[VoiceOps] Easy ways to measure PDD

[Richard Jobson]

Do you have an SBC or switch that already measures this and outputs it with
the CDR?

Do you want to report on all PDD long-term?  Or just one or two specific
calls?


 Regards,

Richard 

From:  "Calvin E." <calvine at gmail.com>
Date:  Monday, April 20, 2015 at 4:07 PM
To:  VoiceOps <voiceops at voiceops.org>, <beckman at angryox.com>
Subject:  Re: [VoiceOps] Easy ways to measure PDD

> Since you can already parse the pcap, here's a napkin sketch assuming
> something like php, bash, tcsh, etc. Were you looking for something more
> specific?
> 
> Find all INVITEs, store (as in-memory temp data)  timestamps, Call-ID, and
> CSeq
> Find first matching non-100 response for each INVITE based on Call-ID and Cseq
> (in case there are later reinvites)
> Calculate difference in timestamp
> ...
> Profit!
> 
> On Mon, Apr 20, 2015 at 11:35 AM, Peter Beckman <beckman at angryox.com> wrote:
>> Thanks Matthew... but...
>> 
>> "I don't want to manage yet another server or metrics repository in order
>> to hold all of this call data..."
>> 
>> This requires a whole pile of new software to be installed AND MySQL to be
>> run somewhere. http://www.voipmonitor.org/doc/Architecture
>> 
>> I have .pcap files from tcpdump with the call data. sngrep can parse it
>> very fast and very well, but it is a curses-GUI and I need something I can
>> automate.
>> 
>> Dream workflow:
>> 
>>     sipgrep --packet-type-start INVITE --report pdd --direction outbound \
>>         --input-packet-capture sip07.pcap \
>>         | shell-script-mangle \
>>         | xargs -n1 push-metrics
>> 
>> This way I can have a graph of PDD per termination partner (the
>> shell-script-mangle would translate IP addresses into service provider
>> tags/names) and push the metrics to my existing metrics system (statsd +
>> graphite +
>> grafana) and alert when things pass a threshold.
>> 
>> Beckman
>> 
>> On Mon, 20 Apr 2015, Matthew Crocker wrote:
>> 
>>> www.voipmonitor.org <http://www.voipmonitor.org>
>>> 
>>> PDD charts and so, so much more.
>>> 
>>>> On Apr 20, 2015, at 5:11 PM, Peter Beckman <beckman at angryox.com> wrote:
>>>> 
>>>> So after a recent discussion about how to quickly diagnose SIP calls from
>>>> packets (tcpdump + sngrep for the win!), I'm now wondering if there is a
>>>> tool I don't know about that would be able to parse the same .pcap file
>>>> that contains all of my port 5060 traffic and output the PDD time for each
>>>> call found within. Bonus points if I can specify a time/date range.
>>>> 
>>>> I don't want to manage yet another server or metrics repository in order to
>>>> hold all of this call data, so some of the larger (and pricier) tools
>>>> mentioned before are out for me.
>>>> 
>>>> I've contacted the author of sngrep and though the packet capture code is
>>>> already there, he reasonably doesn't want to turn sngrep into sipawk or
>>>> sipsed.
>>>> 
>>>> Beckman
>>>> ---------------------------------------------------------------------------
>>>> Peter Beckman                                                  Internet Guy
>>>> beckman at angryox.com                                 http://www.angryox.com/
>>>> ---------------------------------------------------------------------------
>>>> _______________________________________________
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>>>> a4c8f73
>>>> 
>>> 
>>> 
>>> 
>> 
>> ---------------------------------------------------------------------------
>> Peter Beckman                                                  Internet Guy
>> beckman at angryox.com                                 http://www.angryox.com/
>> ---------------------------------------------------------------------------
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> 
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