[c-nsp] Cache Flow

[Keith]

How much cpu load does enabling ip route-cache flow on an interface put on
a router?

Have a 7206vxr with 256M of ram. Runs BGP, but we only take a default
route from that particular upstream, not full or partial tables.

Router peaks out about 300Meg of traffic total in/out with the cpu topping
out around 45-50%.

I don't want to export the flows, but at least get an idea of the flows
on the router using sho ip cache flow.

Software running on this router is (C7200-IS-M), Version 12.3(15).

Thanks,
Keith