From: Marc (tan@dia.janis.or.jp)
Date: Thu Apr 24 2003 - 20:28:27 GMT-3
One thing I found useful to understand authentication better was to use
debug and confirm myself that null/text/md5 authentication was being used or
not, especially for virtual links. Page 496 of Doyle vol 1 has an
explanation of what each field means. I only used this debug a few times,
but it stuck with me and came in useful in my first lab attempt.
debug ip ospf packets
The key things to look for are Area number and RID. This will tell you if
the output is for a virtual link. Then look for AuType which will confirm
what level of authentication is being used.
Marc
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