FTP difficulties 4.8R

Graham North graham.north at telus.net
Sun Feb 15 23:21:49 PST 2004

Hi Rob:

Thank you for this help.  Thanks also to all others who replied this
I just came home and it is late so I will pursue all suggestions tomorrow

My gut sense is that it is the nic setup - at first I thought it might be my
router (and maybe it is part of the problem but I have operated 3 different
machines through it and networked them in the past so am starting to get
pretty comfortable with it).  But tomorrow I will start by checking my
cabling carefully - though the same machine if booted into Win98 works
flawlessly so I doubt that the problem is cabling or flaky nic.  The nic is
a 3com 3509 which seems to be well supported.
Auto negotiation - that sounds plausible - esp. since sometimes files do get
through but painfully slowly.  Lowering the MTU setting shouldn't hurt...?

To all - thanks again, I will respond further after playing tomorrow.
Cheers,  Graham/

----- Original Message -----
From: "Rob" <robert at irrelevant.com>
To: "Graham North" <graham.north at telus.net>; <freebsd-questions at freebsd.org>
Sent: Sunday, February 15, 2004 6:15 PM
Subject: Re: FTP difficulties 4.8R

> At 13:32 15/02/2004 -0800, Graham North wrote:
> >[snip]
> >My FreeBSD box on the other hand is a different story.   It is a PII 166
> >[snip]
> >It does go outside and connect, sometimes I can ftp download some small
> >files, most times the process stalls.   I generally need to open a new
> >terminal to kill the process.
> It may be nothing to do with this, but I get similar problems on my DSL
> link with the default MTU setting, 1500, and I can get decidedly better
> performance by reducing it.  Windows has some sort of dynamic adjustment,
> but I've found it's more reliable to set FreeBSD specifically.   Try:
> #ifconfig <network_interface> mtu 1438
> and see if that makes a difference.
> There are optimum values for the mtu, depending on your link parameters,
> and various formulae, but try that first before fiddling more.

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