Owners Manual

Ethtool reports 10 GbE port speed instead of 25 GbE when
using Mellanox mlx5_core driver
Description On Dell EMC PowerEdge servers installed with Red Hat Enterprise Linux 6.8, the Mellanox ConnectX-4 Lx 25 GbE
Ethernet adapter link speed is reported as 10 GbE instead of 25 GbE.
Cause The Ethtool utility does not have required patches to identify 25 GbE speed.
Workaround This error message can be ignored because there is no functionality loss.
Resolved issues in Red Hat Enterprise Linux 6.7
Invalid IRQ (255) is assigned to Emulex card when NPAR-EP is
enabled
Description On Dell EMC PowerEdge systems installed with Red Hat Enterprise Linux 6.7 and Emulex OCe14102B-U1-D PCIe
dual port NIC, invalid IRQ (Interrupt Request Line 255) is assigned to some of the extended NIC partitions. The
IRQ 255 is assigned only for six of the eight extended partitions. The rst eight partitions and two partitions from
the extended partitions have the correct IRQ assigned.
Cause This happens due to an issue in kernel, in handling ARI capable devices. As an example, for partitions from 03:01.0
to 03:01.7, the device (of PCI bus/device/function) is incorrectly interpreted as 1 instead of device 0.
Workaround By default functionality is not impacted as the driver enables MSIX interrupts. Avoid direct assignment of partitions
with IRQ 255 to guest OS.
Known issues in Red Hat Enterprise Linux 6.7
ACPI displays warning message when system IO range
conicts
Description
The Advanced Conguration and Power Interface (ACPI) displays a warning message, if there is a conict between
the system input/output (IO) and operation address range (OpRange).
Cause The latest kernel in Red Hat Enterprise Linux 6.7 with ACPI_check_resource_conflict() checks for entire
address range for particular device. In the watchdog timer and General-purpose input/output (GPIO), the memory
address that is mapped by system IO and OpRange is accessed by both ACPI and operating system.
Workaround This error message can be ignored because there is no functionality loss.
Kernel fails to get CPU APIC ID
Description
The Kernel fails to get CPU APIC ID error message is displayed, when the BIOS Advanced
Programmable Interrupt Controller (APIC) table has static entries for all the APIC IDs for highest conguration core
processors.
16 Installation instructions and important information