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Synchronizing Supervisor Modules

The running image is automatically synchronized in the standby supervisor module by the active supervisor module. The boot variables are synchronized during this process.

The standby supervisor module automatically synchronizes its image with the running image on the active supervisor module.

Note The image a supervisor module is booted up from cannot be deleted from bootflash. This is to ensure that the new standby supervisor module ia able to synchronize during the process.

Manual Switchover Guidelines

Be aware of the following guidelines when performing a manual switchover:

• When you manually initiate a switchover, system messages indicate the presence of two supervisor modules.
• A switchover can only be performed when two supervisor modules are functioning in the switch.
• The modules in the chassis are functioning as designed.

Manually Initiating a Switchover

To manually initiate a switchover from an active supervisor module to a standby supervisor module, use the active supervisor module using Device Manager system switchover command. After you enter this command, another switchover process cannot be started on the same switch until a stable standby supervisor module is available.

To ensure that an HA switchover is possible, enter the show system redundancy status command or the show module command. If the command output displays the HA standby state for the standby supervisor module, then the switchover is possible. See "Verifying Switchover Possibilities" for more information.

To perform a switchover using Device Manager, follow these steps:

Step 1 Ensure that an HA switchover is possible by selecting Physical > Modules to verify the presence of multiple modules.

You see the screen shown in Figure 7-1.

Figure 7-1 Modules Screen Shows Current Supervisor

Step 2 In the main Device Manager screen, select Admin > Reset Switch .

Figure 7-2 Reset Switch Dialog Box

Step 3 Click Switch to Standby .

Verifying Switchover Possibilities

This section describes how to verify the status of the switch and the modules before a manual switchover.

• Use the s how system redundancy status command to ensure that the system is ready to accept a switchover.
• Use the show module command to verify the status (and presence) of a module at any time. A sample output of the show module command follows:

The Status column in the output should display an OK status for switching modules and an active or HA-standby status for supervisor modules. If the status is either OK or active, you can continue with your configuration.

• Use the show boot auto-copy command to verify the configuration of the auto-copy feature and if an auto-copy to the standby supervisor module is in progress. Sample outputs of the show boot auto-copy command follow:

Enabling Automatic Copying of Boot Variables

To enable or disable automatic copying of boot variables, follow these steps:

Verifying the Copied Boot Variables

Use the show boot auto-copy command to verify the current state of the copied boot variables. This example output shows that automatic copying is enabled:

This example output shows that automatic copying is disabled:

Use the show boot auto-copy list command to verify what files are being copied. This example output displays the image being copied to the standby supervisor module's bootflash. Once this is successful, the next file will be image2.bin.

Note This command only displays files on the active supervisor module.

This example output displays a typical message when the auto-copy option is disabled or if no files are copied: