Forum Discussion

RecontuerSG_258's avatar
RecontuerSG_258
Historic F5 Account
Jun 15, 2017

Priority Boot to Primary Device over Secondary Device

Hi all,

 

some network people were asking if they can "hardcode" a priority to F5 devices running in active/passive pair. For example, no matter who is the active box before a complete power failure, both boxes will boot up at the same time when power restores.

 

If secondary device booted up faster than primary device, can F5 device "wait" to allow primary device to boot up and become active?

 

In my opinion, whoever that boots up first will see that its peer device is not up and thus will take on the Active role.

 

Question: Does priority booting exist in F5? Why is this behavior not recommended?

 

application delivery
BIG-IP
ha
high availability
LTM
power failure
priority boot
  • jaikumar_f5's avatar
    jaikumar_f5
    Icon for MVP rankMVP
    Jun 16, 2017

    You may wanna refer Controlling failback for active/standby mode and Article

     

    Like you said, If A box boots up fast and B bit slower, A would be Active.

     

    B would not become Active until there's a failover.

     

    If your requirement is to have the B box prioritize when both the LTM's are UP, you may change the failover.forceactive db value to active.