Refer to the exhibit. The ISP router is fully configured for customer A and customer B using the VRF-Lite feature. What is the minimum configuration required for customer A to communicate between routers A1 and A2?
A1 and A2 routers do not know they belong to VRF A. The two
interfaces of ISP (which are connected to A1 & A2) should be configured like this (we only show the
configure of one interface):
ISP router:
interface g0/0
description ISP->To_CustomerA
ip vrf forwarding A
ip address 172.31.100.2 255.255.255.0
router ospf 100 vrf A
network 172.31.200.2 0.0.0.255 area 0
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