Can LTM be used to configure Active and Passive Servers?

There is another available option that is close to what you are requestion using the Priority Activation Groups.

 

 

It will keep a specified number of servers available and on-line (basically keeping your load distributed rather than continually loading it onto the last server and slowing down performance until it either fails, is taken off-line, or the other active servers become available again).

 

 

Available option on the Pool settings.

 

 

Under Load Balancing the "Priority Group Activation" to "Less than..." and then select the number of members you always want active.

 

 

Then go to each node and change the Priority Group for each server.

 

 

Example:

 

If I set the Priority Activation Group to Less than 3 the Load Balancer will always keep 3 servers available. (Higher the Activation Group the higher the preference)

 

 

10.10.10.1 - Priority Activation Group 3

 

10.10.10.2 - Priority Activation Group 3

 

10.10.10.3 - Priority Activation Group 3

 

 

10.10.10.4 - Priority Activation Group 2

 

10.10.10.5 - Priority Activation Group 2

 

10.10.10.6 - Priority Activation Group 2

 

 

10.10.10.7 - Priority Activation Group 1

 

10.10.10.8 - Priority Activation Group 1

 

10.10.10.9 - Priority Activation Group 1

 

 

If one server in Group 3 dies, then a server from Group 2 will be begin to take traffic.

 

If two servers in Group 3 die, then two servers in Group 2 will be begin to take traffic.

 

and so on....

 

 

This is basically an Active / Standby ability.