Port Link-Flap Detection
This feature detects excessive link flapping (link going up and down rapidly) on a physical port and can take the following actions:
- Disables port—After the port is disabled due to excessive link flapping, the port either stays down for the configured disable time value or can be re-enabled manually.
- Reports issue to Syslog—Adds an entry in the log for a link down event (see Link-Flap Detection Syslog Messages).
- Generates SNMP trap—SNMP trap generated for a link down event (see SNMP Traps).
You can configure the interval, threshold (maximum number of link down events), and disable time, and which of the preceding actions to take on a per port basis.