This article will provide a explanation of PIO errors.
Dec 22 20:45:12.361 switch fpc0 trinity_pio: 20 PIO errors occurred
Dec 22 20:45:12.361 switch fpc0 trinity_pio: Last error: 10 pe4 Paradise PCI 0x00000150 Read PCIe 0
Dec 22 20:44:52.361 switch fpc0 trinity_pio: 16 PIO errors occurred
Dec 22 20:44:52.361 switch fpc0 trinity_pio: Last error: 10 pe4 Paradise PCI 0x00000150 Read PCIe 0
Dec 22 20:44:52.361 switch fpc0 trinity_pio: Last error: Register Addr 0x05908150
Dec 22 20:45:02.372 switch fpc0 trinity_pio: 20 PIO errors occurred
Dec 22 20:45:02.383 switch fpc0 trinity_pio: Last error: 10 pe4 Paradise PCI 0x00000150 Read PCIe 0
Dec 22 20:45:02.392 switch fpc0 trinity_pio: Last error: Register Addr 0x05908150
Dec 22 20:45:12.361 switch fpc0 trinity_pio: Last error: Register Addr 0x05908150
Dec 22 20:45:22.362 switch fpc0 trinity_pio: 20 PIO errors occurred
Dec 22 20:45:22.362 switch fpc0 trinity_pio: Last error: 10 pe4 Paradise PCI 0x00000150 Read PCIe 0
Dec 22 20:45:22.362 switch fpc0 trinity_pio: Last error: Register Addr 0x05908150
These errors occur when the FPC is trying to read/write some data from one of the PFE ASICs via PCI bus and it failed to do so.
A single occurrence of this message likely indicates a one-time transient hardware error. However, multiple consecutive occurrences suggest persistent underlying issues, possibly related to a faulty FPC. In such cases, an FPC reboot resolve the issue.
As a workaround, please proceed to reboot the effected FPC in a maintenance window and monitor the logs.
user@switch> request chassis fpc slot slot-number (offline | online | restart)
For further assistance and to investigate the root cause, please open a JTAC case.