failover questions

ALL

 

 

We had a situation where we applied HF4 cumulative patch on standby and at some point both of the ltms went active/active and we had a outage.

 

In order to prevent this to happen again we are thinking of isolating ltm12-2 from the network and apply the patch and disable asm. SO we are thinking of disabling all the interfaces on LTM12-2 including HA interface .

 

 

 

Here is my steps and concerns

 

 

(1) Currently LTM12-2 is active. So we will failover to standby

 

(2) On ltm12-2 change the redundancy state preference to standby.

 

(3) Disable network interfaces on LTM12-2 and HA interface last

 

(4) Reactivate license on LTM12-2 to disable ASM

 

(5) Reboot ltm12-2

 

 

 

(6) Enable HA interface and than other network interfaces on LTM12-2

 

(7) Change the redundancy state preference to NONE on LTM12-2

 

 

our concern is with step 5 and step 6 . Will ltm12-2 become active because its trying to get a heartbeat from ltm12-1 which it won't get because after step 5 there is no connectivity in terms of HA interface to ltm12-1 .