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 < > wbai...@satelliteintelligencegroup.com> wrote: > >> Look at your MTU on links.. >> >> >> Sent from my Mobile Device. >> >> >> >> -------- Original message -------- >> From: Luan Nguyen <luan20...@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 <jloia...@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 <luan20...@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 >>> >>> >>
