Experts solve the LAN IP address conflict has a trick

For network administrators or users, the occurrence of "IP address conflict" is unwelcome, because in a network, each host (strictly speaking, network interface) All should have a unique IP address. If two or more hosts use the same IP address, these host screens with the same IP address will pop up a dialog box to report IP address conflicts, which will result in these machines using the same IP. The network cannot be accessed normally. What should I do with IP address conflicts? How to resolve LAN IP address conflicts?
If two users use the same IP address in the same LAN, or a user has obtained an IP address through DHCP, and then Some other users have set the same IP address by manual allocation, which will cause IP address conflicts and will make one of the users unable to use the network normally.
So, how should we avoid IP address conflicts? We can analyze the following aspects:
The cause of IP address conflict:
1, many users do not know "IP address" ”, "Subnet mask", “default gateway” and other parameters, sometimes the user is not the information of the above parameters obtained from the administrator, or the user does not intend to modify the information caused by; Br> 2, sometimes the administrator or the user according to the parameters provided by the administrator, the parameter input error due to mistakes will also cause the situation;
3, the most frequently occurs during the maintenance and commissioning of the client, maintenance The person uses the temporary IP address application;
4, does not exclude someone stealing the IP address of another person, causing IP address conflict.
LAN IP address conflict resolution:
Scenario 1: Check one by one.
This is the most primitive method, that is, when an IP address conflict occurs, in the LAN, next to each computer to view, find the computer with the conflict and modify the IP address. However, this is time consuming and is not suitable for use in large LANs. It is only suitable for use in a small network environment.
Scenario 2: MAC address binding.
1, check the MAC of the local computer and bind: you can detect the MAC address of the network card by running Winipcfg.exe or Ipconfig.exe on the local computer system. The details are as follows: In the Win9X system, click “Start”——“Run”, enter “Winipcfg” in the text box and press Enter to pop up the “IP Configuration” window. In the drop-down list, select “PCI Fast Ethernet Adapeter”, the text displayed in the “Adapter Address” column is the MAC address of the network card; run at the DOS prompt of the WinNT system with “all”; The ipconfig command of the parameter, ie ipconfig/all, also displays the MAC address of the NIC.