Users Guide

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: Why are Dell devices discovered using WS-Man with root CA certificate getting classified

as Unknown?

Answer: There may be a problem with the root certificate you are using to discover the WS-Man target(s).

For instructions to discover and inventory WS-Man target(s) using a root CA certificate, see Discovering

and Inventorying Dell Devices Using WS-Man Protocol With a Root Certificate.

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.

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