Netflow question

Peter Van Epp vanepp at sfu.ca
Fri Jan 18 12:27:25 EST 2008


	What netflow field does argus use to decide that two flows are part
of the same flow (as this one should be)?

 08-01-11 11:38:58  e         tcp      142.58.101.50.25        ?>
71.90.234.102.1254          7       1035
 08-01-11 11:38:59  e         tcp      71.90.234.102.1254      ?>
142.58.101.50.25            9        682

neither ra nor racluster will combine this flow as they should be. I expect 
that means the netflow implementation on our switches (Enterasys) isn't 
including some field that argus needs to decide this is the same flow. If 
I know what field is needed I can see about getting it added to the firmware
in the switch.
	If I can figure out how (or possibly if :-)) wireshark filtering works
I can probably get an example of the netflow that created this (the entire
file is several hundred megs unfortunatly). 

Peter Van Epp / Operations and Technical Support 
Simon Fraser University, Burnaby, B.C. Canada



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