IX2215
マニュアル
https://www.express.nec.co.jp/idaten/network/ix/ix2k3k-learning-ver8.10_10.0.pdf
sflow
https://changineer.info/network/nec_ix/nec_ix_sflow.html
https://izuminmin.com/network/elastiflow-try/
https://blog.epsv.tech/posts/sflow/