Okay so I set up a SPAN session on our CatOs 6500, and everything was fine for like 12 hours.
Then suddenly in the middle of the night the helpdesk calls and says the website isnt reachable from the inside. (behind an f5 in the DMZ) Not even sort of directly connected to the old core switch with the SPAN on it.
So the other network guy killed the span, since that was the only change made that day and things started working.
That makes no sense at all. Has anyone ever heard of a span affecting connectivity?