DS3 - slow throughput

[smessall]

We have a VPN tunnel between 2 different sites with DS3 connections to the Internet. We get very slow data transfer between the 2 sites and when I watch the output rate on either end it never gets above ~2.5 Mbps. I'm transferring 50MB files and it takes about 8 minutes to transfer between the sites. There are no limits on our connections and download speeds from other sites will burst up to ~40 Mbps. If I take VPN encryption out of the way, we still see slow outbound transfer rates. Anyone have any idea why we would see slow outbound transfers?

[vkapoor5]

You can do some physical layer testing to check if you get DS3 rate in your local loop. Since you are using Internet to connect the sites, I doubt whether you will get the same rate end-to-end unless the provider is guaranteeing QoS and has commited for this SLA.

[lprindle]

We have had the same issues and it was determined that some parameters in the ftp software. The slider window was set to small. Hope that helps.

Lloyd

[cisand2002]

Agree with Lloyd.

I have already seen this..

to test it, please run several ftp sessions at the same time..

cisand