Users Guide

Platform Failover Type Failover Behavior
running conguration is synchronized at
runtime so it does not need to be
reapplied during failover.
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 Networking OS only updates
changed data (incremental sync). The data that is synchronized consists of conguration data, operational data, state and status,
and statistics depending on the Dell Networking OS version.
Conguring RPM Redundancy
To select a primary RPM, use the following command. The RPM in slot 0 is the primary RPM by default.
• Manually select the primary RPM.
CONFIGURATION mode
redundancy primary
Example of Viewing RPM Redundancy Conguration
Dell#show running-config redundancy
!
redundancy auto-failover-limit count 3 period 60
redundancy auto-synchronize full
redundancy primary rpm0
Dell#
To view which RPM is the primary, use the show running-config redundancy command from EXEC Privilege mode, as
shown in the example in the Forcing an RPM Failover.
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 congured to auto-failover only three times within any 60 minute period. You may specify a dierent
auto-failover count.
To re-enable the auto-failover-limit with its default parameters, use the redundancy auto-failover-limit command
without parameters.
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High Availability (HA)