There is MAC conflict against terminal for TP3106 product

Publication Date:  2013-11-25 Views:  155 Downloads:  0
Issue Description
Some site have to use LAN2 to capture packets for diagnosing. Meanwhile LAN2 is used for the inner-communication.
Alarm Information
we renew the site after we capture the packets, we find there is a prompt that terminal conflicts with MAC xx.
Handling Process
Firstly sharing the handling procedure, we at the first time check the MAC addr of this terminal and find that the error MAC is the same as the terminal. It means that the terminal conflicts with itself. We check the settings and the MAC addr. But in vain. And we didn`t find this error before we diagnose. We just enter 1 command and capture the packets. But they don`t enter the command to stop the capturing. Because it`s the same MAC between lan1 and if we enable the capture-mode for lan2. If we don`t stop it. it will result to this issue.
Root Cause
Usually , it will be the these probablities for this issue.
1. This IP has already exited in this network,
We can modify the IP of the computer into the relative . after you modified successfully, you can connect the same cable connecting the PC before. You can ping it. if you can reach it. it means this IP exits. If you can`t reach it. you can go 2 or 3.
How to check the MAC of the terminal. Telnet the terminal. Enter the command:Main macaddr

2. Network loopback
There are many ways to check whether it exists network loopback. Such as the monitor port, it can detect the port. Here it`s not the important point.
3. Set the IP.addr into 192.168.x.x.(the newest terminal has been modified into 202.168.x.x)
The inner communication IP.addr is the same lP group for the old terminals. If we the IP.addr we designed before is the same. It will have this error. So we suggest the customer redesign the IP.addr.
4. others。
Such as this case is a strange situation. Such as the abnormal service-operation. Strange to our facility etc.
Enter the command to close the capture the packet. And renew the situation. This case is solved. We suggest do more summary for the daily same issue.