perfSONAR User Q&A and Other Discussion

[Andi Bergen <>]

Hi Aaron,

142.104.17.140 is the server host. Checking with netstat -nlp, port 6019 is not used by anything.

The public ip address of the VMs is visible and accessible from outside their private network.

Oh, I forgot to mention, sorry:

- if I run iperf on these ports, it works.

- Running iperf on the client and bwctl on the server does connect. Nothing happens, but then ctrl+c on client does show that a connection was made on the server (iperf).

- Running bwtcl on the client to iperf on the server works (the returned format is different).

- logging in from an external network to the public IP address works. 

We are using OpenStack to orchestrate the VMs.

It might be an issue with openstack, because a traceroute looks somewhat funny from 142.104.17.139 to the "server"
traceroute to 142.104.17.140 (142.104.17.140), 30 hops max, 60 byte packets
 1  142.104.17.140 (142.104.17.140)  95.876 ms  95.797 ms  95.732 ms
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * * *
 7  * * *
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * *^C

I hope that helps,

Andi

142.104.17.139

On 2014-09-02 11:14 AM, "Aaron Brown" <> wrote:

Hi Andi,

I see this error in the server logs:

> Sep  2 13:01:05 centos bwctld[122131]: FILE=endpoint.c, LINE=319, bind([142.104.17.140]:6019): Cannot assign requested address


Does the 142.104.17.140 host have the address 142.104.17.140 configured on it, or is it behind a NAT or something? I’m not sure why it wouldn’t be able to bind to that address.

Cheers,
Aaron

On Sep 2, 2014, at 1:40 PM, Andi Bergen <> wrote:

> Hi,
> I am having problems getting the bwctl to run successfully between two
> of my install locations.
>
> I followed the steps outlined here:
> https://fasterdata.es.net/performance-testing/perfsonar/ps-howto/level-1/
> and have this installed on two VMs.
>
> I downloaded the limits file from:
> http://stats.es.net/sample_configs/bwctld.limits
> (which does include a /16 address for our institution).
>
> What doesn't work is running
> bwctl -vv -c 142.104.17.140:4823 -f m -x -a 100
> or bwctl -vv -c 142.104.17.140 -f m -x -a 100
>
> However, running this TO any other machine (I found listed here
> http://stats.es.net/ServicesDirectory/#search=es) works.
>
> It also works just fine when using the internal IP addresses of these
> machines since they are on the same network.
>
> I checked that bwctl is bound on the external interface. And
> connections are going through, but then fail (please see attached
> /var/log/messages files for both machines).
>
> All UDP and TCP ports are open for machines in the same security
> group, as well as all ports I could find in the docs are open
> otherwise. The ports mentioned in the log files are opened.
>
> Attached are the /var/log/messages from the VM that is running the
> test (client.log) and the machine that functions as the "server"
> (server.log).
>
> Did I follow the wrong instructions, or am I missing something
> obvious? I am somewhat at a loss for what to check next...
>
> Thank you,
> Andi
> ps.
> Command line output from "client" bwctl -vv -c 142.104.17.140:4823 -f
> m -x -a 100
> (at a different time than the attached log files, but it is always the
> same except the time stamps of course):
> bwctl[122582]: FILE=bwctl.c, LINE=2931, Using 10.6.9.19 as the address
> for local sender
> bwctl[122582]: FILE=bwctl.c, LINE=2931, Using 142.104.17.140:4823 as
> the address for remote receiver
> bwctl[122582]: FILE=bwctl.c, LINE=2977, Available in-common: iperf nuttcp iperf3
> bwctl[122582]: FILE=bwctl.c, LINE=3002, Using tool: iperf
> bwctl[122582]: FILE=bwctl.c, LINE=3117, Requested Time: 1409679438.153914
> bwctl[122582]: FILE=bwctl.c, LINE=3119, Latest Acceptable Time:
> 1409680038.153914
> bwctl[122582]: FILE=bwctl.c, LINE=3292,
> Reservation(142.104.17.140:4823): 1409679448.061957
> bwctl[122582]: FILE=bwctl.c, LINE=3156, Server '142.104.17.140:4823'
> accepted test request at time 1409679448.061957
> bwctl[122582]: FILE=bwctl.c, LINE=3292, Reservation(localhost):
> 1409679448.061957
> bwctl[122582]: FILE=bwctl.c, LINE=3185, Client 'localhost' accepted
> test request at time 1409679448.061957
> bwctl[122582]: FILE=bwctl.c, LINE=3359, BWLStartSessions: Failed
> <server.log><client.log>