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Alexander_Georg's avatar
Alexander_Georg
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Jul 09, 2013

What happens on failover when cluster not in sync?

Hi,

 

I am wondering how the device will act in case of:

 

a) active-passive configuration is enabled

 

b) configuration is not in sync

 

c) active device fails

 

Will the standby unit become active and process traffic to the "last known configuration"?

 

Kind regards,

 

Alex

 

3 Replies

  • Hi Alex, your understanding is correct. The standby box will become active and begin to process traffic with its current configuration. Sync status is totally independent of failover.
  • Hi Alexander,

     

     

    Yes, the config that is not in sync will not be available on the standby device

     

    Once failover happens the standby will resume the active role with last synchronized configuration, (other that the unsynchronized config all will work fine)

     

     

    However in such situation to get the lost config on the Standby (now Active), you can do a config pull

     

    GUI - System ›› High Availability : ConfigSync >> (Synchronize from peer)

     

     

    CLI

     

    v10.x - b config sync pull

     

    V11.x - run cm config-sync from-group DEVICEGROUPNAME

     

     

    Thanks

     

    Ajmal