The load balancer will expire the connection immediately when a packet arrives and its destination server is not available.

With IPVS, if this sysctl variable is set to 0, the load balancer will silently drop packets when its destination server is not available.
If this variable is enabled, the load balancer will expire the connection immediately when a packet arrives and its destination server is not available.

A.
expire_nodest_conn

B.
expire_curr_conn

C.
drop_entry

D.
drop_curr_conn