Troubleshooting steps
Check port security settings, verify MAC addresses, clear port security violations
Network Equipment Codes
Port blocked
Port has been blocked
Details
A switch port has been blocked due to security policy or error condition.
Error typeerror
MeaningPort blocked
Typical causesSecurity policy violation, port security, error condition
SolutionsCheck port security settings, verify MAC addresses, clear port security violations
Severitymedium
Catalog references
Where this appears
CiscoSYS-4-PORT_BLOCKED
Utilities
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FAQ
Common questions
How do I unblock a port?
Check port security configuration and clear any violations. Port may auto-recover after timeout.
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Discussion & Experiences
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