4.10 Pxe Bios Support; 4.11 Console Redirection - Intel SE7520JR2 Technical Manual

System BIOS

4.10 PXE BIOS Support

The BIOS will support PXE-compliant implementations that:
• Locate and configure all PXE-capable boot devices (UNDI Option ROMs) in the system,
both built-in and add-ins.
•
Supply a PXE according to the specification if the system includes a built-in network device.
• Meet the following specifications: System Management BIOS (SMBIOS) Reference
Specification v2.2 or later. The requirements defined in Sections 3 and 4 of the BIOS Boot
Specification (BBS) v1.01or later, to support network adapters as boot devices. Also,
supply a valid UUID and Wake-up Source value for the system via the SMBIOS structure
table.

4.11 Console Redirection

The BIOS supports redirection of both video and keyboard via a serial link (Serial A or Serial B).
When console redirection is enabled, the local (host server) keyboard input and video output
are passed both to the local keyboard and video connections, as well as to the remote console
via the serial link. Keyboard inputs from both sources are valid and video is displayed to both
outputs. As an option, the system can be operated without a keyboard or monitor attached to
the host system and can run entirely from the remote console. Setup and any other text-based
utilities can be accessed through console redirection.
The BIOS will take the Setup values for Serial console redirection and map them to the ACPI
SPCR tables. The BIOS setup tokens for serial console will also read the BMC serial console
values to sync up.
Text-based console redirection is also supported over the Serial Over LAN (SOL) protocol. SOL
is built on top of the IPMI-over-LAN infrastructure specified in the IPMI 2.0 specification. When
the SOL feature is activated by establishing a LAN connection to the BMC and activating the
SOL to be enabled, the EMP-based connectivity is disabled.
The IMM uses UDP datagrams to send SOL character data as "SOL Messages". The "SOL
Messages" packet format follows that used for IPMI-over-LAN with extensions to support SOL
Messages as a new message type. SOL requires the support of the VT/UTF-8 character set
specified in the Microsoft* Windows.Net* headless requirements from Microsoft. The application
displaying SOL data must be VT/UTF-8 aware. The console sends keystrokes in a UDP packet
to the server.
If the session ID of SOL matches the session ID in boot block info, then the BIOS starts serial-
based redirection services. If the session IDs do not match, the BIOS follows the path specified
in the IPMI section and launches LAN or serial console redirection services.
BIOS Console redirection terminates before giving control to an operating system. The
operating system is responsible for continuing the Console Redirection after that point. BIOS
console redirection is a text-based console and any graphical data, such as a logo, is not
redirected.
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Intel® Server Board SE7520JR2
Revision 1.0