On Tue, 05 Aug 2008 16:12:21 +0100, Invisible wrote:

> Have you ever spent an entire day working on an important problem,
> finally thought you had it solved, and then discovered that actually it
> wasn't solved at all?

Many, many times.  Had a network bridged loop problem a few years ago 
caused (we think - never did find the root cause) by a failure in STP 
between two redundant routers.  The vendor's solution was "unplug the 
cable between the two routers for 20 seconds, wait for the software to re-
route, and then plug it back in".

We "fixed" it the first day (we thought) and at 6 AM the next morning, it 
happened again.

Just you try and do a sniffer trace of a billion packets and find the 
cause.  <sigh>

That was one of the nastiest we had.  We ended up having to redesign the 
system because the vendor couldn't figure it out.

Jim

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