comcast routing issue question
jnh at aug.com
Thu Nov 30 06:23:41 UTC 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?
> > Taking the 126.96.36.199/28 subnet a bit further, .36 drops at 188.8.131.52
> > but .37 - .39 make it. .40 drops at 184.108.40.206, 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.
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