[mrtg] Traffic Graphs for PPPoE Users

[Tim Sheahan]

I've dealt with similar issues. I'll describe the two solutions and you can 
tell me which sounds most interesting for your application:

At home, I have several qos class-maps configured on a router. Like 
subinterfaces these can be identified, and their byte counters fetched, via 
SNMP. I had trouble making this setup easily configurable, but your AV-pair 
solution addresses this part of it.

I have a perl module which could be adapted to your purpose with some 
alteration to the hard-coded SNMP OIDs and the calculation logic.

At work, I've written a peak/offpeak usage measurement system, also in Perl. 
Radius is configured to accept accounting packets from the cisco router and 
update a table called RADUSAGE. Using a perl subruntine I've written, it's 
possible to come up with byte-totals over a given time-trame. Your 
application is actually even much simpler, I think -

If you just wrote a tiny script to take a sum of the download-bytes and 
upload-bytes columns per user, I think MRTG would be able to make sense of 
those as a counter. This would be sufficient for data rate calculations if 
you aren't so interested in getting usage totals over a defined interval.


----- Original Message ----- 
From: "Khemara Lyn" <lin.kh at wicam.com.kh>
To: <mrtg at lists.oetiker.ch>
Sent: Saturday, March 28, 2009 3:31 PM
Subject: Re: [mrtg] Traffic Graphs for PPPoE Users


> Dear All,
>
> This is just a repost. I'm sure, someone out there would help me.
>
> Thanks,
> Khem
>
> On Thursday 26 March 2009 07:10:07 pm Khemara Lyn wrote:
>> Dear All,
>>
>> First, I'd like to apologize in advance; I'm very new in the list and 
>> this
>> is my very first post.
>>
>> I was browsing through the whole archive but could not find any solutions
>> to my problem.
>>
>> I have a Cisco router as a PPPoE server serving ADSL users with
>> authorization and accounting information stored on a RADIUS server.
>>
>> I'd like to be able to graph traffic on the Cisco router based on user
>> names. When a user comes online, a related interface is created with an
>> interface name starting with "Virtual-Access" and then  a PPP session
>> number. And the number is not fixed for a particular user; it is assigned
>> randomly whem a user dials in, making it impossible to graph the traffic 
>> by
>> interface name or IP.
>>
>> My question is that, does anyone have experience with graphing traffic
>> based on PPPoE users? Or at least based on interface description?
>>
>> The virtual interface description can be configured from a RADIUS 
>> AV-pair,
>> so there is a way to generate traffic graph based the interface
>> description, it would be one solution.
>>
>> Hope for your kind inputs
>>
>> Thanks & regards to all,
>> Khem
>
>
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