Active standby pool members

Its not an answer for your question rather a question again.

My Requirements, 1. Primary and standby, all traffic goes to primary. 2. When primary fails, I want my existing connections also switch to standby. 2. When primary fails then later comes back, I want my traffic (new and existing) go back to primary. 3. When the both nodes are down, I want all the existing and new connections should drop.

Your configuration is almost matching for my requirement, could you share, which configuration should I have. Thanks in advance.