SECE/4/UCSUPPRESS

Message

SECE/4/UCSUPPRESS: MAC address flapping started on port. The rate of unknown unicast packets was limited to 50% of the port bandwidth. (Interface=[STRING])

Description

The device detected MAC address flapping on an interface, and suppressed unknown unicast traffic to 50% of the interface rate.

Parameters

Parameter Name	Parameter Meaning
Interface	Indicates the name of an interface.

Possible Causes

When storm control and traffic suppression are not configured, the switch suppressed unknown unicast traffic on an interface when detecting MAC address flapping on this interface.

Procedure

Run the snmp-agent trap enable feature-name l2ifppi command to enable the alarm function for MAC address flapping, including hwmflpbdalarm for MAC address flapping in a BD, hwmflpvlanalarm for MAC address flapping in a VLAN and hwmflpvsialarm for MAC address flapping in a VSI. Check whether these alarms are generated.
- If so, go to step 2.
- If not, go to step 3.
Based on the generated alarms, take measures by referring to L2IFPPI_1.3.6.1.4.1.2011.5.25.160.3.7 hwMflpVlanAlarm, L2IFPPI_1.3.6.1.4.1.2011.5.25.160.3.17 hwMflpBdAlarm or L2IFPPI_1.3.6.1.4.1.2011.5.25.160.3.8 hwMflpVsiAlarm. Then, check whether the recovery log SECE/4/UCSUPPRESSRESUME is recorded.
- If so, no further action is required.
- If not, go to step 4.
Check whether the recovery log SECE/4/UCSUPPRESSRESUME is recorded.
- If so, no further action is required.
- If not, go to step 4.
Contact technical support personnel. You can collect diagnostic information using the display diagnostic-information command.