expires .June 28th, 2007 0:53:50

Where: physical address .

:00-e0-4c-fe-d1-3e, which is a six-group hexadecimal number, is the MAC address of the host, write it down.

5. Look up a software on the Internet to change the MAC address of the machine, such as K-Mac (this is what I use). Then install it on other machines, and change the MAC address of other machines to be the same as the host computer.

It's OK to go through the above 5 steps, fourth, disadvantages:

Everything will have shortcomings.,The disadvantage of cracking this way is that the LAN is sacrificed.,If you need to connect to CS or Warcraft,You need to disconnect the network.,Everyone can change their MAC address back.。

There is also the fact that the main machine must be turned on so that other machines can be on.

For example, some networks often drop connections, get stuck, and slow problems, and later find that they are related to several factors.

1. The external network bandwidth is insufficient ......

3. Some people use P2P terminators, network law enforcement officers, Jusheng network managers and other software to limit the speed of others.

Performing an attack results in a disconnection.

5. Flood packet attacks are generated on the intranet, and garbage packets block the entire network.

6. Someone changes the IP address in the intranet and causes conflicts.

7. Some network cables or crystal heads have poor contact.

The probability of instability of a hardware router is very small, the probability of network cable connection problems is also small, and the possibility of insufficient bandwidth is not large. 80% of intranet disconnections are caused by intranet attacks.

A company with dozens of computers must be connected to the switch, many ARP attacks do not go through the router, directly through the switch to other computers, there are some attacks on the intranet, but there are almost no hardware routers can solve the problem. Intranet attack routers, firewalls, and antivirus software like this will not work. Therefore, many disconnection problems are related to some networks such as routers and firewalls.

According to statistics, more than 80% of network security threats come to intranet attacks, and there are currently ...... ARP attacks, skulls, DDoS, and oversized ping packets in intranetsA series of intranet attacks can cause intranet disconnection, and even attacks like ARP are difficult to detect, and antivirus software can't solve them, and they can't be **. This is also the main reason why the intranet disconnection cannot be solved after the system is reinstalled.

At present, the most effective and thorough solution is the immune wall technology, through which the immune network solution is deployed. Immunity network solution, you don't need to make major changes to your network, you can use the immune wall to set the policy, do not install the driver and do not let the source delay the Internet, and intercept it after installation. It can intercept the virus attack sent by each computer directly from the network card, restrict the upload and ** from the network card, the size of the packet, the number of connections, and carry out unified management, and the management is more thorough, and there is only one network administrator, and the Internet access status of the entire intranet computer can also be monitored, and the abnormal situation can be accurately located and alarmed, and the symptoms and root causes can be cured.

You have an unstable network, there are several possibilities:1It's a small chance that you're having a problem with your physical connection.

2.Insufficient bandwidth for your current web application and need to increase the bandwidth.

3.Someone uses BT software to maliciously grab bandwidth, and you can't use the network normally. Or someone uses some network management speed limiting software to restrict the following machines.

4.Viruses in the LAN computer keep sending spam to the network, blocking your normal data through.

The above points are not completely summarized by me, but it is more difficult to really check the starting style. There is currently a router on the market called Immunity Wall, which seems to solve several of the problems I listed.

Ruijie. The authentication IP is noisy, that is, it is an intranet before authentication.

Address, after authentication, it becomes a public network address, when you connect to Ruijie, the computer can't release the old IP to get a new IP, it will be like this, in short, it is still a network card that does not work properly.

There are many workarounds, but the easier one is:

1.Open the --run --cmd command.

When an exclamation mark appears after connecting Ruijie, output ipconfig release to release the IP, and then output ipconfig renew to re-upgrade the limb and destroy the new one.

2.Open the local connection in the lower right corner,Support,Repair,Of course, when the network card is not working properly, this may be the card owner。

3.Update the network card driver to try,Although it is said that the network card is not working properly,But I only know when I test that piece,If you use the driver wizard。

Updating the network card driver doesn't work.,The best way you want to solve it is to reinstall.,But it's not a big problem.,Unless you add other circumstances.,There's no need to reinstall.。

Let's uninstall and reinstall it.,Remember that the package capture tool is also uninstalled at the same time.,It's best to install the latest version.。

Generally, there is a problem with the school's network, and it will be fine after a while. We've had this kind of problem as well.