File transfer speed between Hong Kong and Johannesburg, South Africa

Nick Hilliard nick at foobar.org
Thu Jul 11 18:04:04 UTC 2013


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 at satelliteintelligencegroup.com> wrote:
> 
>>  Look at your MTU on links..
>>
>>
>>  Sent from my Mobile Device.
>>
>>
>>
>> -------- Original message --------
>> From: Luan Nguyen <luan20176 at gmail.com>
>> Date: 07/11/2013 10:16 AM (GMT-08:00)
>> To: nanog at 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 at 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 at gmail.com>
>>> To: nanog at 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
>>>
>>>
>>





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