RE: TCP Transfers slowing down
From: Jason Coene (jcoene_at_gotfrag.com)
Date: 08/15/05
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To: "'Mike Tancsa'" <mike@sentex.net>, <freebsd-performance@freebsd.org> Date: Mon, 15 Aug 2005 14:45:27 -0400
Hi Mike,
Sorry, I should have clarified in my original e-mail. On the local network,
transmissions work great, I can clear 6Mbyte/sec between 2 FreeBSD servers
using eth0 and the switch. The problem occurs when going upstream.
The reason why I'm thinking that this has to be something to do with a
change in FreeBSD is circumstantial:
- This problem didn't occur on 5.2-RELEASE (with no infrastructure changes)
- An OpenBSD firewall (exact hardware, exact interface and switchport
configuration) doesn't have the problem.
- A FreeBSD 5.2.1-RELEASE machine (similar hardware, eth0 on the outside,
same switch and interface configuration) doesn't have the problem.
Do you know if there were any changes between 5.2 and 5.4 that may have an
impact on this?
Thanks,
Jason
> -----Original Message-----
> From: owner-freebsd-performance@freebsd.org [mailto:owner-freebsd-
> performance@freebsd.org] On Behalf Of Mike Tancsa
> Sent: Monday, August 15, 2005 7:42 AM
> To: Jason Coene; freebsd-performance@freebsd.org
> Subject: RE: TCP Transfers slowing down
>
> At 01:36 AM 15/08/2005, Jason Coene wrote:
> >Thanks for the response. I've attached what you requested as a text file
> in
> >case the following gets garbled by Outlook.
>
> Hi
> It all looks nice and clean. Is there a slow down between
> the boxes ? I dont see any errors to speak of. One thing you might
> try is to set the switch port to auto and the nic to auto. In the
> past there has been problems with flow control between the fxp and
> some switches. Putting it to auto should take care of that, but I
> dont think that is an issue. Still, worth a try. Also verify that
> its not some coincidental issue with your upstream by doing some
> transfer tests between each of the machines.
>
> ---Mike
>
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