This article outlines how to resolve the issue of missing 'show chassis hardware' and 'show chassis fpc' outputs on a QFX switch following an upgrade.

1) Empty output under the command 'show chassis fpc' post the upgrade.

user@labroot>show chassis fpc

Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%)

Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer

0 Empty

1 Empty

2 Empty

3 Empty

4 Empty

5 Empty

6 Empty

7 Empty

8 Empty

9 Empty

2) No inventory listed under 'show chassis hardware' except the chassis.

user@labroot>show chassis hardware

Hardware inventory:

Item Version Part number Serial number Description

Chassis xxxxxxxxxxx QFX5110-xx

Power-cycle of the switch should resolve the problem. In instances were power-cycle does not fix the issue, need to go for chassis replacement.

Note: Although console logs don't always show the exact cause of an issue, it's important to examine them for any potential indicators.