Here is the documentation for sflow on the EX switches.
https://www.juniper.net/techpubs/en_US/junos14.2/topics/concept/sflow-ex-series.html
https://kb.juniper.net/InfoCenter/index?page=content&id=KB14855
Here is the documentation for sflow on the EX switches.
https://www.juniper.net/techpubs/en_US/junos14.2/topics/concept/sflow-ex-series.html
https://kb.juniper.net/InfoCenter/index?page=content&id=KB14855