[iyonix-support] Re: Does MTU setting work?
- From: Evan Clark <evan@xxxxxxxxxxxxxxxxxxxx>
- To: iyonix-support@xxxxxxxxxxxxx
- Date: Sat, 20 Jun 2009 23:16:39 +0100
In article <c1708e6e50.davehigton@xxxxxxxxxxxxx>,
Dave Higton <davehigton@xxxxxxxxxxxxx> wrote:
> In message <506e7024abevan@xxxxxxxxxxxxxxxxxxxx>
> Evan Clark <evan@xxxxxxxxxxxxxxxxxxxx> wrote:
> > > *ifconfig ek0 mtu 1492
> >
> > Just tried this and interest access ceased. I was sure I'd done this
> > before without any problem, so reset the machine and tried again. This
> > time internet access is OK. I've just uploaded, downloaded and deleted
> > from the server, a 3968 byte file via FTP with no errors. I've no idea
> > why changing the setting only works sometimes.
> Did you reissue the command after the reset? The MTU is reset here.
> 5.14 softload.
Yes, I set mtu to 1492 immediately after the reset.
I then did a Wireshark capture on the above process. The 3968 bytes was
split into three packets of 1360, 1360 and 1248 bytes, both on the upload
and download.
The irony is that I had to reset the mtu to 1500 before I could transfer
the captured data to the Linux box for analysis.
I don't pretend to understand what is going on.
Evan.
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