Re: File transfer speed between Hong Kong and Johannesburg, South Africa

[Nick Hilliard <nick () foobar org>]

On 11/07/2013 18:51, Luan Nguyen wrote:
> Is there a tool to do that end to end? Path MTU discovery tool?

yes: scamper

> We use GRE/IPSEC with a WS-IPSEC 3 setting the tunnel to MTU 1400 with MSS
> = 1360 both end.

if you're using cisco kit for the ipsec tunnel, I'd recommend the following:

crypto ipsec fragmentation before-encryption
crypto ipsec df-bit clear

if you handle the fragmentation properly, 1360 should be ok for the mtu.

Nick

> The steelhead set to 1400 MTU as well since I was told the steelhead will
> set the DF bit.
> Steelhead log doesn't show timeout, unable to connect/ retry or anything to
> suggest drop packets though.
>
> Thanks.
>
> Regards,
>
> -Luan
>
>
> On Thu, Jul 11, 2013 at 1:36 PM, Warren Bailey <
> wbailey () satelliteintelligencegroup com> wrote:
>
> >  Look at your MTU on links..
> >
> >
> >  Sent from my Mobile Device.
> >
> >
> >
> > -------- Original message --------
> > From: Luan Nguyen <luan20176 () gmail com>
> > Date: 07/11/2013 10:16 AM (GMT-08:00)
> > To: nanog () nanog org
> > Subject: Re: File transfer speed between Hong Kong and Johannesburg, South
> > Africa
> >
> >
> >  Thanks guys.
> >
> > We do have Riverbed Steelhead appliances at both end.
> > According to calculation, maximum throughput can be attained is ~330KB/sec.
> > With the Riverbed "cold" transfer, we should get ~600KB/sec. But I can only
> > get ~250KB/sec with the Steelhead doing its stuff for 500M file so plenty
> > of time for whatever to kick in.  Iperf and netperf show great results
> > though.
> > I guess I will be sampling results hourly for comparison.
> >
> > Regards,
> >
> > -Luan
> >
> >
> > On Thu, Jul 11, 2013 at 11:37 AM, Joe Loiacono <jloiacon () csc com> wrote:
> >
> > > The maximum you can expect is:
> > >
> > > Rate < (MSS/RTT)*(1 / sqrt(p)) where p is the probability of packet loss.
> > >
> > > Credit: Mathis, Semke, Mahdavi & Ott in Computer Communication Review,
> > > 27(3), July 1997, titled The macroscopic behavior of the TCP congestion
> > > avoidance algorithm.  (
> > http://www.infoblox.com/community/blog/tcp-performance-and-mathis-equation
> > )
> > > Joe
> > >
> > > [image: Inactive hide details for Luan Nguyen ---07/11/2013 10:06:19
> > > AM---Hello folks, Does anyone know what's the average speed for wi]Luan
> > > Nguyen ---07/11/2013 10:06:19 AM---Hello folks, Does anyone know what's
> > the
> > > average speed for windows file transferring
> > >
> > > From: Luan Nguyen <luan20176 () gmail com>
> > > To: nanog () nanog org
> > > Date: 07/11/2013 10:06 AM
> > > Subject: File transfer speed between Hong Kong and Johannesburg, South
> > > Africa
> > > ------------------------------
> >
> > > Hello folks,
> > >
> > > Does anyone know what's the average speed for windows file transferring
> > > (SMB2) between Hong Kong and Johannesburg?
> > > Any guide on how to calculate/estimate this?
> > >
> > > Thanks.
> > >
> > > Regards,
> > >
> > > -Luan