Task 3.2 OSPFv3
The description is not precise, the PPP link should also be in OSPFv3 area 123 according to solution.
Also on the lab manual, lo100 on R3 is advertised into RIPng, while on the solution, not RIGng and redistribution is mentioned.
Should be advertise lo100 on R3 to RIPng, redistribute RIPng to OSPFv3 with include connected. Then use cost to do the TE.