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Dell EMC iDRAC Service Module 4.2.0.0 User’s Guide

Isolation of OS to iDRAC Pass-through Independent feature

When iSM is unable to establish communication with iDRAC over the OS to iDRAC Pass-through interface, the iSM runs in the Limited Functionality mode and the core service remains functional. When iSM is running in the Limited Functionality mode, the following message with informational severity is logged on the host operating system:

ISM0056: The iDRAC Service Module is running with Limited Functionality Mode, hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.

On disabling the OS to iDRAC Pass-through interface from the iDRAC, iSM continues to run in the Limited Functionality mode. When iSM runs in the Limited Functionality mode, the iSM status in the iDRAC interface is displayed as Not running. If the OS to iDRAC Pass-through interface is enabled again, all feature states are updated according to the iSM configuration. During iDRAC reset, reboot, and racresetcfg, iSM switches to the Limited Functionality mode temporarily and restores back after the communication is reestablished. The feature is compatible with all operating systems supported on iSM 4.2.0.0 and later version.

Table 1. iSM features available on Limited Functionality modeThe table lists the iSM features available in limited functionality mode.
Feature iSM support
OS Information (name, version and hostname) Yes
Auto System Recovery (ASR) Yes
iDRACHardReset Yes
FullPowerCycle (VAC) Yes
Table 2. Tools and the console messages on Limited Functionality modeThe table lists the tools and the console messages that are displayed on Limited Functionality mode.
Tool Console messages
dcismcfg The iDRAC Service Module is running with Limited Functionality Mode hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.

The message is displayed while running the following commands:

  • [--collectperiodicsmartlog/-c] {TRUE,FALSE} Use TRUE/FALSE to Enable/Disable Periodic SMART log collection feature
  • [--getismstatus/-g] iDRAC service Module status
Invoke-SupportAssistCollection The iDRAC Service Module is running with Limited Functionality Mode hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.
Invoke-iDRACLauncher The iDRAC Service Module is running with Limited Functionality Mode hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.
Enable-iDRACSNMPTrap.sh (Linux) The iDRAC Service Module is running with Limited Functionality Mode hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.
dcism-sync The iDRAC Service Module is running with Limited Functionality Mode hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.
Enable-iDRACAccessHostRoute (Linux) The iDRAC Service Module is running with Limited Functionality Mode hence some features are unavailable. Possible reasons are: 1) OS-to-BMC Passthrough setting in iDRAC is disabled 2) USBNIC interface on the host OS does not have a configured IP address.
Enable-iDRACAccessHostRoute (Window) Global handler is not available for iSM. Ensure that iSM service is running and OS to iDRAC Pass-through communication channel is enabled.
ESXi operating system running status in limited mode iSM is active (running limited functionality)
EnableInBandSNMPTraps (Windows)

winrm i EnableInBandSNMPTraps wmi/root/cimv2/dcim/dcim_ismservice?instanceid="ismexportedfunctions" @{state="1"}

EnableInBandSNMPTraps_OUTPUT ReturnValue = 34


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