All,
The newest code of Extreme VSP switches support sflow. I went through and configured everything on the test switch and am seeing sflow packets make it to the server. I'm sure I'm using the correct port (using 2055 for Netflow and 6343 for sFlow) and the device sending the packets is defined in NPM. Unfortunately I'm not getting any data for this particular device (whereas my Fortigates are reporting fine (on port 2055).
Using NPM 12.3 and NTA 4.4.0 with all patches.
Any ideas on where to turn next?