perfSONAR User Q&A and Other Discussion

[Szymon Trocha <>]

W dniu 11.09.2015 o 16:57, Xu Chen pisze:

Hello all,

I plan to do a regular throughput test between any two ps nodes using bwctl command line tool. I have done some tests like the below:

1. I chose these two nodes, I got the feedback.

# bwctl -s perfsonar.nst.musc.edu -c ps-1.oit.umass.edu -t 30

bwctl: Using tool: iperf

bwctl: 60 seconds until test results available

RECEIVER START

------------------------------------------------------------

Server listening on TCP port 5232

Binding to local address 192.80.83.69

TCP window size: 87380 Byte (default)

------------------------------------------------------------

[ 15] local 192.80.83.69 port 5232 connected with 128.23.0.73 port 52272

[ ID] Interval       Transfer     Bandwidth

[ 15]  0.0-30.2 sec  3464364032 Bytes  918552954 bits/sec

[ 15] MSS size 1448 bytes (MTU 1500 bytes, ethernet)

RECEIVER END

2. When I changed the receiver to my ps node, I met the following error.

bwctl -s perfsonar.nst.musc.edu -c pr20.uml.edu -t 30

bwctl: Using tool: iperf

bwctl: 39 seconds until test results available

RECEIVER START

bwctl: Remote 'client' (perfsonar.nst.musc.edu) never initiated handshake: listening at port(6108) - canceling

RECEIVER END

Does it mean that my node misconfigures something? 

How do I know that any perfSONAR node has enabled the service?

Hi Chen,

There should be bwctld deamon running. Check with ps -ef|grep bwctld
If you access the web interface of your instance you should also see a list of Services Offered with their status.

Wrt error it may indicate some firewall problem as it can’t connect to the BWCTL “peer ports” . It is recommended that 6001-6200 be used for this variable and allowed in/out in fw.

Regards,

-- 
Szymon Trocha

Poznań Supercomputing & Netw. Center ::: NETWORK OPERATION CENTER
Tel. +48 618582022 ::: http://noc.man.poznan.pl