Users Guide

Table Of Contents
additional information about the supported
servers. What should I do now?
Before installing the iDRAC Service Module, ensure that the server or the system on which the iDRAC Service Module is to be installed is
a Dell’s 12
th
generation PowerEdge server or later. Also make sure that you have a 64-bit system.
I see the messageThe iDRAC Service Module is
unable to communicate with iDRAC using the OS
to iDRAC Pass-through channel in the OS log,
even when the OS to iDRAC Pass-through over
USBNIC is configured properly. Why do I get this
message?
iDRAC Service Module uses the OS to iDRAC Pass-through over USBNIC to establish communication with iDRAC. Sometimes, the
communication is not established though the USBNIC interface is configured with correct IP endpoints. This may happen when the host
OS routing table has multiple entries for the same destination mask and the USBNIC destination is not listed as the first one in routing
order.
Table 8. Details
Destination Gateway Genmask Flags Metric Ref Use Iface
default 10.94.148.1 0.0.0.0 UG 1024 0 0 em1
10.94.148.0 0.0.0.0 255.255.255.0 U 0 0 0 em1
link-local 0.0.0.0 255.255.255.0 U 0 0 0 em1
link-local 0.0.0.0 255.255.255.0 U 0 0 0 enp0s20u12u3
In the example enp0s20u12u3 is the USBNIC interface. The link-local destination mask is repeated and the USBNIC is not the first one in
order. This results in the connectivity issue between iDRAC Service Module and iDRAC over the OS to iDRAC Pass-through. To
troubleshoot the connectivity issue, you can perform one of the following steps:
Ensure that the iDRAC USBNIC IPv4 address (by default it’s 169.254.0.1) is reachable from the host OS. If not:
Change the iDRAC USBNIC address on a unique destination mask.
Delete the unwanted entries from the routing table to ensure USBNIC is chosen by route when the host wants to reach the iDRAC
USBNIC IPv4 address.
Whenever I try to install the iDRAC Service
Module, an error message This operating system is
not supported is displayed.
The iDRAC Service Module can be installed only on the supported operating systems. For information on operating systems that are
supported, see Supported operating systems.
Frequently asked questions
33