Log insight reports error "Control plane connection of VXLAN network is down"

Products

• VMware NSX

Issue/Introduction

Control plane down was detected by Log Insight.

Jul 22 16:49:25 CORE-ESXi- vmkwarning: cpu41:2256926)WARNING: vdl2: VDL2CPCheckConnUpCB:377: [nsx@6876 comp="nsx-esx" subcomp="vdl2-17883598"]Control plane connection of VXLAN network[1073742824] is down
Jul 22 16:49:25 CORE-ESXi- Hostd: info hostd[2100011] [Originator@6876 sub=Vimsvc.ha-eventmgr] Event 5469 : event.com.vmware.vxlan.network.cpdown.fullFormat (com.vmware.vxlan.network.cpdown)

Environment

NSX-T version 3.1.x 

Cause

The reported VXLAN network (1073742824) corresponds to an internal network used for the hyperbus channel, which is always in a down state.

• This switch is not created or managed by the customer but is utilized internally by NSX components for container networking.
• The reported log message can be safely ignored as it does not indicate an actual issue in the customer environment.

 

Resolution

In NSX-T version 3.2.0 and later, this alarm is suppressed by default, and the warning no longer appears in Log Insight.