speed vpn issue?

[123jorgeg]

I´m not sure if i have a problem  with vpn. I have 2 asa 5510, I create site to site vpn, and it´s working  perfect, but with slow speed (depending protocol to use). I test with  SMB, SMB2, FTP, SCP, and IPERF obtein next result (downloading from site  B):

SMB: 400 KB

SMB2: 6 MB

FTP: 500 KB

SCP: 800 KB

IPERF: 5 MB

Banthwith site A: 100 Mb / 100 Mb

Banthwith site B: 100 Mb / 25 Mb

Latency: 180-190 ms.

I've tried changing the settings tcp mss and mtu, but I've not got any improvement.

do yoy think that I have a problem with configuration or is normal taking into account the latency?

[Gabriel Hill]

Hey Jorge,

I would say the speeds you're experiecing would be normal with that high of a latency.

Simple caculator

http://www.speedguide.net/bdp.php

Also Brad Hedlund wrote an excellent article about TCP speeds over long distances, a good read.

http://bradhedlund.com/2008/12/19/how-to-calculate-tcp-throughput-for-long-distance-links/

-Gabriel

[123jorgeg]

Thanks for the reply.

I have been everything clear, great article.

[Gabriel Hill]

Glad to hear.

Please rate post if useful.

Cheers,

Gabriel