Hi all
I have big problem in my network “loop”
my users use router"TP-LINK" and when someone connect the internet cable in wrong port ,
its case loop in my network and stop all my Ap and server,
how i can prevent this its killing me 
Please answer what i can do
Read and learn about spanning tree, and implement it in your network.
I try it but nothing happen:(
Then you didn’t do it right. If you had done it right spanning tree would have prevented loops from forming. That’s what spanning tree does.
That said, you can also convert from a bridged network to a routed network.
Those are literally your only two options. Going to a routed network is going to be more work, but is also cleaner. Spanning tree will also solve the immediate issue.
It’s impossible to be more specific without knowing your network inside out. If you can’t do this yourself you should look at hiring a consultant. This affects your entire network, this is not something trivially solved in a forum post. If bridging loops take down your entire network then your entire network is - sorry to say - very poorly designed and needs to be looked at from the ground up.
okay thanks