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# Verify that frames with an unknown destination MAC address, multicast address, or broadcast address
are discarded. (Details not shown.)
Troubleshooting port security
Cannot set the port security mode
Symptom
Cannot set the port security mode for a port.
Analysis
For a port operating in a port security mode other than noRestrictions, you cannot change the port
security mode by using the port-security port-mode command.
Solution
To resolve the problem:
1. Set the port security mode to noRestrictions.
[Device-Ten-GigabitEthernet1/0/1] undo port-security port-mode
2. Set a new port security mode for the port, for example, autoLearn.
[Device-Ten-GigabitEthernet1/0/1] port-security port-mode autolearn
3. If the problem persists, contact HP Support.
Cannot configure secure MAC addresses
Symptom
Cannot configure secure MAC addresses.
Analysis
No secure MAC address can be configured on a port operating in a port security mode other than
autoLearn.
Solution
To resolve the problem:
1. Set the port security mode to autoLearn.
[Device-Ten-GigabitEthernet1/0/1] undo port-security port-mode
[Device-Ten-GigabitEthernet1/0/1] port-security max-mac-count 64
[Device-Ten-GigabitEthernet1/0/1] port-security port-mode autolearn
[Device-Ten-GigabitEthernet1/0/1] port-security mac-address security 1-1-2 vlan 1
2. If the problem persists, contact HP Support.
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