Sorry if this discussion has been had recently but

[Drew Weaver <drew.weaver () thenap com>]

            I know there is a way to do this, but what is the absolute
Defacto best method of tracking flows from Cisco/Juniper routers? I know
there is some freeware available such as cflowd but we really need something
that will alert us to trouble before it becomes a problem. We don't mind
buying an appliance to do this, and it doesn't have to be freeware software,
we just want something that will work.

 

Thanks,

-Drew