perfSONAR User Q&A and Other Discussion

[Zhi-Wei Lu <>]

Hi Andy,

I am trying to specify an "-i" (--interface) for ndt (web100srv) in
/etc/sysconfig/ndt configuration file, but web100srv appears to ignore the 
"-i" option.

I tried interface name or ip address, but ndt still listens on all interfaces:

netstat -natp|grep 3001
tcp        0      0 0.0.0.0:3001                0.0.0.0:*                   
LISTEN      12255/web100srv     

Thanks!

Zhi-Wei Lu
IET-CR-Network Operations Center
University of California, Davis
(530) 752-0155

-----Original Message-----
From: Zhi-Wei Lu 
Sent: Friday, January 02, 2015 10:47 AM
To: 'Andrew Lake'
Cc: 
;
 Daniel Doyle
Subject: RE: [perfsonar-user] tips for One way latency and bw test on 
separate NICs on perfSonar 3.4rc2

Thanks Andy,

It is working from netstat output  (even though the web page is still 
advertising for both interfaces).

netstat -natp |grep bwctld
tcp        0      0 128.120.80.74:4823          0.0.0.0:*                   
LISTEN      580/bwctld          

netstat -natp |grep owampd
tcp        0      0 128.120.80.78:861           0.0.0.0:*                   
LISTEN      1266/owampd   

Zhi-Wei Lu
IET-CR-Network Operations Center
University of California, Davis
(530) 752-0155

-----Original Message-----
From: Andrew Lake 
[mailto:]
 
Sent: Friday, January 02, 2015 10:39 AM
To: Zhi-Wei Lu
Cc: 
;
 Daniel Doyle
Subject: Re: [perfsonar-user] tips for One way latency and bw test on 
separate NICs on perfSonar 3.4rc2

/etc/init.d/bwctld restart
/etc/init.d/owampd restart


Thanks,
Andy


On Jan 2, 2015, at 1:33 PM, Zhi-Wei Lu 
<>
 wrote:

