Kindly go through the attached picture.In that i have some questions to ask:
1.After VL is established between R2 and R3 through A1,whether router R1 uses R2 to reach Area 1 or R3 to reach Area 1.
2.What happens if all interfaces on R2 is disabled, whether R1 can reach Area 1
and Area 0?
3.What happens if all interfaces on R3 is disabled, whether R1 can reach Area 0 and Area 1 ?