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Hi Alexander,</div>
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Thanks for your reply,</div>
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ipmitool has raw and i2c commands, Please refer below image. </div>
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<br>
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<span><img size="122453" contenttype="image/png" style="max-width: 607px;" data-outlook-trace="F:1|T:1" src="cid:87b5aef4-9628-47c7-b7d4-b714b7a92869"></span></div>
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As,<i> </i>I can see ipmi_rawi2c_main() function under <a href="https://github.com/openbmc/ipmitool/blob/master/lib/ipmi_raw.c" id="LPlnk154330" class="OWAAutoLink" title="https://github.com/openbmc/ipmitool/blob/master/lib/ipmi_raw.c">
ipmitool/lib/ipmi_raw.c</a> which is handling I2C Master Read-Write functionality.<br>
<br>
Can you please guide us on this, Whether we can use this to perform BMC-to-BMC communication.</div>
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Below is the error i'm getting while performing BMC-to-BMC Master-Slave Read-Write by connecting two i2c buses between the boards.</div>
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<span style="background-color: rgb(255, 128, 0);">root@ast2600-default:~# ipmitool i2c bus=14 0x12 0x00 0x00 0x00 0x31 0x32 0x33 0x34 </span></div>
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<span style="background-color: rgb(255, 128, 0);">ipmi_master_write_read: rsp_value:6207408, LineNo:104<br>
I2C Master Write-Read command failed: Invalid command<br>
ipmi_rawi2c_main: rsp_value:0, LineNo:264<br>
Unable to perform I2C Master Write-Read<br>
</span></div>
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<b>Thanks, and regards,</b></div>
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<b>Bala Subramaniyan M,</b></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Alexander A. Filippov <a.filippov@yadro.com><br>
<b>Sent:</b> Thursday, June 20, 2024 6:06 PM<br>
<b>To:</b> Bala Subramaniyan <Bala.Subramaniyan@Ltts.com><br>
<b>Cc:</b> openbmc@lists.ozlabs.org <openbmc@lists.ozlabs.org>; Thangaraj S <Thangaraj.S@Ltts.com>; Lalit Kumar <Lalit.Kumar2@ltts.com><br>
<b>Subject:</b> Re: Help with IPMB (IPMI over I2C).</font>
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On Thu, Jun 20, 2024 at 10:43:59AM +0000, Bala Subramaniyan wrote:<br>
> Hi All,<br>
<br>
Hi,<br>
<br>
><br>
> For one of our requirement (BMC to BMC, IPMI over I2C), We're exploring with IPMITOOL<<a href="https://github.com/openbmc/ipmitool">https://ind01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fopenbmc%2Fipmitool&data=05%7C02%7CBala.Subramaniyan%40ltts.com%7Ccc4bd8ff67674469a56408dc9125913a%7C311b33788e8a4b5ea33fe80a3d8ba60a%7C0%7C0%7C638544837919310123%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C60000%7C%7C%7C&sdata=xV3gj1uMoigTrD9EV%2FzSYWUCrQG9KBqM8RMHAfkbjL4%3D&reserved=0</a>>.<br>
><br>
> Development Board: ASPEED AST2600 EVB<br>
><br>
> Could you please suggest us how to proceed further with our below requirement.<br>
><br>
> 1.<br>
> BMC to BMC (IPMI over I2C), One BMC as Master and other as slave.<br>
> 2.<br>
> Send/Receive IPMI commands through IPMITOOL<<a href="https://github.com/openbmc/ipmitool">https://ind01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fopenbmc%2Fipmitool&data=05%7C02%7CBala.Subramaniyan%40ltts.com%7Ccc4bd8ff67674469a56408dc9125913a%7C311b33788e8a4b5ea33fe80a3d8ba60a%7C0%7C0%7C638544837919318108%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C60000%7C%7C%7C&sdata=2Ofk6FFhvtt9DE2Ku6l9E%2Bogf4rDoAnKLJ8IaKCAvnA%3D&reserved=0</a>>
from one BMC to other.<br>
> 3.<br>
> Send/Receive SDR, SEL logs between two BMC's.<br>
><br>
> Any help would be highly appreciated.<br>
><br>
><br>
<br>
As I can see, ipmitool has no any interfaces using i2c directly and I never<br>
listen about using i2c as the ipmi transport.<br>
<br>
Google shows me that the similar question already exists and answered:<br>
<a href="https://github.com/ipmitool/ipmitool/discussions/296">https://ind01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fipmitool%2Fipmitool%2Fdiscussions%2F296&data=05%7C02%7CBala.Subramaniyan%40ltts.com%7Ccc4bd8ff67674469a56408dc9125913a%7C311b33788e8a4b5ea33fe80a3d8ba60a%7C0%7C0%7C638544837919323925%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C60000%7C%7C%7C&sdata=CAO3AlVSwGz7qeFnakA69orWVnat2mADwtIrvMsLtX4%3D&reserved=0</a><br>
<br>
As an alternative, You could use lan/lanplus interfaces to communicate with<br>
remote BMC via ethernet.<br>
<br>
<br>
><br>
> Thanks, and regards,<br>
> Bala Subramaniyan M,<br>
><br>
><br>
><br>
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