Disable Unmanaged Switch on Cisco Siwtch

[FN-GM]

Hi,

 

Is it possible on a Cisco switch to disable plugging in unmanaged switches please?

 

Thanks

[plexer]

How would a switch know that something being plugged in was an unmanaged switch though?

 

Maybe port authentication would do what you want?

 

Ben

[FN-GM]

How would a switch know that something being plugged in was an unmanaged switch though?

 

It would see multiple device mac addresses on 1 port.

[spc-rocket]

It would see multiple device mac addresses on 1 port.

 

In which you may want to limit the no. of mac addresses per port i.e. only allow a max of two. Configure the violation to shutdown the port etc maybe.

[FN-GM]

apparently enabling spanning-tree BPDUGuard enable on the port will solve it.

 

Thanks

[plexer]

Excellent thanks for the update. You don't use voip phones with integrated switches do you?

 

Ben

[FN-GM]

Yep we use VOIP phones.

[plexer]

switchport port-security maximum 2 ! or whatever number is appropriate

switchport port-security violation

shutdown switchport port-security

 

So a voip phone with a pc connected would be seen as 2 devices?

 

Ben

[FN-GM]

None of our VOIP phone have PC's connected as well. They all have dedicated ports.

 

So those commands will make it so they only can allow 2 devices connect to that port?

 

Thanks