|
If you aren't going to use the netflow aggregation,
then this becomes an rrd issue.
Unfortunately, the summation (aggregation)
scenario is the one that hurts re rrd - you can't just
accumulate into an rrd. One update per second is all it will
accept.
So, to add RRDs by AS, you would need to walk the
HostTraffic structure, summing in memory and then do one update per AS.
"Dump Domains" is the model - it's not THAT hard to add the code (but let's move
this to ntop-dev if you're interested).
-----Burton
From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John
Hally
Sent: Thursday, March 10, 2005 9:13 AM To: '[email protected]' Subject: RE: [Ntop] Netflow aggregation Thanks What I'm looking to do
is to gather usage stats based on AS. I'm currently aggregating based on
AS at the border routers and doing no aggregation via Ntop, and I think that's
working out ok. One question I have is,
is there a way to keep the AS Info stats (RRD?) so that when the process gets
restarted I don't lose what's reported under Summary/AS
Info? Thanks! From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Burton Strauss Basically, it's what
YOU need it to be to meet YOUR needs. Aggregating at the
router (netflow collector, technically) reduces the amount of bandwidth consumed
for monitoring (and reduces the load on ntop). But it's more difficult
(sometimes) to change the collector options. Aggregating in ntop is
easy to change (just flip the dropdown). But it means ntop is processing
each flow. Whichever way you
aggregate, that's the level of detail ntop reports. No drill-down,
etc. just the aggregated data. ----- From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Hally Hello
All, Can someone tell me what the
benefits of the different netflow aggregation options are? Is it better to
not aggregate at the router, and then set up aggregation on Ntop, or should they
'line up', meaning, set AS aggregation on the router and also in
ntop? I guess which type of aggregation
you choose will also effect the type of reporting that Ntop is going to produce,
correct? Thanks in
advance! |
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