Mirroring
https://www.juniper.net/documentation/en_US/junos/topics/example/port-mirroring-local-ex-series.html
user@switch# show
ethernet-switching-options {
analyzer employee-monitor {
input {
ingress {
interface ge-0/0/0.0;
interface ge-0/0/1.0;
}
}
output {
interface {
ge-0/0/10.0;
}
}
}
}