Folding Forum

Are you seeing slow networking to Stanford? If so, please try this out:

1) Go to http://iperf.stanford.edu

2) Click on the "Start" Button

3) You'll see a report. Here's an example of a typical DSL connection

running 10s outbound test (client-to-server [C2S]) . . . . . 433.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 1.67Mb/s

I'm just quoting the bandwidth lines you'll see (it will print some other info too).

4) If you see slow uploads (eg outbound is less than 30kb/s) and you have broadband (DSL, cablemodem, etc), then could you repeat from step 2 and see if this is reproducible.

5) If you're seeing reproducibly slow connections, the iperf diagnostics can tell you what's the cause (eg Stanford or your ISP). If it's your ISP, please check with them (this report may be useful). If it's Stanford, could you post your bandwidth lines as well as your ISP. We'll forward this info along to Stanford IT.

TCP/Web100 Network Diagnostic Tool v5.4.12
click START to begin

Server process not running: start web100srv process on remote server (iperf.stanford.edu:3001)

click START to re-test

We don't run this iperf server, so if it's down for you, could you hit the "report problems" link on that page? Thanks.

PS It seems to work from here.

Probably just the corporate firewall here. I'll try it from home later.

Works from Boston, MA area.
ISP = Verizon Fios

running 10s outbound test (client-to-server [C2S]) . . . . . 1.17Mb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 15.10Mb/s

Works from here. Bloomington, IL (smack dab in the middle of Illinois) via Verizon DSL in a rural area. Not too bad, all things considered.

WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
checking for firewalls . . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client-to-server [C2S]) . . . . . 133.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 690.85kb/s

Connected to: iperf.stanford.edu -- Using IPv4 address
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
checking for firewalls . . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client-to-server [C2S]) . . . . . 482.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 530.92kb/s
Your PC is connected to a Cable/DSL modem
Information [S2C]: Packet queuing detected

Upload looks OK. Download is a way low, but I noticed that before the test. I am not sure what the "Information" line means. It is obvious what it says, but I have no clue why it says that.


Road Runner Cable - 384/3.0 - South Texas

running 10s outbound test (client-to-server [C2S]) . . . . . 731.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 1.30Mb/s
Your PC is connected to a Cable/DSL modem
Information: Other network traffic is congesting the link
[S2C]: Packet queuing detected

Quest DSL 1500/1000 from suburb of Phoenix.

PS Since only Mods can post here, I've started another thread here

viewtopic.php?f=18&t=5234

so others can post.

running 10s outbound test (client-to-server [C2S]) . . . . . 383.0kb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 2.04Mb/s
Your PC is connected to a Cable/DSL modem
[S2C]: Packet queuing detected

Should be :

Download speed 3616 kbps
Upload speed 928 kbps

Orange ADSL DebitMax 8 Mbps from France ... (yes, my phone line is 4.7 km long, it explain the slow synchronization speed).

Speed is constant during the test ... :