Juniper QFX QinQ configuration

Trying to to a simply QinQ interface on a QFX5100.

I've setup the below on the QFX interface but it's not working:

set interfaces ge-2/0/1 flexible-vlan-tagging
set interfaces ge-2/0/1 encapsulation flexible-ethernet-services
set interfaces ge-2/0/1 unit 200 vlan-tags outer 1000
set interfaces ge-2/0/1 unit 200 vlan-tags inner 200
set interfaces ge-2/0/1 unit 200 family inet address 1.2.3.4/30

I know the switching on the inside is fine as if I replace the Juniper with a Cisco with a similar config it works fine.

interface GigabitEthernet0/0.1000
encapsulation dot1Q 1000 second-dot1q 200
ip address 1.2.3.4 255.255.255.252

Am I missing something in my config?

Thanks