Tiago,
You should configure your routers carefully, choosing each interface that
should have netflow monitoring enabled and also looking at the flow of the
traffic - inbound or outbound - in each interface.
The configuration planning also should avoid exporting duplicate flows to
nfsen collector, meaning that a flow incoming in one router's interface and
outgoing in a different interface of the same router will be "counted
twice".
Best regards,
Alex
P.S.: Um abraço
2012/3/6 Tiago Flôres <[email protected]>
> Dear colleagues
>
> I have eight routers exporting flow to one source (I am not sure if it
> is the best scenario) or should I have each router exporting flow to
> own source (router1 -> source1, router2 -> source2, ...). One of these
> routers is a mpls concentrator and the others seven are peers, like
> clients. The concentrator is where the servers are installed. The
> network traffic are mostly destinated to the main site (router1) which
> has 34Mbps mpls bandwidth.
>
> I am using DST NET and SRC NET to classify the traffic for down and
> upload directions. The thing is I've been getting discrepancies in
> traffic graphs. The main site where I've 34Mbps 'physically limited'
> is showing me up to 90 Mbps in nfsen graphs.
>
> Remembering that I have eight routers exporting to one source. In this
> among of flows I am trying to analyze and identify the traffic which
> goes to router1, but the traffic graphed is much more than the
> interface is able to support.
>
> The flows are from all interfaces of all routers? LAN and WAN?
>
> By default nfsen aggregates identical network traffic? Or could the
> flows are not been aggregated?
>
> I am guessing around .... the same traffic which ingress in router1
> WAN is arriving in router1 LAN interface, what about it?
>
> Thanks in advance for any explanations
>
>
> Hugs
>
> Tiago
>
>
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