Flow-tools is a set of programs and a library used for processing 
netflow packets from routers and switches. Netflow is a UDP based 
protocol designed initially by cisco and adopted  other network vendors 
(after deciding it was not worth maintaining their own protocols) to 
meter network traffic in a more flexible manner that is possible by 
using SNMP.

see http://www.cisco.com/en/US/tech/tk812/tech_protocol_home.html
        http://www.splintered.net/sw/flow-tools/

cflow and pyflowtool provide an interface to the flow tools library for 
their respective language.

  see http://net.doit.wisc.edu/~plonka/Cflow/
          http://www.net.informatik.tu-muenchen.de/~robin/flowtools/

Hope this helps.

Jeff.

On 03/05/2004, at 12:04 PM, James Britt wrote:

> jm wrote:
>> Module: vflow
>> Version: 0.1b
>> Description
>> Vflow is a ruby module similar to perl's Cflow and python's 
>> pyflowtool.
>
> What are Cflow, pyflowtool, and the flow-tools library?	
>
>
> Thanks,
>
> James
>
>