Anyone can explain about relation of "Pool" and "Trunk" with HA Group?

Eesun, I'm not sure exactly the question, specifically re relation of pool and trunk.

Anyway, a ha group calculates a score and the way to build up and monitor the score is to use either pools, trunks or both. Depending on the up/down status of the pool members or trunk members (interfaces) then a bigip will achieve a score. This is compared to its peer and dictates whether failover occurs.

Does this help?

Note best practice is not too use pools by themselves so either use trunks only to calculate a score or pool + trunk.

Hope this helps.

The two above answers are very good! Thank you