Re: Help with IPMB (IPMI over I2C).

["guilin1985@126.com" <guilin1985@126.com>]

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If you use IPMB，two bmc need to set  different IPMB i2c slave address. 

This is not easy to do for two BMCs using the same image

 Maybe you can use uart instead.  The difficulty is that you need to write your own code to implement ipmi serialbridge.

Ipmitool use Like this：


root@bmc:/# ipmitool -I serial-terminal -D /dev/ttyS3:115200 lan print 1
Set in Progress                 : Set Complete
Auth Type Support           : 
Auth Type Enable             : Callback : 
                                         : User     : 
                                         : Operator : 
                                         : Admin    : 
                                         : OEM      : 
IP Address Source            : Static Address
IP Address                        : 10.0.0.235
Subnet Mask                    : 255.255.0.0
MAC Address                   : a0:19:b2:94:0c:03
Default Gateway IP          : 10.0.0.1
Default Gateway MAC     : 00:00:00:00:00:00
802.1q VLAN ID               : Disabled
RMCP+ Cipher Suites      : 3,17
Cipher Suite Priv Max      : aaaaaaaaaaaaaaa
                                         :     X=Cipher Suite Unused
                                         :     c=CALLBACK
                                         :     u=USER
                                         :     o=OPERATOR
                                         :     a=ADMIN
                                         :     O=OEM
Bad Password Threshold  : Not Available
root@bmc:/# 
root@bmc:/# ipmitool -I serial-terminal -D /dev/ttyS3:115200 sdr elist
board curr            | 00h | ok  | 23.1 | 1.00 Amps
psu2 curr in         | 01h | ok  | 14.2 | 0 Amps
psu2 curr out       | 02h | ok  | 14.2 | 1 Amps
Pwm 1                  | 03h | ok  | 29.1 | 79.97 percent
Pwm 2                  | 04h | ok  | 29.2 | 79.97 percent
Pwm 3                  | 05h | ok  | 29.3 | 79.97 percent
Pwm psu2 Fan 1   | 06h | ok  | 14.2 | 30.18 percent
fan1                      | 07h | ns  | 29.1 | No Reading
fan2                      | 08h | ns  | 29.2 | No Reading
fan3                      | 09h | ns  | 29.3 | No Reading
psu2 fan               | 0Ah | ok  | 14.2 | 3276 RPM
board power        | 0Bh | ok  | 23.1 | 192.08 Watts
psu2 power in      | 0Ch | ok  | 14.2 | 18.90 Watts
psu2 power out   | 0Dh | ok  | 14.2 | 12.60 Watts
total power          | 0Eh | ok  | 23.1 | 195.30 Watts
cpu 0                    | 0Fh | ns  | 23.3 | No Reading
pch temp             | 10h | ns  | 23.2 | No Reading
psu2 temp           | 11h | ok  | 14.2 | 33 degrees C
battery                 | 12h | ok  | 40.1 | 3.00 Volts
board vol             | 13h | ok  | 23.1 | 11.98 Volts
psu2 vol in           | 14h | ok  | 14.2 | 218.54 Volts
psu2 vol out        | 15h | ok  | 14.2 | 11.98 Volts
 
From: Bala Subramaniyan
Date: 2024-06-20 18:43
To: openbmc@lists.ozlabs.org
CC: Thangaraj S; Lalit Kumar
Subject: Help with IPMB (IPMI over I2C).

Hi All,

For one of our requirement (BMC to BMC, IPMI over I2C), We're exploring with IPMITOOL.

Development Board: ASPEED AST2600 EVB

Could you please suggest us how to proceed further with our below requirement.
BMC to BMC (IPMI over I2C), One BMC as Master and other as slave.
Send/Receive IPMI commands through IPMITOOL from one BMC to other.
Send/Receive SDR, SEL logs between two BMC's.
Any help would be highly appreciated.



Thanks, and regards,
Bala Subramaniyan M,


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