Have install netflow on a server and configure sflow on my switch. However, I still couldnt get any traffic. Anyway, this is my config on the switch
ProCurve Switch 4204vl# walkmib 1.3.6.1.4.1.14706 sFlowVersion.0 = 1.3;HP;L.10.23 sFlowAgentAddressType.0 = 1 sFlowAgentAddress.0 = c0 a8 03 01 sFlowRcvrOwner.1 = scrut sFlowRcvrTimeout.1 = 99,933,024 sFlowRcvrMaximumDatagramSize.1 = 1400 sFlowRcvrAddressType.1 = 1 sFlowRcvrAddress.1 = c0 a8 00 05 sFlowRcvrPort.1 = 9996 sFlowRcvrDatagramVersion.1 = 5