Pnic status of the transport node is degraded

Products

• VMware NSX

Issue/Introduction

An alarm stating "Pnic status of the transport node is degraded" is reported in the NSX Manager UI 

For this particular problem, syslog has the following log messages printed
2025-09-07T12:28:49.240Z WARNING NSX 4073 [nsx@4413 comp="nsx-edge" subcomp="datapathd" s2comp="intel-rte" level="WARN"] PCI_BUS: 0000:0b:00.0 setup device failed
2025-09-07T12:28:49.273Z WARNING NSX 4073 [nsx@4413 comp="nsx-edge" subcomp="datapathd" s2comp="intel-rte" level="WARN"] PCI_BUS: Requested device 0000:0b:00.0 cannot be used

Environment

VMware NSX

Cause

The issue only happens at datapath startup.

The issue is caused by the failure of the Edge kernel to gracefully handle a (temporary) resource issue in the ESXi host when edge datapath comes up and probes the virtual PCI devices.

 

 

Resolution

This issue has been fixed in versions 4.2.4, 9.0.2, 9.1.

The fix makes sure that probing succeeded for all configured interfaces. If there is a failure, datapath is restarted.

 

 

Additional Information

Workaround:

Monitor the edge interfaces when datapath is restarted by executing the command "get interfaces |grep -i up -A 1 -B 3" in admin mode. If the interface which is connected to a port group is reported as down, the workaround is to restart dataplane (command pasted below).

From the edge CLI in admin mode nsx-edge> restart service dataplane