nanog mailing list archives
Re: comcast routing issue question
From: Jordan Hazen <jnh () aug com>
Date: Thu, 30 Nov 2006 01:23:41 -0500
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.
Current thread:
- comcast routing issue question Jim Popovitch (Nov 29)
- Re: comcast routing issue question Jim Popovitch (Nov 29)
- Re: comcast routing issue question Jordan Hazen (Nov 29)
- Re: comcast routing issue question Matthew Petach (Nov 30)
- Re: comcast routing issue question Jeremy Chadwick (Nov 29)
- Re: comcast routing issue question Jamie Dahl (Nov 29)
- Re: comcast routing issue question Adrian Chadd (Nov 29)
- Re: comcast routing issue question Jim Popovitch (Nov 29)