Following is the OSPF network..
R4 & R5 are the ABRs for XYZ.
Link connecting (r5 & r4), (r4 & r6), (r5 & r7) are in Area 0(backbone)
Links connecting r4-r1, r1-r2, r2-r3, r3-r5 are in Area XYZ
Do we need any virtual link?
Are there any specific issue if we consider Loadbalancing based on OSPF or run MPLS TE..?