Users Guide

Table Of Contents
IPv6 communication between iSM and iDRAC over
OS-BMC Pass-thru
The iSM supports both IPv4 and IPv6 modes of communication. After you install iSM, the iSM service attempts to connect
to iDRAC using an IPv4 link-local address. If there is no IP address on the host USB NIC interface, iSM tries to configure
IPv4 address on the host side. This USB NIC interface configuration on the host operating system from iSM is done only
once. iSM remains disconnected from iDRAC if there is any subsequent change in USB NIC configuration that can break the
communication between iSM and iDRAC. If 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 the IPv6 network stack is disabled on the host operating system, then iSM tries again to communicate with iDRAC
using IPv4.
If either of the protocols is 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 USB NIC, 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 USB NIC is already configured with only IPv6 address on the host operating system 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
USB NIC interface are:
In-Band iDRAC Access
In-Band SNMP Get
idrac.local and drac.local
Autoupdate of iSM
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iSM monitoring features