This article explains the cause and possible solution for one of the major alarm that is seen on QFX10002 devices.
The alarm observed is as follows:
root@lab> show chassis alarms no-forwarding 2 alarms currently active Alarm time Class Description 2024-04-14 03:00:31 UTC Major Vsensor 12:PE1 AVDD 1.0V Access Failed
The major alarm "Vsensor 12:PE1 AVDD 1.0V Access Failed" indicates that there is a failure in accessing the AVDD (Analog Voltage Digital-to-Digital) power supply for PE1 (Processing Element 1) with a voltage of 1.0V.Possible causes:
Voltage exceeded beyond margin value
Overheating of FPC
Inadequate airflow system
Error logs:
root@spine1-a05-dub> show chassis hardware detail no-forwarding Hardware inventory: Item Version Part number Serial number Description Chassis XXXXXXX Pseudo CB 0 ada0 9316 MB QEMU QM00001 Virtio Block Disk ada1 4096 MB QEMU QM00002 Virtio Block Disk ada2 512 MB QEMU QM00003 Virtio Block Disk ada3 1024 MB QEMU QM00004 Virtio Block Disk usb0 (addr 0.1) UHCI root HUB 0 Intel uhub0 usb1 (addr 1.1) EHCI root HUB 0 Intel uhub1 usb2 (addr 1.2) product 0x0020 32 vendor 0x8087 uhub2 Power Supply 0 REV 05 XXX-XXXXXX XXXXXXXXXXX AC AFO 1600W PSU Power Supply 1 REV 05 XXX-XXXXXX XXXXXXXXXXX AC AFO 1600W PSU Fan Tray 0 QFX10002 Fan Tray 0, Front to Back Airflow - AFO Fan Tray 1 QFX10002 Fan Tray 1, Front to Back Airflow - AFO Fan Tray 2 QFX10002 Fan Tray 2, Front to Back Airflow - AFO
Interfaces shut down, and that can be verified in "show interface terse"
FPC slot show "empty" in "show chassis fpc"
root@lab> show chassis fpc Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer 0 Empty
root@lab> show chassis environment no-forwarding Class Item Status Measurement Temp FPC 0 OCXO Temp Sensor OK 34 degrees C / 93 degrees F FPC 0 PFE0-HMC0-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC0-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC0-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC1-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC1-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC1-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC2-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC2-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE0-HMC2-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC0-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC0-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC0-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC1-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC1-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC1-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC2-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC2-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE1-HMC2-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC0-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC0-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC0-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC1-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC1-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC1-BOT OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC2-DIE OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC2-TOP OK 0 degrees C / 32 degrees F FPC 0 PFE2-HMC2-BOT OK 0 degrees C / 32 degrees F
April 10 07:04:01 [Alarm SET] Object 150 reason 1 Device FRU VOLT SENSOR 12, reason VSensor 12 Read Fai(Vsensor 12:PE1 AVDD 1.0V Access Failed), color 1, slot 0 Alarm id 2516582401 April 10 07:04:01 send: red alarm set, device FRU VOLT SENSOR 12, reason Vsensor 12:PE1 AVDD 1.0V Access Failed
root@lab> show chassis hardware root@lab> show chassis alarms root@lab> show log messages | match VSensor root@lab> show chassis fpc root@lab> show chassis fpc detail root@lab> show chassis environment root@lab> show chassis environment fpc 0 root@lab> show chassis temperature-thresholds
user@host> restart chassis-control