Users Guide

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.
Question: I have discovered the server with the SNMP protocol, but the RAC name of the iDRAC is not displayed in the device tree,
portals, and wizards.
Answer: RAC name is displayed only if you have discovered the iDRAC with the WS-Man protocol. Otherwise, the system name is
displayed instead of the RAC name.
Question: Why do devices that are already discovered disappear from the device tree during discovery?
Answer: This issue occurs when there are duplicate MAC addresses, which are typically observed with virtual devices that may have
MAC addresses that contain only 16 zeroes.
To resolve this issue:
1. Ensure that you are logged in to the operating system with administrative privileges.
NOTE: Ensure that you create a backup copy of the dcong.ini le before you make any changes.
2. Open the dcong.ini le available at SysMgt\Essentials\conguration.
3. Edit the PRIVATE_MAC_EXCLUDE_LIST line as follows:
PRIVATE_MAC_EXCLUDE_LIST=127.0.0.1,0.0.0.0,005345000000,33506F453030,505054503030,0000FFFFFFFF,
204153594EFF,000000000000,00000000000000e0,020054554e01,204153594e,0000000000000000
4. Save the dcong.ini le, and restart the OpenManage Essentials services.
Question: I discovered a PowerEdge FN IO Aggregator (IOA) with SNMP protocol. Why is the Service Tag of the FN IOA displayed
as N/A in the device inventory?
Answer: FN IOAs that were manufactured prior to February 1, 2016 do not have a Service Tag. Therefore, the Service Tag is
displayed as N/A.
Question: When trying to discover the Dell devices using WS-Man protocol, an error message is displayed, stating a failure to
connect with basic authentication. What do I do?
Answer: This issue is because, the authentication type Basic was not enabled on the OpenManage Essentials system. To enable the
Basic authentication type on OpenManage Essentials system, see the Authentication for Remote Connections knowledge base
article at Microsoft.com.
Below is the expected conguration for winrm to work:
>winrm get winrm/config/client
Client
NetworkDelayms = 5000
URLPrefix = wsman
AllowUnencrypted = false
Auth
Basic = true
Digest = true
Kerberos = true
Negotiate = true
Certificate = true
CredSSP = false
DefaultPorts
HTTP = 5985
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