HP Moonshot 1500 Chassis User Manual download pdf (Page 84)

Table 55 Get LAN configuration parameters request and response data

Data fieldRequest data byte

number

[7]1

• 0b = Get parameter

• 1b = Get parameter revision only

[6:4] - Reserved

[3:0] - Channel number

Parameter selector2

Set Selector. Selects a given set of parameters under a given Parameter selector value. 00h

if parameter doesn’t use a Set Selector.

Block Selector (00h if parameter does not require a block number)4

Data fieldResponse data

byte number

Completion Code.1

Generic codes, plus following command-specific completion code(s):

80h = parameter not supported.

[7:0] - Parameter revision.2

Format: MSN = Present revision. LSN = Oldest revision with which the parameter is backward

compatible. 11h for parameters in this specification.

The following data bytes are not returned when the ‘get parameter revision only’ bit is 1b.

Configuration parameter data, per Table 56 (page 84). If the rollback feature is implemented,

the MC makes a copy of the existing parameters when the ‘set in progress’ state becomes

3:N

asserted (See the Set In Progress parameter #0). While the ‘set in progress’ state is active,

the MC will return data from this copy of the parameters, plus any uncommitted changes

that were made to the data. Otherwise, the MC returns parameter data from non-volatile

storage.

Table 56 LAN configuration parameters

Parameter Data (non-volatile unless otherwise noted)

#Parameter

data 1 - This parameter is used to indicate when any of the following parameters

are being updated, and when the updates are completed. The bit is primarily

0Set In Progress

(volatile)

provided to alert software than some other software or utility is in the process of

making changes to the data. An implementation can also elect to provide a

‘rollback’ feature that uses this information to decide whether to ‘roll back’ to the

previous configuration information, or to accept the configuration change.

If used, the roll back shall restore all parameters to their previous state. Otherwise,

the change shall take effect when the write occurs.

[7:2] - reserved

[1:0] -

• 00b = set complete. If a system reset or transition to powered down state occurs

while ‘set in progress’ is active, the MC will go to the ‘set complete’ state. If

rollback is implemented, going directly to ‘set complete’ without first doing a

‘commit write’ will cause any pending write data to be discarded.

• 01b = set in progress. This flag indicates that some utility or other software is

presently doing writes to parameter data. It is a notification flag only, it is not

a resource lock. The MC does not provide any interlock mechanism that would

prevent other software from writing parameter data while.

• 10b = commit write (optional). This is only used if a rollback is implemented.

The MC will save the data that has been written since the last time the ‘set in

84 Command specification

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