This article is in multiple parts and it is an excellent read. If you are having any issues with OSPF over frame relay or just want to get a quick review in this is a must read. Arden even has configurations up on the articles that you can work through. OSPF can drive you mad on frame relay. This can help. I know at one point last year I grew tired of OSPF on our backup frame relay network and migrated over to EIGRP!

“Knowing the OSPF Network Types and how they work with different frame relay topologies is one of those things that you should know inside out if you are attempting the CCIE lab. In this next series of articles we will be looking at the 5 OSPF network as well as how and when to use them in conjunction with a frame relay hub and spoke topology…”

Full article here

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