Symptom

Cat9500X-28C8D switch running 17.12.02 or 17.13.01 with both PSUs connected to power source. Both "show environment all" and "show power detail" show both PSU status as active and LEDs are green on both PSUs. Upon disconnect of power cord from PS1 PSU, the LED on that PSU turns red and then turns off as expected. The remaining PS2 PSU is working and the switch continues to operate fine with single remaining PSU. - while the switch continues to operate fine, the show commands indicate that both PSUs have bad input, which is not true/accurate C9500X-28C8D#show power detail Power Fan States Supply Model No Type Capacity Status 0 1 ------ -------------------- ---- -------- --------- ----------- PS1 C9K-PWR-1500WAC ac n.a. bad-input n.a. n.a. PS2 C9K-PWR-1500WAC ac n.a. bad-input n.a. n.a. ... C9500X-28C8D# Upon disconnect of power cord from PS2 PSU, the LED on that PSU turns red and then turns off as expected. The remaining PS1 PSU is working and the switch continues to operate fine with single remaining PSU. - while the switch continues to operate fine, the show commands indicate that both PSUs are active, which is not true/accurate C9500X-28C8D#show power detail Power Fan States Supply Model No Type Capacity Status 0 1 ------ -------------------- ---- -------- --------- ----------- PS1 C9K-PWR-1500WAC ac 1500 W active good n.a. PS2 C9K-PWR-1500WAC ac 1500 W active good n.a. ... C9500X-28C8D# - no log message is generated upon power cord disconnect - upon single power cord reconnect, log message is generated for both PSUs *Dec 12 09:09:18.290: %IOSXE_PEM-6-PEMOK: The Power Supply in slot P1 is functioning properly *Dec 12 09:09:18.297: %IOSXE_PEM-6-PEMOK: The Power Supply in slot P2 is functioning properly

Conditions

Cat9500X switching platform 17.12.02/17.13.01 software redundant PSUs loss of power source on a single PSU

Workaround

use show platform hardware chassis power-supply detail all command to monitor PSU status

Further Problem Description