Hi,

Probably you can try this:

ipmitool -I lanplus -H <iDRAC_IP> -U <username> -P <password> chassis power cycle

or using RACADM:

racadm -r <iDRAC_IP> -u <username> -p <password> serveraction powercycle

@DELL-Joey C​ Using RADACM isn't possible. This feature is not available on iDRAC Basic (as stated in the feature table). RACADM connects and then shows a licensing error message.

Your different ipmitool command also doesn't work. No command works. The server refuses to accept ipmitool connections (as the error message already tells)...

Hi,

Well, the error "Error: Unable to establish IPMI v2 / RMCP+ session" can be some issues, have you tried using -vvv to check the error to get additional information of possible cause of the issue?eg: 

ipmitool -vvv -I lanplus -H <iDRAC_IP> -U <username> -P <password> chassis power cycle

Also, I assume that iDRAC configuration has IPMI enabled? 

I found this forum discussing about the same error: https://dell.to/3ZlEUQd. One of the user stated about:

"To fix it, edit the user ("iDRAC Settings" -> "User Authentication" -> Select user -> "Modify User") and then adjust "Maximum LAN User Privilege Granted" to something other than Administrator. Save, then set it back to Administrator, and it should start working."

@DELL-Joey C​ You seem to have absolutely zero knowledge of iDRAC. In iDRAC Basic Management it is impossible to access the iDRAC Web Interface. The only option you can do is import a license. There are no options whatsoever. Not even the Service Tag is shown so you could license iDRAC. You can't see or change any options. You can't access SSH and RACADM. Literally absolutely nothing can be done and the term "Management" in "Basic Management" is severely exaggerated.

Hello,

if the iDRAC refuse ipmitool connection I don't see other way to communicate with the server, sorry. You need to have someone onsite to perform troubleshooting.

Thanks