Cannot set the port security mode
Symptom
Cannot set the port security mode.
[Device-GigabitEthernet1/0/1] port-security port-mode autolearn Error:When we change port-mode, we should first change it to noRestrictions, then change it to the other.
Analysis
For ports operating in a port security mode other than noRestrictions, you cannot change the port security mode directly by using the port-security port-mode command.
Solution
First set the port security mode to noRestrictions.
[Device-GigabitEthernet1/0/1] undo port-security port-mode [Device-GigabitEthernet1/0/1] port-security port-mode autolearn