Dell S4820T Configuration Manual page 381

Forcing an Stack Unit Failover
To force an Stack unit failover, use the following command.
Use this feature when you are replacing a stack unit and when you are performing a warm upgrade.
• To trigger a stack unit failover.
EXEC Privilege mode
redundancy force-failover stack-unit
Example of the redundancy force-failover stack-unit Command
Dell#redundancy force-failover stack-unit
System configuration has been modified. Save? [yes/no]: yes
Proceed with Stack-unit hot failover [confirm yes/no]:yes
Dell#
Specifying an Auto-Failover Limit
When a non-recoverable fatal error is detected, an automatic failover occurs.
However, Dell Networking OS is configured to auto-failover only three times within any 60 minute
period. You may specify a different auto-failover count.
To re-enable the auto-failover-limit with its default parameters, use the redundancy auto-failover-
limit command without parameters.
• Set a different auto-failover count.
CONFIGURATION mode
redundancy auto-failover-limit
• Re-Enable the auto-failover-limit with its default parameters.
CONFIGURATION mode
redundancy auto-failover-limit
(no parameters)
Disabling Auto-Reboot
To disable auto-reboot, use the following command.
• Prevent a failed stack unit from rebooting after a failover.
CONFIGURATION mode
redundancy disable-auto-reboot
Manually Synchronizing Management and Standby Units
To manually synchronize Management and Standby units at any time, use the following command.
• Manually synchronize Management and Standby units.
EXEC Privilege mode
redundancy synchronize full
High Availability (HA)
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