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Re: comcast routing issue question
- From: Jordan Hazen
- Date: Thu Nov 30 01:40:35 2006
On Thu, Nov 30, 2006 at 12:28:30AM -0500, Jim Popovitch wrote:
>
> On Thu, 2006-11-30 at 00:06 -0500, Jim Popovitch wrote:
> > Question: What could cause the first trace below to succeed, but the
> > second trace to fail?
> >
[snip]
> > Taking the 69.61.40.33/28 subnet a bit further, .36 drops at 68.86.84.70
> > but .37 - .39 make it. .40 drops at 68.86.84.70, but .41 makes it.
> >
> > Crazy.
>
> Btw, the problem has now been resolved, however I'm still curious as to
> what scenario could have caused that.
Perhaps CEF-style load balancing over multiple paths, with one of them
down and not properly failing over? Per-flow balancing would decide
which path to use based on source & target IP.
> -Jim P.
>
--
Jordan.
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