[c-nsp] PA-E3 in 7204VXR - low bandwith

[Mackinnon, Ian]

UDP doesn't have the tcp synchronisation window, so you don't see the
same limit.

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Jason Lixfeld
> Sent: 15 July 2011 14:31
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] PA-E3 in 7204VXR - low bandwith
> 
> That link is a fantastic read.  Thanks for posting!
> 
> One question I have though - why is a UDP test is better?  Simply
because it's
> inherently made up of small packets?  I'd imagine the UDP iPerf test
doesn't
> try to send large byte UDP packets, but that might be totally
incorrect; I
> haven't used iPerf in some time.
> 
> --
> 
> Sent from my mobile device.
> 
> On 2011-07-15, at 7:26 AM, "Mackinnon, Ian" <Ian.Mackinnon at atos.net>
> wrote:
> 
> > Is that a TCP test on iperf?
> > Try again using UDP, it may be the long fat pipe issue
> > http://bradhedlund.com/2008/12/19/how-to-calculate-tcp-throughput-
> for-
> > lo
> > ng-distance-links/
> >
> > Ian
> >
> >> -----Original Message-----
> >> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> >> bounces at puck.nether.net] On Behalf Of Werner Detter
> >> Sent: 15 July 2011 11:03
> >> To: cisco-nsp at puck.nether.net
> >> Subject: [c-nsp] PA-E3 in 7204VXR - low bandwith
> >>
> >> Hi everybody,
> >>
> >> a customer connected with a 7204VXR (NPE-225), PA-E3 has bandwith-
> >> problems. The maximum outgoing TCP-throughput amounts only
> 15Mbit/s
> >> instead of 34Mbit/s (measured with iperf from the customer-side:
> >>
> >> [  5]  0.0-10.0 sec  17.4 MBytes  14.6 Mbits/sec
> >>
> >> Incoming bandwith is ok:
> >>
> >> [  4]  0.0-10.1 sec  39.1 MBytes  32.3 Mbits/sec
> >>
> >> There are no rate-limits configured, there are no errors on the
> > interfaces
> >> itself, the 7204VXR is pretty underutilized - so everything seems
> >> fine
> > from
> >> that point of view.
> >>
> >> Any Ideas?
> >>
> >> Regards,
> >> Werner
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
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