Mailing List Archive: addendum to syslinux/ tftp-hpa docs

addendum to syslinux/ tftp-hpa docs

Feb 28, 2002, 11:26 AM

Post #1 of 4 (1599 views)

After a few days of troubleshooting, we finally determined why we were
having problems. It seems as though the tftp-hpa daemon requires the
MTU of the interface it's running on to be >= 1500. We had the MTU set
at 1400 (don't ask why) and the PXE client was receiving fragmented
packets and failing. As soon as we set it to over 1500, it worked fine.

hpa,

Could you please update your syslinux/pxelinux and/or tftp-hpa docs so
they reflect this requirement?

Thanks,

James Martin

addendum to syslinux/ tftp-hpa docs [ In reply to ]

hpa at zytor

Feb 28, 2002, 2:45 PM

Post #2 of 4 (1542 views)

Permalink

James S. Martin wrote:

> After a few days of troubleshooting, we finally determined why we were
> having problems. It seems as though the tftp-hpa daemon requires the
> MTU of the interface it's running on to be >= 1500. We had the MTU set
> at 1400 (don't ask why) and the PXE client was receiving fragmented
> packets and failing. As soon as we set it to over 1500, it worked fine.
>
> hpa,
>
> Could you please update your syslinux/pxelinux and/or tftp-hpa docs so
> they reflect this requirement?
>

Hmm... the problem is that what you're seeing isn't the tftp-hpa daemon
doing anything wrong, what you're seeing is a bug in your PXE stack. I'll
add it to the "broken hardware info" page.

-hpa

addendum to syslinux/ tftp-hpa docs [ In reply to ]

John.Cagle at COMPAQ

Feb 28, 2002, 3:13 PM

Post #3 of 4 (1540 views)

Permalink

Peter,

Is the problem that a PXE client, running on Ethernet, should not assume
that the MTU is at least 1500? Do you think that it probably doesn't
support IP segment reassembly?

Thanks,
John

> -----Original Message-----
> From: H. Peter Anvin [mailto:hpa@zytor.com]
> Sent: Thursday, February 28, 2002 4:46 PM
> To: James S. Martin
> Cc: syslinux@zytor.com
> Subject: Re: [syslinux] addendum to syslinux/ tftp-hpa docs
>
>
> James S. Martin wrote:
>
> > After a few days of troubleshooting, we finally determined
> why we were
> > having problems. It seems as though the tftp-hpa daemon
> requires the
> > MTU of the interface it's running on to be >= 1500. We had
> the MTU set
> > at 1400 (don't ask why) and the PXE client was receiving fragmented
> > packets and failing. As soon as we set it to over 1500, it
> worked fine.
> >
> > hpa,
> >
> > Could you please update your syslinux/pxelinux and/or
> tftp-hpa docs so
> > they reflect this requirement?
> >
>
>
> Hmm... the problem is that what you're seeing isn't the
> tftp-hpa daemon
> doing anything wrong, what you're seeing is a bug in your PXE
> stack. I'll
> add it to the "broken hardware info" page.
>
> -hpa

addendum to syslinux/ tftp-hpa docs [ In reply to ]

hpa at zytor

Feb 28, 2002, 3:23 PM

Post #4 of 4 (1528 views)

Permalink

Cagle, John wrote:

> Peter,
>
> Is the problem that a PXE client, running on Ethernet, should not assume
> that the MTU is at least 1500? Do you think that it probably doesn't
> support IP segment reassembly?
>

It's probably either not supporting reassembly, or more likely, completely
buggy in that area.

-hpa