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Table 41. Integrated Devices details (continued)
Option
Embedded NIC1, NIC2, NIC3 and NIC4
I/O Snoop HoldOff Response
Current State of Embedded Video
Controller
SR-IOV Global Enable
OS Watchdog Timer
Empty Slot Unhide
Slot Disablement
Slot Bifurcation
Serial Communication
To view the Serial Communication screen, power on the system, press F2, and click System Setup Main Menu > System
BIOS > Serial Communication.
NOTE:
The serial port is optional for the PowerEdge XR4520c system. The Serial Communication option is applicable only if
the serial COM port is installed in the system.
Table 42. Serial Communication details
Option
Serial Communication
40
Pre-operating system management applications
Description
the primary video. You might have to rearrange the cards in the slots in
order to control which card is the primary video.
Enables or disables the OS interface of the embedded NIC1, NIC2, NIC3 and
NIC4 controller. This option is set to Enabled by default.
NOTE:
If set to Disabled (OS), the embedded NICs may still be available
for shared network access by the embedded management controller. This
function must be configured via the NIC management utilities provided with
your system.
Selects the number of cycles PCI I/O can withhold snoop requests, from the
CPU, to allow time to complete its own write to LLC. This setting can help
improve performance on workloads where throughput and latency are critical.
This option is set to 2K Cycles by default.
Displays the current state of the embedded video controller. The Current
State of Embedded Video Controller option is a read-only field. If the
Embedded Video Controller is the only display capability in the system (that
is, no add-in graphics card is installed), then the Embedded Video Controller
is automatically used as the primary display even if the Embedded Video
Controller setting is set to Disabled.
Enables or disables the BIOS configuration of Single Root I/O Virtualization
(SR-IOV) devices. This option is set to Disabled by default.
If your system stops responding, this watchdog timer aids in the recovery
of your operating system. When this option is set to Enabled, the operating
system initializes the timer. When this option is set to Disabled (the default),
the timer does not have any effect on the system.
Enables or disables the root ports of all the empty slots that are accessible to
the BIOS and operating system. This option is set to Disabled by default.
NOTE:
No slots are present in this system
Auto Discovery Bifurcation Settings allows Platform Default Bifurcation,
Auto Discovery of Bifurcation, and Manual bifurcation Control.
This option is set to Platform Default Bifurcation by default. The slot
bifurcation field is accessible when set to Manual bifurcation Control and
is grayed out when set to Platform Default Bifurcation and Auto Discovery
of Bifurcation.
NOTE:
The slot bifurcation supports on PCIe slot only, does not support
slot type from Paddle card to Riser and Slimline connector to Riser.
Description
Enables the serial communication options. Selects serial communication
devices (Serial Device 1 and Serial Device 2) Serial Device 1in BIOS. BIOS
console redirection can also be enabled, and the port address can be specified.
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