Set Channel Access
更新时间： 2026/08/06
在Gitcode上查看源码Set Channel Access
Change History
| openUBMC Version | Revision Date | Description |
|---|---|---|
| 25.06 | 2025/06/26 | Initial draft: add command details |
Basic Information
Function Description
Set channel access.
Privilege
UserMgnt
Command Information
Request Information
| Byte | Data Field |
|---|---|
| NetFn | App 06h |
| CMD | 40h |
| 1 | [7:4]-reserved [3:0]-Channel number |
| 2 | [7:6]-00b=don't set or change Channel Access 01b=set non-volatile Channel Access according to bits [5:0] 10b=set volatile (active) setting of Channel Access according to bits [5:0] 11b=reserved [5]-PEF Alerting Enable/Disable 0b=enable PEF Alerting 1b=disable PEF Alerting on this channel (the Alert Immediate command can still be used to generate alerts) [4]-0b=enable Per-message Authentication 1b=disable Per-message Authentication. [Authentication required to activate any session on this channel, but authentication not used on subsequent packets for the session.] [3]-User Level Authentication Enable/Disable Optional. Return a CCh 'invalid data field' error completion code if an attempt is made to set this bit, but the option is not supported. 0b=enable User Level Authentication. All User Level commands are to be authenticated per the Authentication Type that was negotiated when the session was activated 1b=disable User Level Authentication. Allow User Level commands to be executed without being authenticated If the option to disable User Level Command authentication is accepted, the BMC will accept packets with Authentication Type set to None if they contain user level commands For outgoing packets, the BMC returns responses with the same Authentication Type that was used for the request [2:0]-Access Mode for IPMI messaging (PEF Alerting is enabled/disabled separately from IPMI messaging, see bit 5) 000b=disabled channel disabled for IPMI messaging 001b=pre-boot only channel only available when system is in a powered down state or in BIOS prior to start of boot 010b=always available channel always available for communication regardless of system mode. BIOS typically dedicates the serial connection to the BMC 011b=shared same as always available, but BIOS typically leaves the serial port available for software use |
| 3 | Channel Privilege Level Limit. This value sets the maximum privilege level that can be accepted on the specified channel [7:6]-00b=don't set or change channel Privilege Level Limit 01b=set non-volatile Privilege Level Limit according to bits [3:0] 10b=set volatile setting of Privilege Level Limit according to bits [3:0] 11b=reserved [5:4]-reserved [3:0]-Channel Privilege Level Limit 0h=reserved 1h=CALLBACK level 2h=USER level 3h=OPERATOR level 4h=ADMINISTRATOR level 5h=OEM Proprietary level |
Response Information
| Byte | Data Field |
|---|---|
| 1 | Completion Code generic, plus following command-specific completion codes: 82h=set not supported on selected channel (e.g. channel is sessionless) 83h=access mode not supported |
Command Example
Set channel access.
Request:
bash
ipmicmd -k "0f 00 06 40 01 80 22" smi 0Response:
text
0f 07 00 40 82