I’m beginning to learn a bit about MPLS and have just completed some MPLS OSPF setup. I must say, it seems a bit more complicated than it’s worth. Ok, so by default, even links in the same area are advertised as type 3 summary LSAs. I’m going to work on the sham-link which is supposed to alleviate this particular issue.
regardless, here’s a few tidbits for studying: make sure you can originate a default route from one CE router and have it picked up as a type 5 LSA in other areas. There are a few tricks to get this working.
(correction: they’re type 3 summary LSAs. I originally said they were type 2)