Re: EX2300/EX3400/EX4300 - sFlow v5 or other version?

sFlow is correctly documented in the feature explorer: https://apps.juniper.net/feature-explorer/feature-info.html?fKey=1314&fn=sFlow%20technology

It is also mentioned correctly in the release notes when the EX2300/EX3400 was introduced: https://www.juniper.net/documentation/en_US/junos/information-products/topic-collections/ex-series/release-notes/ex-series-junos-release-notes-15.1X53-D50.pdf on page 4.

I have just briefly tested on an EX3400 VC and it looks like it's working - i don't have a collector to validate that received data is actually useable... but I would expect so.

user@EX3400-VC# show protocols sflow
polling-interval 30;
inline-sampling;
sample-rate {
    ingress 500;
    egress 500;
}
collector X.X.1.10 {
    udp-port 6343;
}
interfaces ge-0/0/15.0;
interfaces ge-0/0/16.0;

user@EX3400-VC# run show sflow collector
Collector                                  Udp-port    Dscp     Forwarding-Class                No. of samples
 address
X.X.1.10                                6343        0        best-effort                     6      

{master:0}[edit]
user@EX3400-VC# run show sflow interface
Interface         Status              Sample              Adapted            Polling
                                       rate             sample rate          interval

               Egress  Ingress     Egress   Ingress      Egress   Ingress
ge-0/0/15.0     Enabled Enabled    500      500          500      500          30
ge-0/0/16.0     Enabled Enabled    500      500          500      500          30

{master:0}[edit]