White Papers

Table Of Contents
Synchronization between Management and Standby Units
Data between the Management and Standby units is synchronized immediately after bootup.
After the Management and Standby units have done an initial full synchronization (block sync), Dell EMC Networking OS only
updates changed data (incremental sync). The data that is synchronized consists of configuration data, operational data, state
and status, and statistics depending on the Dell EMC Networking OS version.
Forcing a Stack Unit Failover
To force a 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
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 EMC Networking OS is configured to auto-failover only three times within any 60 minute period and you cannot
change that.
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)
341