I've got netflow set up on a catalyst 4500 with a supervisor V-10GE. It's dumping data to my collector but the flows look very weird, most of the flows have very high durations...
duration for most flows are all 4294952.292 seconds. UPD, ICMP and TCP sesions... some flows have 0s duration, and a few look normal.
In addition there a no tcp flags on the "weird" TCP sessions.
I'm exporting netflow version 5 dumped to nfdump. Netflow from a couple of other routers look ok, so i'm guessing it's not the collector...
using sw version 12.2(37)SG1
anyone have any ideas?