perfSONAR User Q&A and Other Discussion

[Eli Dart <>]

bwtraceroute -s <remote_host>

Note that the cause of the performance disparity may be packet loss in one direction....

Eli

On Thu, Mar 3, 2016 at 2:59 PM, John-Paul Robinson <> wrote:

Thanks for the links and pointers.

I've run some tests between ps-lax-10g.cenic.net since traffic there passes through the shared path from Bham, Atlanta, Houston, LA (losa).

My perfsonar node is tuned according to the esnet best practices for multi-TCP stream.  I get respectable transfers when this node is the bwctl client (bwctl -c, runs iperf3 server) of around 2Gbs, so pushing data to LA across Internet2 appears to be good.  The transfers for when cenic is the bwctl server (bwct -s, we run the iperf3 server) average around 300Mbs.

I'm trying to make sense of this disparity.  Is there a way to run a traceroute from that node to our site? I know I could usually go to the perfsonar web UI of the remote host and run a reverse traceroute but this host doesn't seem to allow access via the web ui.

~jpr

On 03/02/2016 01:30 PM, Brian Tierney wrote:

Also, you can see all the California servers here:

http://stats.es.net/ServicesDirectory/#search=state%3ACalifornia

(and zoom in on the location of interest)

On Wed, Mar 2, 2016 at 4:44 AM, Jason Zurawski <> wrote:

Hey JPR;

I believe I know of a couple - but the exact plumbing of how physically close they are to the various LA POPs will need some help from others that know:

    IU International/Transpac: nms2.transpac.org
    JPL: 130.152.181.53
    Los Nettos: ps-bw.ln.net, ps-dly.ln.net
    CENIC: ps-lax-10g.cenic.net, ps-lax-dc-1g.cenic.net, ps-lax-dc-owamp.cenic.net

Thanks;

-jason

John-Paul Robinson wrote:

Hi,

What's the best way to find a perfsonar test node near an Internet2
peering point?  The traceroutes to a NET+ service we are using
terminates at the Internet2 core router (
et-4-0-0.10.rtr.wilc.net.internet2.edu), located in LA according to
https://routerproxy.grnoc.iu.edu/internet2/.

I'd like to determine what our best bandwidth is to this point from our
science dmz.

Thanks,

~jpr

--

Brian Tierney, http://www.es.net/tierney
Energy Sciences Network (ESnet), Berkeley National Lab
http://fasterdata.es.net

--

Eli Dart, Network Engineer                          NOC: (510) 486-7600

ESnet Office of the CTO (AS293)                          (800) 333-7638

Lawrence Berkeley National Laboratory 

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