The subject says it all. I'm trying to turn on flexible-vlan-tagging on a lacp interface ae0 however it is not there. I also checked on a physical port ge-0/0/0 and also xe-0/1/0 and the only option is vlan-tagging. We would like to have vlan members pass from the QFX-5100 our aggregation switch to the EX-4200 while keeping the switch traffic on the same interface.
According to the Juniper Documentation this should be obtainable as of Junos OS Release 13.2X50-D15 for EX Series switches. I updated the EX-4200 to the JTAC Recommended Software Version of Junos OS Release 15.1R7.9 thinking this would solve my issue since it was on 12.X prior to the update.