Pre-Boot Only; Always Available; Shared; Disabled - MAXDATA PLATINUM 9000-4R Product Manual

Pre-boot only

The Serial/Modem channel is only available out-of-band while the machine is powered-off and during
POST until the boot process is initiated. This option is primarily used with serial port sharing where
it may be desirable to ensure that the BMC does not take control of the serial port during OS run-
time.
The Pre-boot only setting does not affect Serial/Modem alerting. If alerting is enabled and software does
not handle the event, the BMC takes control of the port for the time it takes to deliver the alert.

Always Available

The channel is dedicated to communication with the BMC and is available during all system states
(powered-down, powered-up, pre-boot, sleep, run-time, etc.).

Shared

Same as Always Available, but the BIOS typically leaves the serial port available for software use.

Disabled

The channel is disabled from being used to communicate with the BMC (except for alerting).

Privilege Level Limit

The channel privilege limit sets the maximum privilege level that users can have on this channel and
it restricts users of the channel to a set of BMC commands that can be issued at that privilege level.
For example, if the channel privilege limit is configured with a maximum privilege level of Operator,
even if a user is configured to have Administrator privilege, no commands that require Administrator
privilege can be executed by that user over this channel.

IPMI Messaging Communication Settings

These parameters are the global settings for IPMI messaging, which include Direct Connect and
Modem modes.
Note that IPMI messaging always occurs with 8 bits/character, no parity, and 1 stop bit. The COM
settings that can be configured are:

Flow Control

This option sets how the flow of data is controlled. Available choices are No Flow Control, CTS/RTS
(hardware handshake), and XON/XOFF .

Baud Rate

This option sets the maximum rate in bits per second at which the data can be transmitted through
the serial port. Available baud rates are 9600, 19200, 38400, 57600, and 115200 kbps. Note that
support for baud rates higher than 19200 is optional and SMU only displays the ones that the BMC
supports.

Enable Data Terminal Ready (DTR) Hang-up

When DTR Hang-up is enabled, hang-up of a modem connection is based on when the DTR signal
becomes inactive. Note that when this is enabled, the modem settings Modem Hang-up and Escape
Sequences are not used.

Default Serial/Modem Configuration Settings Set By the SMU

The SMU sets some serial/modem configuration settings that are not exposed to the user. The list
of these settings is given below. Note that for these settings to be set by the SMU, a user must click
the Save button on the last serial/modem configuration view.
Authentication type enables are enabled. These bits define what types of authentication are enabled
to authenticate messages sent to the BMC by users of different privilege levels. The SMU enables
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