Users Guide

The following message is displayed in the OS log, even when the OS to iDRAC Pass-through over USBNIC is configured
properly. Why?
The iDRAC Service Module is unable to communicate with iDRAC using the OS to iDRAC Pass-through
channel
iDRAC Service Module uses the OS to iDRAC pass-through over USB NIC feature to establish the communication with iDRAC.
Sometimes, the communication is not established though the USB NIC interface is configured with the correct IP endpoints. This may
happen when the host operating system routing table has multiple entries for the same destination mask and the USB NIC destination is
not listed as the first one in routing order.
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 USB NIC interface. The link-local destination mask is repeated and the USB NIC is not the first one
in the 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, make sure that the iDRAC USBNIC IPv4 address (by default it is 169.254.0.1) is reachable from the
host operating system.
If not:
• Change the iDRAC USBNIC address on a unique destination mask.
• Delete the entries that are not required from the routing table to make sure that USB NIC is chosen by route when the host wants to
reach the iDRAC USB NIC IPv4 address.
When uninstalling iDRAC Service Module from a VMware ESXi server, the virtual switch is named as vSwitchiDRACvusb and
port group as iDRAC Network on the Vsphere client. How to delete them?
While installing iDRAC Service Module VIB on a VMware ESXi server, iDRAC Service Module creates the vSwtich and Portgroup to
communicate with iDRAC over the OS to iDRAC Pass-through in USB NIC mode. After the uninstallation, the virtual switch
vSwitchiDRACvusb and the port group iDRAC Network are not deleted. To delete it manually, perform one of the following steps:
• Go to vSphere Client Configuration wizard and delete the entries.
• Go to the Esxcli and type the following commands:
• To remove port group: esxcfg-vmknic -d -p "iDRAC Network"
• To remove vSwitch: esxcfg-vswitch -d vSwitchiDRACvusb
NOTE:
You can reinstall iDRAC Service Module on the Vmware ESXi server as this is not a functional issue for the
server.
Where is the Replicated LifeCycle log available on the Operating System?
To view the replicated Lifecycle logs:
Operating System
Location
Microsoft Windows
Event viewer > Windows Logs > System. All the iDRAC Service
Module Lifecycle logs are replicated under the source name iDRAC
Service Module.
Red Hat Enterprise Linux , SUSE Linux, CentOS, and Citrix
XenServer
/var/log/messages
VMware ESXi
/var/log/syslog.log
What are the Linux dependent packages or executables available for installation while completing the Linux installation?
To see the list of Linux dependent packages, see the Linux Dependencies section in the iDRAC Service Module Installation Guide.
Frequently Asked Questions
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