ALM-303046965 Loop exist in vlan

Description

L2IFPPI/4/MFLPVLANALARM:OID [OID] Loop exist in vlan [INTEGER], for [OCTET].

MAC address flapping occurs.

Attribute

Parameters

Impact on the System

Traffic cannot be received normally.

Possible Causes

Cause 1: The interfaces where loops occur are added to the same VLAN.

Cause 2: Cables are connected incorrectly.

Cause 3: Loop detection and STP are enabled to remove loops on the network.

Procedure

1. Check that cables are connected correctly. Then check whether the alarm is still reported.
   • If yes, go to step 2.
   • If not, go to step 6.

2. Check whether the two interfaces that learn the same MAC address can be added to different VLANs according to the networking.
   • If yes, go to step 3.
   • If not, go to step 4.

3. Modify the configuration and add the two interfaces that learn the same MAC address to different VLANs. Then check whether the alarm is still reported.
   • If yes, go to step 4.
   • If not, go to step 6.

4. Disable loop detection and enable STP. Then check whether the alarm is still reported.
   • If yes, go to step 5.
   • If not, go to step 6.

5. Contact technical support personnel.
6. End.

Related Information

None