I need to give an example in order to understand Passive interface:
Let s say I have a router R2 which is an ABR between OSPF are 0 and area 3 and EIGRP AS 10.
it has S0/1 connecting to area 0 and E0 connecting to area 3 and S0/2 connecting to EIGRP AS 10
now if I configure S0/1 and E0 as passive interfaces , then area 0 and area 3 will not get any routes from EIGRP 10 and the other way around I guess will also be true,EIGRP10 will not get any OSPF routes from area 0 and area 3.
My question is if later, I will try to redistribute OSPF into EIGRP 10 and EIGRP 10 into Area 0 and Area 3,will still be possible even if the afore-mentioned interfaces are configured as passive ?