Cannot Change Port Security Mode When A User Is Online - 3Com 4210G Series Configuration Manual

Solution
Set the port security mode to noRestrictions first.
[Switch-GigabitEthernet1/0/1] undo port-security port-mode
[Switch-GigabitEthernet1/0/1] port-security port-mode autolearn
Cannot Configure Secure MAC Addresses
Symptom
Cannot configure secure MAC addresses.
[Switch-GigabitEthernet1/0/1] port-security mac-address security 1-1-2 vlan 1
Error:Can not operate security MAC address for current port mode is not autoLearn!
Analysis
No secure MAC address can be configured on a port operating in a port security mode other than
autoLearn.
Solution
Set the port security mode to autoLearn.
[Switch-GigabitEthernet1/0/1] undo port-security port-mode
[Switch-GigabitEthernet1/0/1] port-security max-mac-count 64
[Switch-GigabitEthernet1/0/1] port-security port-mode autolearn
[Switch-GigabitEthernet1/0/1] port-security mac-address security 1-1-2 vlan 1

Cannot Change Port Security Mode When a User Is Online

Symptom
Port security mode cannot be changed when an 802.1X-authenticated or MAC authenticated user is
online.
[Switch-GigabitEthernet1/0/1] undo port-security port-mode
Error:Cannot configure port-security for there is 802.1X user(s) on line on port
GigabitEthernet1/0/1.
Analysis
Changing port security mode is not allowed when an 802.1X-authenticated or MAC authenticated user
is online.
Solution
Use the cut command to forcibly disconnect the user from the port before changing the port security
mode.
[Switch-GigabitEthernet1/0/1] quit
[Switch] cut connection interface gigabitethernet 1/0/1
[Switch] interface gigabitethernet 1/0/1
[Switch-GigabitEthernet1/0/1] undo port-security port-mode
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