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Dell EMC iDRAC Service Module 3.4 User’s Guide

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IPv6 communication between iSM and iDRAC over OS-BMC Passthru

Starting iSM 3.4, iSM supports both IPv4 and IPv6 modes of communication. Once you install iSM, iSM service attempts to connect to iDRAC using IPv4 link-local address. If there is no IP address on the Host USBNIC interface, iSM tries to configure IPv4 address on the Host side. This USBNIC interface configuration on the Host OS from iSM is done only once. iSM remains disconnected from iDRAC if there is any subsequent scenario of incomplete configuration of USBNIC on the Host OS. In case the connection fails even after configuring IPv4 address, iSM tries to connect to iDRAC using IPv6.
  • NOTE: This feature is supported only on Linux operating systems.
  • NOTE: If IPv6 network stack is disabled on the Host OS, then iSM retries to communicate with iDRAC using IPv4.

If either of the protocols are disabled, then iSM will not try to connect to iDRAC using the disabled protocol.

  • NOTE: If the iDRAC firmware version does not support IPv6 on USBNIC, the connection between iSM and iDRAC is established using IPv4.

Respective audit messages are logged by iSM indicating the protocol version using which iSM connected with iDRAC.

  • NOTE: When iDRAC USBNIC is already configured with only IPv6 address on the Host OS and then iSM is installed on the Host, then iSM communication with iDRAC will start using IPv4 protocol.

Unsupported features with IPv6 protocol

The features that are not supported when iSM is configured with IPv6 protocol and IPv4 configuration is not available on the USBNIC interface are:

  • InBand iDRAC Access
  • iDRAC GUI Launcher
  • iDRAC SSO Launcher
  • idrac.local and drac.local
  • Auto-update of iSM

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