> I am wondering on what kind of equipment you are running netflow switching.
> We were advised that turning on netflow switching on our router, the cpu
> load would go up by as much as 50 %. Obviously our 7XXX series cannot handle
> that on high speeds (E3 and up). Our GSR's do not have problem running it
it is not a matter of the interfaces you are using. The performance impact
depends much more on the packet rate and the flow rate on your box and
if you are using distributed or non-distributed switching.
Talking about the 75xx it is possible to forward about 100.000 pps per
using NetFlow in a non-distributed way with several OC-3 AIPs and
an RSP2. But this is much more the limit of the RSP2 than the one of
the router. As Jeffrey already mentioned on the list, it makes much more
sense when using VIPs and NetFlow in a distributed way together with
The GSR itself hat a distributed architecture therefore the accounting
is made on the line cards. But even there 100.000 pps could block a Engine 0
card when using non-sampled NetFlow accounting.
-- cflowd mailing list firstname.lastname@example.org
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