I'm not sure where you got that from. Here it is again: on the DELL D810
side (where I'm running Ethereal) I have a Broadcom NetXtreme 57xx Gigabit
Controller (built into the D810). The NetXtreme does not have an option for
me to select jumbo frames. The other side has a TRENDNet TEG-PCITXR 32-bit
10/100/1000Mb PCMCIA card. The TEG has an option for jumbo frames which I
have enabled. Ethereal will trace with the jumbo frames disabled but not
with them enabled.
Since you say Ethereal does not care if they are jumbo frames or not, then
does anyone know if the DELL D810 with NetXtreme along with Winpcap have a
problem capturing jumbo frames?
Eddy
----- Original Message -----
From: "Guy Harris" <gharris@xxxxxxxxx>
To: "Ethereal user support" <ethereal-users@xxxxxxxxxxxx>
Sent: Friday, March 24, 2006 2:31 PM
Subject: Re: [Ethereal-users] Jumbo Frames
ESQuicksall_Misc wrote:
I believe the NetXtreme (Broadcom) supports jumbo frames because when I
configure it at the TEG side it is faster and Ethereal does not trace
anymore (if the NetXtreme didn't support it then I would expect Ethereal
to continue to trace).
I.e., if Ethereal *does* see jumbo frames, it means the card Ethereal's
using *doesn't* support jumbo frames, but if Ethereal *doesn't* see jumbo
frames, it means the card *does* support them?
That sounds a bit backwards to me....
You'd have to ask Broadcom whether
1) they support jumbo frames
and
2) if they supply jumbo frames to NDIS in the same way that they supply
regular frames to NDIS
as WinPcap attaches to network card drivers via NDIS, and Ethereal does
its capturing on Windows through WinPcap, so whether Ethereal sees packets
depends on:
whether the network adapter sees them;
whether its driver supplies them to WinPcap via NDIS;
whether WinPcap handles the packets supplied to it.
(I.e., this is almost certainly not an Ethereal issue, it's almost
certainly a driver or WinPcap issue. Ethereal has no concept of "jumbo
frames", it just knows Ethereal frames, and doesn't particularly care if
they're bigger than the "proper" maximum size.
Try capturing with WinDump; if it has the same symptoms as Ethereal, it's
a driver or WinPcap issue, and I'd bet on it being a driver issue.)
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