Events that cause a switchover

There are a number of events that can cause the active management module to switchover to the standby management module when management module redundancy is enabled:

• The active management module crashes

• The standby management module does not receive a heartbeat from the active management module

• The redundancy switchover command is executed

• The MM Reset button on the active management module is pressed

• The MM Shutdown button on the active management module is pressed

• The boot or boot active command is executed

• The reload command is executed

• There is a hardware failure on the active management module

In all of these cases, the standby management module takes control and performs the actual switchover. The reason for the switchover is entered in log messages on the newly active management module and to any configured Syslog servers.