Installation Guide
6 4027869 Rev A
Configuring the Chassis
SNMP Write Lock Switch
There is an SNMP Write Lock switch located on the chassis. Check the specific
chassis manual for the location. The SNMP Write Lock switch prevents a new
Management Module from re-configuring the application module settings (e.g., the
status of features such as LinkLoss, FiberAlert, Force mode, etc.) made via SNMP on
any previous Management Module(s).
Note: Leave this switch in the NORMAL position during day-to-day operation. The
LOCKED position should only be used when changing the SNMP Management
Module.
As stated, SNMP Management Modules can be removed and replaced as necessary.
A saved PROM file can be downloaded to the second SNMP Management Module
to retain configuration settings.
Make sure the SNMP Write Lock switch is set to the LOCKED position. The PROM
file should be saved periodically in case there is a need to replace the SNMP
Management Module.
Saving the existing PROM creates a back-up file which can be used in the event that
a unit or PROM update fails. It is recommended that the PROM be saved after the
user is satisfied with his current configuration settings, as saving the PROM at this
point allows them to recover their configurations as well.
Saving the PROM File
1 Open a session in iConfig with a device you want to administer.
2 Choose the Administration tab.
3 Click the Save PROM File button.
4 The Save as PROM dialog box appears.
5 Choose a folder and then select the filename you wish to save.
Note: .BIN is the default extension.
6 Click the Save button to save, the file is saved.
7 Add entries to the Notes box, if desired; then click OK. If you do not wish to
enter Notes, click Close.
8 Click OK to close Succeeded dialog box. (Prom Save was successful.)
If the Management Module is removed with the SNMP Write Lock switch set to
NORMAL, all module revert to their hardware settings by default. For any module
with on-board logic, refer to its manual for details. Hardware settings should be
configured to match those made via SNMP. Always reconfigure application
modules when moving them from one chassis’ slot to another.
Using the SNMP Write Lock Switch
1 Ensure the SNMP Write Lock switch is set to NORMAL.