Troubleshooting the iLO 3 MP subsystem
This subsection provides information on troubleshooting issues with the iLO 3 MP subsystem.
iLO 3 MP LAN LED on the rear panel
The iLO 3 MP LAN supports two LEDs, viewable from the rear of the system:
•
iLO 3 LAN link LED, which indicates link speed
•
iLO 3 LAN activity, which indicates link activity
Table 35 iLO 3 MP LAN Activity LED states
LED state
Link status
Flashing green
Activity
Steady green
Link with no activity
Off
No link
NOTE:
For information on the LAN LED, see
Troubleshooting the I/O subsystem
This subsection provides information on troubleshooting issues with the I/O subsystem and public
PCIe slots.
I/O subsystem behaviors
The main role of the I/O subsystem is to transfer blocks of data and instruction words between
physical shared memory and virtual memory (system disks or disk array). The system boot is the
first time blocks of data and instructions are transferred into physical memory from a local disk or
DVD or over the network. This process is referred to as Direct Memory Access (DMA) and is initiated
by I/O devices located in I/O or on Host Bus Adapter (HBA) I/O cards and does not involve any
logical processors.
In addition, system firmware performs the following tasks to configure the I/O subsystem:
1.
Sets up the PCIe Root Complex.
Initialize and configure all root ports.
Initialize and configure all I/O devices, including memory space and I/O port space allocation.
2.
Performs a depth-first PCI bus walk to discover all PCI/PCIe devices.
NOTE:
Device drivers should not require legacy I/O port space, so devices that don’t get
any should still be functional. System firmware will also produce the appropriate EFI protocols
for PCI/PCIe devices which are found. System firmware will provide data to ACPI for devices
that cannot be discovered by PCI bus walk.
3.
Allocates MMIO resources, including I/O port space, LMMIO and GMMIO resources to each
device found.
Resources are allocated first to core devices which require it (SAS, UHCI, Gromit, VGA), and
then to any other devices that may need it.
4.
Handles I/O configuration errors.
Firmware uses the memory address table to determine the location and size of the MMCFG,
LMMIO, and GMMIO regions.
5.
Programs APICs.
HP Confidential
Troubleshooting the iLO 3 MP subsystem
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