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Date:      Tue, 25 Sep 2012 10:49:15 +0700
From:      Erich Dollansky <erichfreebsdlist@ovitrap.com>
To:        "Rudy (bulk)" <crapsh@monkeybrains.net>
Cc:        freebsd-net <freebsd-net@freebsd.org>, Ryan Stone <rysto32@gmail.com>
Subject:   Re: ping: sendto: No buffer space available
Message-ID:  <20120925104915.6aa98b88@X220.ovitrap.com>
In-Reply-To: <50611FAE.7060809@monkeybrains.net>
References:  <5060884C.3050709@monkeybrains.net> <CAFMmRNzUbiSKhLxiFx-fLrw7LWJ-7h921oaOk-V2ekbSb0TpFg@mail.gmail.com> <50611FAE.7060809@monkeybrains.net>

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Hi,

On Mon, 24 Sep 2012 20:06:22 -0700
"Rudy (bulk)" <crapsh@monkeybrains.net> wrote:

> Checking all the interfaces, there are a lot more drops/Ierrs on
> em2... The igb devices (PCIe card) seem a lot better than the
> Supermicro motherboard em devices.  Is this an on-board vs mb thing,
> or em vs igb thing?
> 
I do not have any experience with this hardware. I only can speak for
iwn, run and the em thing in my machine. I am travelling with this
hardware most of the time I have bought it.

I hardly notice drops on the em interface connection to locally
connected machines.

I see a drop range from 0 to 100% when iwn is connecting to the same AP
while run ranges from 0 to 10% at the same moment of time.

But when I connect via iwn to a different AP and stay within 10m the
drop rate is 0 again.

With other words, it can be a problem caused how the actual hardware
pieces connect to each other. It could be in your case that the PCI
card has simply a better layout. I do not believe that on-board
hardware is generally bad.

Can you change the hardware this machine is talking to?

Erich



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