Hi,
I haven't worked with them myself. Wikipedia is your friend here:
http://en.wikipedia.org/wiki/Pause_frame
Thanx,
Jaap
Jake Peavy wrote:
Thanks Jaap,
I should probably start off by saying that I'm not sure I understand
flow control completely; I'm a little out of my depth.
I've also tried capturing off the full duplex 10/100 switch, but don't
see them there either.
Should I just be able to look for eth.type == 0x8808 in order to see
flow control information or do I need to look inside the Frame/Ethernet
headers?
I did look at the sample capture:
http://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=get&target=Ethernet_Pause_Frame.cap
<http://wiki.wireshark.org/SampleCaptures?action=AttachFile&do=get&target=Ethernet_Pause_Frame.cap>
but I'm not sure if that's what to expect. If it is, and if they're
there, I'm definitely not seeing them.
Thanks again,
-jp
On 12/4/08, *Jaap Keuter* <jaap.keuter@xxxxxxxxx
<mailto:jaap.keuter@xxxxxxxxx>> wrote:
Hi Jake,
Sticking in a hub will make it half duplex, so full duplex rate
control is out
of the question. Better get a passive tap.
Thanx,
Jaap
Jake Peavy wrote:
> Hello all,
>
> I believe we're running into an issue caused by one device
sending PAUSE
> frames onto the wire and impairing the bandwidth delivered by the
> upstream switch.
>
> I have placed a 10BaseT hub (old school) in the datapath and
attempted
> to capture this information using a linux host running Wireshark,
but I
> do not see any flow control information.
>
> Is there anything I need to do to the ethernet driver/interface
in order
> to capture this traffic using Wireshark?
