[mrtg] Re: Measuring Traffic over FXO / FXS port /Question is changed :)

[Boğaç Özdöl]

Ok. I should change my question. 

I want to calculate the percentage of outgoing Voip traffic in outgoing traffic over a Serial (Frame Relay) link.

So is the formula 1 (I mean ...)  
[the size of voice traffic in bytes / the size of outgoing traffic over a Serial Port (Data+Video+Voice+etc...)= 

Or could I calculate voice traffic with a priority-list 
"access-list 150 permit ip any any precedence critical "

So is the formula 2 (I mean ...)  
( delta count of Voip packets * approximate packet size of used voip codec )

Thanks for advice..








-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch]On
Behalf Of Daniel J McDonald
Sent: Thursday, April 03, 2003 4:10 PM
To: Boğaç Özdöl
Cc: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Measuring Traffic over FXO / FXS port


On Thu, 2003-04-03 at 04:03, Boğaç Özdöl wrote:
> Hi All ,
> 
> How could I get traffic over FXS or FXO port with mrtg ?
> ifInOctets/ifOutOctets doesn't works... :)

What do you mean by traffic?  FXO and FXS don't carry bits....

If you mean you want to track the traffic generated by a voip
application feeding particular ports, well...  I did something like that
once, but the mibs are pretty nasty to work with.  I ended up using
radius accounting to get what I wanted and dumped it into a mysql
database.  Then, in mrtg I wrote a script that would query for the most
recent numbers and update it...  But it wasn't a very clean solution,
because you get all of the bits at the end of a call (e.g., a 1 hour
call has zero bits for the first 11 polling intervals, then a huge spike
on the 12th).  I ended up just counting the number of up interfaces so I
could figure out how many simultaneous calls I had in progress, and used
the database to calculate cost savings on the back-end.

In any respect, mrtg didn't really help with that application...

> 
> Thanks ...
> 
> 
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