[nsp] Netflow analysis tools

[Streiner, Justin]

For those of you who are using Netflow analysis tools for things like
traffic monitoring, capacity planning, and identifying/tracking DoS
attacks, what tools are you using?  Freeware tools are preferred at this
point.

I've briefly messed around with a few commercial and freeware tools, and
am curious what other people are using in medium to large-sized ISP/NSP
environments.

jms