Refer to the exhibit. The ISP router is fully configured for customer A and customer B using the VRFLite feature. What is the minimum configuration required for customer A to communicate between routers A1 and A2?
A. A1:
interface fa0/0
description To->ISP
ip vrf forwarding A
ip add 172.31.100.1 255.255.255.0
no shut
!
router ospf 100
net 172.31.100.1 0.0.0.255 area 0
A2:
interface fa0/0
description To->ISP
ip vrf forwarding A
ip add 172.31.200.1 255.255.255.0
no shut
!
router ospf 100
net 172.31.200.1 0.0.0.255 area 0
B. A1:
interface fa0/0
description To->ISP
ip add 172.31.200.1 255.255.255.0
no shut
!
router ospf 100
net 172.31.200.1 0.0.0.255 area 0
A2:
interface fa0/0
description To->ISP
ip add 172.31.100.1 255.255.255.0
no shut
router ospf 100
net 172.31.100.1 0.0.0.255 area 0
C. A1:
interface fa0/0
description To->ISP
ip vrf forwarding A
ip add 172.31.100.1 255.255.255.0
no shut
router ospf 100 vrf A
net 172.31.100.1 0.0.0.255 area 0
A2:
interface fa0/0
description To->ISP
ip vrf forwarding A
ip add 172.31.200.1 255.255.255.0
no shut
router ospf 100 vrf A
net 172.31.200.1 0.0.0.255 area 0
D. A1:
interface fa0/0
description To->ISP
ip add 172.31.100.1 255.255.255.0
no shut
router ospf 100
net 172.31.100.1 0.0.0.255 area 0
A2:
interface fa0/0
description To->ISP
ip add 172.31.200.1 255.255.255.0
no shut
router ospf 100
net 172.31.200.1 0.0.0.255 area 0
