[164412] in North American Network Operators' Group
Re: File transfer speed between Hong Kong and Johannesburg, South
daemon@ATHENA.MIT.EDU (Nick Hilliard)
Thu Jul 11 14:04:16 2013
X-Envelope-To: nanog@nanog.org
Date: Thu, 11 Jul 2013 19:04:04 +0100
From: Nick Hilliard <nick@foobar.org>
To: Luan Nguyen <luan20176@gmail.com>
In-Reply-To: <CABX54rf748tK2=khLhdRO_tFvRPjy+5j4v6QkLJRgv84hgYBkw@mail.gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.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
>>>
>>>
>>
