Junos OS

Is there a way to force an interface up for testing  purposes 
I thought the secret was this

 
set interfaces ge-0/0/8 gigether-options loopback

But this alone does not have the desired effect when tested ( on a vSRX ) 

This is an interface with multiple units and IP addresses 

Thanks 

The command you mentioned is typically used to test the physical transceiver or the internal path of the interface, but since you have a vSRX it relies on the state of the vNIC

The command below is used for virtual environments or scenarios where you want to test routing without a cable plugged in

set interfaces ge-0/0/8 gigether-options no-carrier