I am testing L2 port security when attaching Corporate swith to an external switch.
1. I can disable STP on the port so the external switch does not affect my network.
2. Add BPDU Guard to it in case it starts STP.
3. change VTP default domain and password.
4. Disable CDP
I will like to know if there is any further measures that I can take to secure the port to an external Switch. I will like to disable VTP on this port if possible.