Introduction

The M580 BMEH58•040(S) Hot Standby CPU DTMs include a Hot Standby Synchronization page where you can synchronize the storage of configuration (.prm) files for distributed equipment in the primary and standby CPUs. Distributed equipment configuration files stored in Hot Standby CPUs are used by the fast device replacement (FDR) service.

Use this page to:

  • View the synchronization status of distributed equipment configuration files stored by the Hot Standby system CPUs.

  • Stop synchronization.

  • Force a manual synchronization.

The standby CPU synchronizes with the primary CPU by pulling data every 10 seconds to verify that the data in the standby has been updated in the primary. If the standby unsuccessfully synchronizes with the primary, it continues polling the primary every 10 seconds.

If the data in the standby and primary PACs are different, an application mismatch condition exists. In this case, synchronization stops and a synchronization error is detected in the standby CPU.

NOTE:

  • When the standby CPU is offline, it does not synchronize.

  • If you disable the TFTP service, Hot Standby synchronization cannot be performed, because this function is based on TFTP.

Accessing the Hot Standby Synchronization Page

To access the CPU Hot Standby Synchronization page, follow these steps:

Step

Action

1

In Control Expert, open the DTM Browser (Tools > DTM Browser).

2

Right-click the CPU in the DTM Browser.

3

Select Connect.

4

Right-click the CPU in the DTM Browser.

5

Select Device menu > Diagnosis.

6

Click the Hot Standby Synchronization tab.

Using the Hot Standby Synchronization Page

The Hot Standby Synchronization page presents the following parameters and controls:

Parameter

Description

Refresh Every 500ms

Select this to display synchronization data in this page, and refresh displayed data every 500ms.

Status area:

Synchronizing

  • True: Synchronization is executing.

  • False: Synchronization is not executing.

Synchronized

  • True: Data in both primary and standby are synchronized.

  • False: Data in both primary and standby are not synchronized.

Error Status

  • Green: No synchronization error is detected.

  • Red: A synchronization error has been detected.

Manual Synchronization > Stop Synchronization area:

Stop Synchronization Service

Select this then click Send to stop the synchronization service.

NOTE: To re-start the synchronization service, select one of the Force Manual Synchronization options (below), then click Send.

Manual Synchronization > Force Manual Synchronization area:

Copy Files from Standby to Primary

Select this then click Send to push DIO device configuration (.prm) files from the standby CPU to the primary.

Copy Files from Primary to Standby

Select this then click Send to pull DIO device configuration (.prm) files from the primary CPU to the standby.

Clear Files in Primary

Select this then click Send to delete the DIO device configuration (.prm) files from the primary. If synchronization is enabled, the standby CPU synchronizes with the primary and any DIO device configuration files in the standby are also deleted.