perfSONAR User Q&A and Other Discussion

[Peter Jacobs <>]

 

I am having issues with my one-way latency tests on node lat-gp-ftn.nbren.ca to one destination, but other destinations are fine.  Based on the information and error below, where should I start looking to solve the problem? 

 

My node, lat-gp-ftn.nbren.ca is running a fresh net install of 3.3.2  and the other, lat-hlfx1pfs1.canarie.ca, is running 3.3.1  They can see each other and there are no firewalls between the nodes.   All other scheduled latency tests work fine on both nodes.

 

 

On this screen there is no reverse direction stat on the 5^th line in the table.  http://lat-gp-ftn.nbren.ca/serviceTest/index.cgi?eventType=owamp

 

but on the other node looking back (line 6) is okay.  http://lat-hlfx1pfs1.canarie.ca/serviceTest/index.cgi?eventType=owamp

 

Here are the results of a manual owping command…

 

First from lat-gp-ftn.nbren.ca which partially fails to the destination

 

[lat-gp-ftn ~]# owping lat-hlfx1pfs1.canarie.ca

 

Approximately 13.1 seconds until results available

 

owping: FILE=protocol.c, LINE=1270, _OWPReadTestRequest: Unable to read from socket.

owping: FILE=owping.c, LINE=1837, Unable to fetch data for sid(cdbd209ad6e3de34d4c21ec042ff4e96)

 

--- owping statistics from [lat-hlfx1pfs1.canarie.ca]:8785 to [lat-gp-ftn.nbren.ca]:8955 ---

SID:    c6a41dcad6e3de34dd29e8d81aaece90

first:  2014-03-31T09:29:41.973

last:   2014-03-31T09:29:51.357

100 sent, 0 lost (0.000%), 0 duplicates

one-way delay min/median/max = 4.64/4.8/4.77 ms, (err=0.402 ms)

one-way jitter = 0 ms (P95-P50)

Hops = 2 (consistently)

no reordering

 

 

Then from the other node back to my node:

 

[lat-hlfx1pfs1 etc]#  owping lat-gp-ftn.nbren.ca

 

Approximately 13.2 seconds until results available

 

--- owping statistics from [lat-hlfx1pfs1.canarie.ca]:8909 to [lat-gp-ftn.nbren.ca]:8859 ---

SID: c6a41dcad6e578ab32bfa21fb729648b

first: 2014-04-01T14:41:00.382

last: 2014-04-01T14:41:11.102

100 sent, 0 lost (0.000%), 0 duplicates

one-way delay min/median/max = 4.16/4.3/4.27 ms, (err=0.162 ms)

one-way jitter = 0 ms (P95-P50)

Hops = 2 (consistently)

no reordering

 

--- owping statistics from [lat-gp-ftn.nbren.ca]:8960 to [lat-hlfx1pfs1.canarie.ca]:8917 ---

SID: cdbd209ad6e578ab340d3b7c2d302acd

first: 2014-04-01T14:41:00.439

last: 2014-04-01T14:41:08.994

100 sent, 0 lost (0.000%), 0 duplicates

one-way delay min/median/max = 3.98/4.1/4.09 ms, (err=0.162 ms)

one-way jitter = 0 ms (P95-P50)

Hops = 2 (consistently)

no reordering

 

 

Thanks for any suggestions.

 

 

Peter E.

UNB – Information Technology Services