Tavve zoneranger User Manual page 126

The Clear Engine IDs button will clear all SNMP Engine Ids from the ZoneRanger cache. The
SNMP Engine Ids will be added to the cache if they are discovered again.
Changing user passwords for SNMPv3 devices
Since it is recommended that SNMPv3 passwords be changed periodically, the Administration
> SNMP page SNMPv3 Passwords tab provides a mechanism that facilitates the process of
updating SNMPv3 passwords on ZoneRanger managed nodes.
Figure 34-14. Administration > SNMPv3 Passwords page
When updating SNMPv3 passwords, it is important to ensure that the passwords for each user
are updated on all devices on which that user has been configured. If some devices are updated
and some devices are not, the ZoneRanger will no longer be able to access devices that were not
updated until their SNMPv3 passwords are manually reconfigured.
To ensure that all devices are updated properly, the SNMPv3 password configuration tool walks
the user through a series of steps, performing tests along the way, and provides the option to
revert changes if problems are encountered.
Note: The targets and SNMPv3 users must be configured on the Configuration > SNMP page
Manager tab.
To change SNMPv3 passwords using the configuration tool, perform the following steps from
the Administration > SNMP page SNMPv3 Passwords tab:
Step 1: Click Analyze SNMPv3 Devices.
This tests all managed nodes for which SNMPv3 was configured. The analysis ensures that
all such devices are reachable, and that their SNMPv3 user configuration information is
accessible.
Step 2. Inspect the results of the analysis.
The analysis displays current passwords for each configured user, and the set of users
configured on each device. If any devices were unreachable, or if SNMPv3 user
configuration information was not available for a device, error messages are displayed. If
error messages are reported for any devices, it is recommended that you resolve the
underlying issue and repeat the analysis before proceeding with password updates.
Step 3. Update passwords.
If you decide to proceed, modify the authentication and privacy passwords for various users
as desired and click Update Passwords to apply the changes. You can click Randomize to
generate random passwords for all users, if desired.
Step 4. Inspect results.
ZoneRanger 5.5 User's Guide 126