Okay, this task flat out pisses me off. The proctor graded it wrong, saying "You're not allowed to use additional IP addresses, unless otherwise specified. the tunnel should've been IP unnumbered".
Yes, I understand that. It explains quite clearly at the beginning of the lab that additional IP addresses are not to be used.
In mock lab 4, there was a tunnel to be created, and the damn solution guide used an additional IP address! I didn't get that task right, because I was trying to follow the rules... which caused much of my IGP to not work, causing a VERY low score on my lab.
Make up your minds! Can I use additional IP addresses on tunnel interfaces or not? If not, they need to fix mock lab 4 to specifically allow additional IP addresses for that task.
So, for the real lab.. which is it?