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TechT's avatar
TechT
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Apr 01, 2015

Active F5 device

We know we can configure LTM to be in Active/Standby or Active/Active mode.   My questions are : 1 ) Anyone knows how LTM determine the Unit is going to be Active of its own when we connected to ...
active
application delivery
LTM
Hannes_Rapp's avatar
Hannes_Rapp
Icon for Nimbostratus rankNimbostratus
Apr 01, 2015

Are you using F5 BigIP v11.x platform (not Viprion) ?

 

  1. The device with the highest management IP address will be selected as the active device by default, unless the peering unit is explicitly configured in forced offline state.
  2. If you force your active unit to standby mode, it will retain it's standby status, until next system failure of the active unit. This behavior can be changed by enabling failback configuration - not recommended.

While you are doing any activities which will break the active-standby cluster, I recommend issuing the forced offline status on your standby unit. Alternatively, just disable all network interfaces besides the mgmt interface. You'll know you can't screw things up this way :).