Concept Guide
Example of the show redundancy Command
DellEMC#show redundancy
-- Stack-unit Status --
------------------------------------------------
Mgmt ID: 1
Stack-unit ID: 12
Stack-unit Redundancy Role: Primary
Stack-unit State: Active
Stack-unit SW Version: 1-0(0-4679)
Link to Peer: Up
-- PEER Stack-unit Status --
------------------------------------------------
Stack-unit State: Standby
Peer Stack-unit ID: 5
Stack-unit SW Version: 1-0(0-4679)
-- Stack-unit Redundancy Configuration --
------------------------------------------------
Primary Stack-unit: mgmt-id 1
Auto Data Sync: Full
Failover Type: Hot Failover
Auto reboot Stack-unit: Enabled
Auto failover limit: 3 times in 60 minutes
-- Stack-unit Failover Record --
------------------------------------------------
Failover Count: 0
Last failover timestamp: None
Last failover Reason: None
Last failover type: None
-- Last Data Block Sync Record: --
------------------------------------------------
stack-unit Config: succeeded Feb 23 2016 22:17:18
SSMGR: succeeded Feb 23 2016 22:17:18
Start-up Config: succeeded Feb 23 2016 22:17:18
Runtime Event Log: succeeded Feb 23 2016 22:17:18
Running Config: succeeded Feb 23 2016 22:17:20
ACL Mgr: succeeded Feb 23 2016 22:17:18
LACP: no block sync done
STP: no block sync done
SPAN: no block sync done
CRYPTOMGR: succeeded Feb 23 2016 22:17:18
DellEMC#
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 conguration 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.
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High Availability (HA)