> Thanks Andrew,
> 
> I have modified the config file with srcnode <ip-of-eth1>:861 in 
> /etc/owampd/owampd.conf 
> and I also added srcnod <ip-of-eth0>:4823 for /etc/bwctl/bwctl.conf
> 
> I am not quite sure which script(s) I should use to restart the daemon 
> processes?  I am getting errors
> 
> /etc/init.d/perfsonarbuoy_owp_master restart
> Conf::must_get_val(ATTR=>NODE, ) undefined, called from 
> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/powmaster.pl:154
> Conf::must_get_val(ATTR=>NODE, ) undefined, called from 
> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/powmaster.pl:154
> Conf::must_get_val(ATTR=>NODE, ) undefined, called from 
> /opt/perfsonar_ps/perfsonarbuoy_ma/bin/powmaster.pl:154
> Couldn't start perfSONAR-BUOY OWAMP Measurement Service
> 
> Thank you for your help
> 
> 
> Zhi-Wei Lu
> IET-CR-Network Operations Center 
> University of California, Davis
> (530) 752-0155
> 
> -----Original Message-----
> From: Andrew Lake 
> [mailto:]
>  
> Sent: Friday, January 02, 2015 7:33 AM
> To: Zhi-Wei Lu
> Cc: 
> ;
>  Daniel Doyle
> Subject: Re: [perfsonar-user] tips for One way latency and bw test on 
> separate NICs on perfSonar 3.4rc2
> 
> Hi,
> 
> If you only want to accept OWAMP connections (like those initiated by 
> powstream) on one of the ports you can try editing /etc/owampd/owampd.conf 
> and set "srcnode <ip-of-eth1>:861". Replace <ip-of-eth1> with the IP 
> address of eth1. That should cause OWAMP to only listen on eth1 instead of 
> all interfaces. I haven't actually tried it but in theory that should work.
> 
> Thanks,
> Andy
> 
> 
> On Dec 28, 2014, at 3:34 PM, Zhi-Wei Lu 
> <>
>  wrote:
> 
>> Hi all,
>> 
>> I am reviving my old thread as I am progressing more on this TWO NICs 
>> setup.
>> 
>> I have configured two NICs with Linux policy routing, with one NIC as a 
>> primary, currently performing regular tests with bwping, bwtraceroute, and 
>> bwctl, while the other NIC was configured for powstream (one way latency 
>> tests).  I manually configured with the configure file in
>> /opt/perfsonar_ps/regular_testing/etc/regular_testing.conf
>> 
>> After each <test>, I manually and explicitly added (rather than using 
>> implied "default" interface, problematic in a multi-NICs situation)
>> 
>> local_interface eth0
>> for bwping, bwtraceroute, and bwctl
>> 
>> local_interface eth1
>> for latency tests (powstream)
>> 
>> I am wondering how I can modify my configuration files to advertise 
>> INCOMING powstream only on ip address corresponding to eth1 and other 
>> tests to eth0.  Currently, the web GUI advertises all tests on both 
>> interfaces.
>> 
>> Thank you very much for your insight and have a wonderful New Year!
>> 
>> 
>> On 07/30/2014 12:38 PM, Trey Dockendorf wrote
>>> That's a problem with Linux I believe.  Having two interfaces on the same 
>>> subnet will result in both IPs responding but if you do an arping to each 
>>> IP you will likely see that the same MAC address is hit every time.  I do 
>>> not know the right way to fix this, so I've always avoided that situation 
>>> of configuring two NICs on the same subnet.
>>> 
>>> RedHat has knowledge base articles regarding this but it's for 
>>> subscribers only.  Here's something similar but not requiring a 
>>> subscription, 
>>> http://z-issue.com/wp/linux-rhel-6-centos-6-two-nics-in-the-same-subnet-but-secondary-doesnt-ping/
>>> 
>>> Not sure if that's the problem your describing.
>>> 
>>> - Trey
>>> 
>>> =============================
>>> 
>>> Trey Dockendorf
>>> Systems Analyst I
>>> Texas A&M University
>>> Academy for Advanced Telecommunications and Learning Technologies
>>> Phone: (979)458-2396
>>> Email: 
>>> 
>>> Jabber: 
>>> 
>>> 
>>> ----- Original Message -----
>>>> From: "Zhi-Wei Lu" 
>>>> <>
>>>> To: "Daniel Doyle" 
>>>> <>
>>>> Cc: 
>>>> ,
>>>>  "Pulak K Chowdhury" 
>>>> <>
>>>> Sent: Wednesday, July 30, 2014 1:56:23 PM
>>>> Subject: RE: [perfsonar-user] tips for One way latency and bw test on 
>>>> separate NICs on perfSonar 3.4rc2
>>>> 
>>>> Hi Daniel,
>>>> 
>>>> Thanks for the tip and I have found it configuration in the web gui.
>>>> 
>>>> However, I am stuck again!  I started the system with one configured
>>>> NIC and scheduled "owamp" test.  Later, I enabled the second NIC on
>>>> the same subnet, now the "Throughtput/Latency Graphs" won't
>>>> displayed at all, a perpetual spinning circles goes around (even
>>>> after I disabled the second NIC).
>>>> 
>>>> If I have two NICs in the the same host on the same subnet, will the
>>>> outgoing tests use the first interface only (default route on the
>>>> default NIC)?  While both interface were up, the "local services"
>>>> show all tests running on both NICs, how can I configure the
>>>> incoming tests for individual NIC.  With two NICs on the same
>>>> subnet, the incoming test comes the second NIC, but the outgoing
>>>> packets could be sent out on the first NIC, is that right?
>>>> 
>>>> Thank you.
>>>> 
>>>> Zhi-Wei Lu
>>>> IET-CR-Network Operations Center
>>>> University of California, Davis
>>>> (530) 752-0155
>>>> 
>>>> -----Original Message-----
>>>> From: Daniel Doyle 
>>>> [mailto:]
>>>> Sent: Wednesday, July 30, 2014 6:34 AM
>>>> To: Zhi-Wei Lu
>>>> Cc: 
>>>> ;
>>>>  Pulak K Chowdhury
>>>> Subject: Re: [perfsonar-user] tips for One way latency and bw test on
>>>> separate NICs on perfSonar 3.4rc2
>>>> 
>>>> Zhi-Wei,
>>>> 
>>>> This is configurable in the same place as you configure all the rest
>>>> of the test parameters, underneath "Toolkit Administration" on the
>>>> left in the section "Configure Tests".
>>>> 
>>>> There is now a new field called "Interface" under the Test Parameters
>>>> section of a test that defaults to "Default" which was the old
>>>> behavior. You can change this to instruct the test to use a specific
>>>> interface instead. All previously configured tests should have
>>>> "Default" set as their Interface option when upgrading.
>>>> 
>>>> Hope that helps.
>>>> 
>>>> -Dan
>>>> 
>>>> On Jul 30, 2014, at 1:47 AM, Zhi-Wei Lu 
>>>> <>
>>>>  wrote:
>>>> 
>>>>> Hi all,
>>>>> 
>>>>> I have successfully installed perfSonar 3.4rc2 recently and I heard
>>>>> that it is now possible to configure owamp and bw tests on two
>>>>> separate NICs, I would love to learn how I can configure perfSonar
>>>>> to accomplish two NIC set up.
>>>>> 
>>>>> Thank you very much for your help.
>>>>> 
>>>>> --
>>>>> Zhi-Wei Lu
>>>>> IET-CR-Network Operations Center
>>>>> University of California, Davis
>>>>> (530) 752-0155
>>>> Dan Doyle
>>>> GlobalNOC Software Developer
>>>> 1-812-856-3892
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>> 
>> -- 
>> Zhi-Wei Lu
>> IET-CR-Network Operations Center
>> University of California, Davis
>> (530) 752-0155
>> 
>