HP Cisco MDS 9124 Cisco MDS 9000 Family Fabric Manager Configuration Guide - R - Page 377

Chapter 17 Configuring High Availability Switchover Guidelines Send documentation comments to [email protected] Figure 17-1 Modules Screen Shows Current Supervisor Step 2 Select Admin > Reset Switch on the main Device Manager screen. Figure 17-2 Reset Switch Dialog Box Step 3 Click Switch to Standby. Switchover Guidelines Be aware of the following guidelines when performing a 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. Process Restartability Process restartability provides the high availability functionality in Cisco MDS 9000 Family switches. It ensures that process-level failures do not cause system-level failures. It also restarts the failed processes automatically. This vital process functions on infrastructure that is internal to the switch. See the "Displaying System Processes" section on page 68-1. 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. OL-17256-03, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family Fabric Manager Configuration Guide 17-3