Hello Cisco Community,
I recently purchased a used Cisco 2811 router (PID: CISCO2811, S/N: FTX1421AHUZ) and replaced its original AC power supply with a DC power supply. However, the command show env all still shows "Main Power Supply is AC" even though only a single DC power supply is connected. The router boots up normally, and the DC power input is confirmed to be working.
Details:
IOS Version: 12.4 (17a)
Modules Installed:
Commands & Outputs:
Router#show inventory
NAME: "2811 chassis", DESCR: "2811 chassis"
PID: CISCO2811, VID: V08, SN: FTX1421AHUZ
NAME: "PVDMII DSP SIMM with four DSPs", DESCR: "PVDMII DSP SIMM with four DSPs"
PID: PVDM2-64, VID: V01, SN: FOC14191KZN
NAME: "16 Port 10BaseT/100BaseTX EtherSwitch", DESCR: "16 Port 10BaseT/100BaseTX EtherSwitch"
PID: NM-16ESW, VID: V01, SN: FOC104421SY
Router#show env all
Main Power Supply is AC
Fan 1 OK
Fan 2 OK
Fan 3 OK
System Temperature: 24 Celsius (normal)
Environmental information last updated 00:00:05 ago
Issue Summary:
The router detects the power supply as AC despite using a DC power unit.
I suspect this is an IOS 12.4(17a) bug, but I couldn't find any official Cisco documentation or Bug ID related to this issue.
Questions:
Has anyone encountered a similar problem with Cisco 2800 series routers?
Is there a known Bug ID or Cisco document addressing this power supply detection issue?
Since this is a second-hand device, I don't have a Cisco service contract. Any guidance would be greatly appreciated!
Thank you in advance.
