User's Manual

Answer: WMI discovery classifies a device as unknown when the credentials for a user account in the Administrators
group (not Administrator) is supplied for the discovery range in some cases.
If you are seeing this issue, read the KB article at support.microsoft.com/?scid=kb;en-us;951016 and apply the registry
work as described. This resolution applies to managed nodes with Windows Server 2008 R2.
Question: What are SNMP authentication traps?
Answer: An authentication trap is sent when an SNMP agent is hit with an enquiry that contains a community name it
does not recognize. The community names are case-sensitive.
The traps are useful to find if someone is probing a system, although its better nowadays to just sniff packets and find
out the community name.
If you use multiple community names on the network, and some management might overlap, users may want to turn
these off as they become false positives (annoyances).
For more information, see technet.microsoft.com/en-us/library/cc959663.aspx.
When an SNMP agent receives a request that does not contain a valid community name or the host that is sending the
message is not on the list of acceptable hosts, the agent can send an authentication trap message to one or more trap
destinations (management systems). The trap message indicates that the SNMP request failed authentication. This is a
default setting.
Question: Why does OpenManage Essentials not support entering host names with underscore in the discovery wizard?
Answer: Per RFC 952, underscores are not valid in DNS names. A name (net, host, gateway, or domain name) is a text
string up to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus sign (-), and period (.). Periods are only
allowed when they serve to delimit components of domain style names.
For more information see,ietf.org/rfc/rfc952.txt and zytrax.com/books/dns/apa/names.html .
Question: What is On-demand?
Answer: On-demand is an operation where a managed system is checked for status/health by OpenManage Essentials
when an SNMP trap is received. There are no settings to be changed to enable the on-demand feature. However, the IP
address of the management system must be available in the trap destination of SNMP service. An SNMP trap is
received from the managed system when there is an issue or failure of a server component. These traps can be viewed
under the alert logs.
Inventory
Question: What troubleshooting can I do if an inventory task fails to create or run?
Answer: Ensure that DSM Essentials Task Manager service is running in Windows services.
System Update
Question: As an OpenManage Essentials administrator (OMEAdmin), what do I do if I am unable to perform system
updates on devices?
Answer: To resolve this issue, perform one of the following steps:
• Add the OMEAdmin to the server administrator group.
• Reduce the user control settings by clicking Start → Control Panel → User Accounts → Change User Account
Control Settings.
Question: What do I do if iDRAC does not download packages?
Answer: To resolve this issue, ensure that:
• The default website is enabled in IIS.
• The virtual folder (install_packages) is present and is pointing to the SystemUpdate folder.
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