We got a WS-C6506-E with Supervisor Engine 2T 10GE. I'm trying to export flows for analysis (I was already doing this in our previous switch with supervisor 720 with no problems).
When I activate flow in just one interface the bandwidth drops really bad (iperf show 138Mbits/sec). Without netflow we got 931Mbits/sec.
Cisco IOS Software, s2t54 Software (s2t54-IPBASEK9-M), Version 15.1(1)SY, RELEASE SOFTWARE (fc2)
flow exporter FlowExporter1
transport udp 9090
flow monitor FlowMonitor1
record platform-original ipv4 full
ip address Y.Y.Y.Y 255.255.255.0
ip access-group trafficNetExtUseIn in
ip access-group trafficNetExtUseOut out
ip helper-address H.H.H.H
ip nat outside
ip flow monitor FlowMonitor1 input
So the "ip flow monitor FlowMonitor1 input" command kills the bandwidth. Removing it, restores it.
We don't have so many flows (usualy range is 4000-6000):
#sh platform flow ip count
Number of netflow entry is 4586