Hi,
I have a QFX10002-36Q, and I configured sFlow with the following commands:
set protocols sflow polling-interval 20
set protocols sflow sample-rate ingress 10000
set protocols sflow source-ip 10.x.x.246
set protocols sflow collector 172.x.x.210
set routing-options static route 172.x.x.x/32 next-table mgmt_junos.inet.0
However, it seems that it cannot use the em0 interface to send flows.
According to this Juniper article (https://supportportal.juniper.net/s/article/QFX-Example-How-to-send-sFlow-packets-using-mgmt-junos-non-default-routing-instance?language=en_US), it should be possible when using em0.
Any ideas?