Hi,
I think you may need vlan-map push and pop:
https://kb.juniper.net/InfoCenter/index?page=content&id=KB24398&actp=RSS
interface ge-1/0/0 { flexible-vlan-tagging; encapsulation flexible-ethernet-services; unit 600 { encapsulation vlan-bridge; vlan-id 600; input-vlan-map { push; vlan-id 1; } output-vlan-map pop; } }
Cheers,
Ashvin