4.2 OSPF P-to-Mpt alternative
I accomplished 4.2 by going to the relevant neighbours and hard coding the port speeds where R1 was 100 and R3 was 10. Since the interface bounced but came back working I left it at this. SW1 used this manipulation to base its calculations on and chose R1 as the primary path.
A couple of checks in the OSPF database also confirmed the link cost as 10 and 1 so I left it at this.
Is there any reason to go to the trouble of specifying the link types as p-t-mpt? (other than to know all possible methods of achieving it)