[Nfsen-discuss] AS to AS traffic matrix

[Maurizio M. <mau...@da...>]

Hi,
I would like to have some opinion/advice on how a AS to AS traffic
matric visualisation could be implemented in NFSEN.
In our network (the GEANT2 core) we collect Netflow data on all the
peering interfaces with external networks (NRENs), and our routers are
configured to export "previous AS, next AS" information. Therefore, the
AS to AS traffic matrix for us corresponds to an NREN to NREN traffic
marix, and it would be very useful.
The AS numbers are known and fixed, so the commands to filter and
aggregate those flows are already available, both in nfdump and in nfsen.
In theory, I could set up a profile for each AS to AS relationship, but
this would mean manually define more than 400 profiles (we have more
than 20 peering ASs).
What I would like to have is:
1) a method to set up (and administer) these profiles in a compact way,
e.g. just  entering the 20 AS numbers, all the 400 profiles are
automatically set up.
2) a method to have a compact, tabular representation of the traffic
exchanged on each relationship, with the possibility of  selecting the
time window, in the past, to look at. That is, a method to select a
single value from the rrd files for each profile, and represent in a
table together with the analogous values of the other profiles.
3) Ideally, a method to focus then on a single row/column of the table
and have a graphical representation of the "time evolution" of that row
or column, e.g. in the form of a stacked graph like the ones that Nfsen
already provides

I'd appreciate any advice about how to tackle the  implementation of
such a feature, and in particular what existig pieces of nfsen can be
reused.
Thanks,
Maurizio

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Maurizio Molina
Network Engineer

DANTE - www.dante.net

Tel: +44 (0)1223 371 300
Fax: +44 (0)1223 371 371
Email: mau...@da...
PGP Key ID: 3FF58D51

City House, 126-130 Hills Road  
Cambridge CB2 1PQ                        
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