Symptoms

BMC(iDRAC) is not accessible (disconnected) or node type is unknown under the AMSRacadm command returns "ERROR: Unable to perform requested operation"No ssh/telnet access to the iDRAC (the attempted connection times out)No iDRAC browser accessPinging the iDRAC IP Address failsOn the server messages logs : Feb 25 12:52:08 xxxxxxxx dsm_ism_srvmgrd[2447]: ISM0006 [iSM@674.10892.2 EventID="8193" EventCategory="Audit" EventSeverity="error" IsPastEvent="false" language="en-US"] The iDRAC Service Module is unable to communicate with iDRAC using the OS to iDRAC Pass-through channel.

Cause

After maintenance or similar activities, Host management IP and SVM management IP might be working and there is communication, however, the iDRAC is not accessible and not pingable.

Resolution

To resolve this issue: Soft Reset using the i-button or Hard Reset using iDRAC Service Module Refer to option 1 and 4 in the following link:https://www.dell.com/support/article/en-ie/sln305793/how-to-reset-the-internal-dell-remote-access-controller-idrac-on-a-poweredge-server?lang=en#2

Support Cases