Since we were talking a little about OSPF today, I'd like to pose a
question. When it comes to Path Types, Cisco uses E2's by default rather
than E1's. Can someone tell me why? If E1's include the cost of the path to
the ASBR that is distributing that route information into the autonomous
system why wouldn't we want to know the entire cost of the path? Not knowing
the internal path can lead to you taking a higher cost internal path if that
path has a lower external cost. Doyle uses an example in his TCP/IP book (p.
489) that shows exactly such a situation occurring. Why would Cisco default
to E2's if that could lead to sub optimal routing?

Just curious,
Chris

Christopher A. Kane
CCNP/CCDP
Technical Support - Solution Center/Hilliard
WorldCom




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