Users Guide

Resource Management Portlets and Editors | Resource Management
164 OMNM 6.5.3 User Guide
The fields that appear in this editor vary, depending on the type of authentication. The ID (name)
for the authentication is mandatory. If you
Add an existing authentication, for example to
Discovery , you can also configure the Management Interface Parameters like Timeout, Retries , and
Port used. If you have an authentication that works for multiple protocols (for example SSH or
Telnet), you can also select the
Protocol Type.
NOTE:
Discovery can fail because of network latency/timeout issues. Increasing the timeout or retries for
OpenManage Network Manager authentications can circumvent that.
CAUTION:
If you do not get access to the deepest level of authentication—for example the “enable” user—you
cannot access all of OpenManage Network Manager’s functionality. Also: many devices require more
than one authentication—for example SNMP and Telnet/SSH (including that enable authentication).
When attempting to access a device configured with SNMP v3, if you see an error message like
unable to read device serial number for selected credential , discovery fails.
This indicates the SNMP v3 credential is faulty. One common problem: SMNP v3 credentials must
be at least eight characters long. Correct it, and discovery and other access should be available.
OpenManage Network Manager’s SNMP v3 authentications support the following:
•No Auth - No Priv
• Auth with MD5 and SHA digests - No Priv
• Auth with MD5 and SHA digests - Priv with DES, 3DES or AES128 encryption
CAUTION:
The standard for SNMP v3 passwords is eight characters or larger. Some devices may accept shorter
passwords, but OpenManage Network Manager requires eight characters or longer. Also: Traps from an
SNMP v3-accessed device do not appear when you change an SNMP v3 login or password on the
device or OpenManage Network Manager, unless you resync the device, or until an SNMP monitor polls
the device. Finally: Rebooting an SNMP v3 device may change the number for the SNMP v3 engine. You
must restart application server to pick up this change.
Use the Equipment and User Groups tabs to associate the authentication you configure here to
devices or groups of users.