Subject: Re: generic v6-v4 tunnel / packet scheduling issue (was: Re: IPv6 over GRE tunneling?)
To: None <>
From: Gert Doering <>
List: tech-net
Date: 01/29/2005 19:17:16

On Sat, Jan 29, 2005 at 12:14:30AM +0100, Gert Doering wrote:
> Michael v. Elst has done some more tests, and the results seem to point
> at "it's specific to Sparc64, but not to -current" (reproduction on
> NetBSD/i386-1.6.2 and NetBSD/amiga-2.0 was not possible, but as soon
> as one tunnel end is NetBSD/sparc64, timings start being weird).
> I've repeated my tests with Sparc64/2.0.1 (same tunnel setup), and the
> result is the same - ping across the tunnel has weird timings.  

Another data point: tested IPv6-over-GIF and IPv6-over-GRE (my patches)
on NetBSD/i386 2.0.1 today, and neither tunnel protocol exhibits weird 
packet latencies.

So it's definitely a platform dependent problem.

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Gert Doering - Munich, Germany                   
fax: +49-89-35655025