Cisco Bug: CSCup18799 - ISR 4451-X Silent Reload due to Power Supply Signal Noise
Mar 23, 2020
- Cisco 4000 Series Integrated Services Routers
Known Affected Releases
Symptom: ISR4451-X router may reload silently. Last reset reason will be recorded as "PowerOn". Example output from 'show version': ISR4451 uptime is 14 minutes Uptime for this control processor is 17 minutes System returned to ROM by reload System restarted at 06:04:27 CDT Wed Jul 2 2014 System image file is "bootflash:/isr4400-universalk9.03.10.02.S.153-3.S2-ext.SPA.bin";; Last reload reason: PowerOn Conditions: This applies to ISR4451-X and ISR 4431 platforms. It does not apply to PowerOn reloads on other IOS or IOS-XE platforms. This issue is suspected to be triggered by AC noise on the circuit(s) supplying the router. The problem may be more likely to occur when the router is connected to one or more uninterruptible power supply (UPS) and/or power distribution unit (PDU) devices. However, it has also been seen when the router was powered directly from 'wall power'.
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Bug Details Include
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