Hello @NIC_Haryana ,
>> We want reverse traffic to R1 form higher bandwidth.
move R1 to HQ router 34 Mbps link from area x.x.x.x to area 0.0.0.0 on both ends
move link between R1 and R2 in area x.x.x.x in both ends from area y.y.y.y.
>>
R1--34Mb--->Head Office (area x.x.x.x)
R1---1G--->R2 (area y.y.y.y)
R2--10G --->Head office (area 0.0.0.0)
Default traffic is being forwarded from R1 --->R2
if you refer to route to 0.0.0.0/0 LSA type 5 it looks for the best path to ASBR without using the route types we have seen this in a recent thread.
The return traffic will look at route type being an OSPF specific internal router so you need the two changes described above in order to use the 10GE in area 0 as the return path
You need to compare an O IA route to another O IA route.
Hope to help
Giuseppe