VMware SD-WAN by VeloCloud Edge reports an "Edge L2 Loop" event

Products

• VMware

Issue/Introduction

The "Edge L2 Loop" event is generated by VMware SD-WAN Edge when the edge determines that it has received a L2 Frame with its MAC Address as the Source MAC Address which indicates that there is a L2 loop/broadcast domain where excessive flooding of ethernet frames could be generated. This event will be reported on the Monitor > Events page of the VMware SD-WAN Orchestrator.

Such excessive L2 flooding domains affect the performance and impact the traffic unless a proper solution that would break the L2 Loop and disable the flooding has been put in place.

Resolution

Once "Edge L2 Loop" event has been reported, use the following steps to overcome it:

1- Verify the physical topology that is showing the edge connectivity to upstream/downstream switches and break the loop to remove redundant links when necessary.

Sample topologies that create L2 Loops :
                                                                                                          
                                                                                                                                      
2- As per design requirements try to break the L2 Loop by either removing redundant links or convert switched interfaces to routed Ports.

3- If you still have questions, please contact your support provider for further assistance. If you have support entitlement with VMware SD-WAN, please raise a Support Request.
If you are supported through a partner, work with the partner for these queries and decision making.