"Network uplink redundancy lost alert" is not cleared when link state goes up

Products

• VMware vSphere ESXi

Issue/Introduction

• vmnic network links are going down and coming back online in a very short time.
  
  i.e.,
  
  (less than 1 second)
  
  vobd.log:
  -----------
  ####-##-##T07:16:41.377Z: [netCorrelator] 691992465133us: [vob.net.vmnic.linkstate.down] vmnic vmnic4 linkstate down
  ####-##-##T07:16:42.034Z: [netCorrelator] 691993122356us: [vob.net.vmnic.linkstate.up] vmnic vmnic4 linkstate up
  
  
• Network uplink redundancy lost alert is not getting cleared on the vCenter Server once the network is up.
  
  

Environment

ESXi 7.x

 

ESXi 8.x

Cause

vobd receives "esx.clear.net.dvport.redundancy.restored", "esx.problem.net.dvport.redundancy.lost" at the same time and does not process the order correctly.

Resolution

ESXi 7.0 P08 (ESXi 7.0 Update 3o) resolves this issue.
ESXi 8.0.1 (ESXi 8.0 Update 1) resolves this issue.

Additional Information

VMware ESXi 7.0 Update 3o Release Notes

PR 3101512: You see a warning for lost uplink redundancy even when the uplink is active

 

If you quickly remove the network cable from a physical NIC and reinsert it, the ESXi host agent, hostd, triggers an event to restore uplink redundancy, but in some cases, although the uplink restores in a second, you still see a misleading alarm for lost uplink redundancy.

 

This issue is resolved in this release.