Cisco’s Unified Computing System (UCS) continues to innovate in providing a powerful platform for data center infrastructure, but even with frequent updates, occasional bugs arise. In the recent Cisco UCS release 4.3(4a), a notable issue surfaced with the deployment of the Cisco UCSX-9508 chassis, leading to a power status error in the Cisco UCS Manager (UCSM) interface.
This issue, identified as BUG CSCwj01478, involves PSU view displays Power: Error and Input Source: Unknown in UCSM that do not reflect the actual physical status of the hardware.
Symptom Overview
Users deploying the Cisco UCSX-9508 chassis, integrated with Cisco UCS 6454 Fabric Interconnects (FI) and the Cisco UCS 9108 25G Intelligent Fabric Module (IFM), may encounter the following symptoms:
- Power Display Issue: In UCSM, the chassis power status shows as “Power: Error” and “Input Source: Unknown,” even though the physical server PSU LEDs are green, indicating normal operation.
- Persistent Faults: Major faults associated with the power status do not resolve within UCSM, even after attempts to decommission and re-acknowledge the chassis.
While these symptoms do not affect the physical functionality of the power supply, the discrepancy in UCSM’s display can complicate administrative monitoring and fault management workflows.
Summary: As a personal workaround, I set the FAN policy to MAX, which temporarily resolved the issue. However, the release of 4.3(4a) has now provided an official solution.
Links: Release Notes for Cisco UCS Manager, Release 4.3
