Cisco ASA Firewall Active / Standby Failover

Rene

the set up is like this -
2 stacked 3850’s which are connected to ASA’s running active/standby . I have attached 2 inside interfaces via eigrp and 2 outside interfaces connected by " route outside ****** "
is there any need for the standby firewall to have physical connections to the switch stack ? if so will they need IP’s assigned to them ?

Also when the standby ASA takes over there are no routes in the routing table ?

also I have configured the inside interface on the active ASA with the standby IP of the interface which its connected to on the switch stack

failover lan unit primary / secondry
failover lan interface GigabitEthernet 0/6
failover link FAILOVER GigabitEthernet 0/6
failover interface ip FAILOVER 126.x x x 255.255.255.252 standby 126.x x x 
failover

monitor interface inside

ERROR before and after interface monitoring - 
This host: Primary – Active
 Other host: Secondary – Standby Ready – before interface monitoring

This host: Primary – Active
 Other host: Secondary – Failed – after interface monitoring

Thanks Rene , appreciate your time