Can LTM be used to configure Active and Passive Servers?

I believe so...

 

 

This is the description giving for Priority Activation Groups:

 

Specifies, when enabled, that the system load balances traffic across activated members of their priority group. To enable priority group activation, select Less than from the list, and type the number of members below which the system activates the group. Once you enable priority group activation, you can use options on the Member Properties screen to assign each member to a priority group. The system sends traffic to members in priority-group order.

 

 

I believe that if you select Less than 0, that it will not activate anything in the next group until there are 0 available members of the previous group.

 

 

NOTE: As soon as a member of a Higher Priority Group recovers, traffic will begin flowing back to the Higher Priority Group. (This should happen with new connections. It will not shift the current traffic currently connected to servers in a Lower Priority Group).

 

 

I would suggest testing it to verify (I've never drained one group to zero before transferring the load to a new group. I use it more as an Hot Standby Activation), but it should do what you are wanting. You can see the current load on each member of a pool by going to the following:

 

 

v9.x

 

Overview -> Statistics

 

Statistics Type: Pools

 

 

v10.1.x

 

Overview -> Statistics -> Local Traffic

 

Statistics Type: Pools