Redistributing Loopbacks into OSPF area 0
Redistributing loopbacks into Area 0 of OSPF looks to be a common cause of creating a discontiguous area 0 if a link fails.
For example task 3.1 in Vol 2 Lab3 - hub and spoke FR with loopbacks advertised into OSPF area 0. R5 is the hub and R1, R2 and R4 the spokes.
If the link between R1 and R5 or R2 and R5 fails then the loopbacks at either R1 or R2 become disconnected from the OSPF area 0 and a discontiguous area 0 is created.
I accept I would need a virtual link if R2 had say Area 22 behind it.
However, do I need to protect the R1 and R2 LOOPBACKS from possible disconnection from area 0 with virtual links in the lab exam?