Re: A QinQ problem with QFX5100

I was little bit... wrong 🙂
That's must be right solution:
set interfaces ae31 flexible-vlan-tagging
set interfaces ae31 mtu 9216
set interfaces ae31 encapsulation extended-vlan-bridge
set interfaces ae31 unit 3174 vlan-id-list 21-22
set interfaces ae31 unit 3174 native-vlan-id 3174
set interfaces ae31 unit 3174 input-vlan-map push
set interfaces ae31 unit 3174 output-vlan-map pop