PVLANs with Secondary VLAN Trunk Ports on ex4600

Hi

I have a few stacks of ex3400 switches setup with PVLAN.  On each stack the uplink port goes into a single ex4600 unit as aggregation.

I wish my ex4600 to treat traffic from the ex3400 stacks as PVLAN traffic and only to forward it to a specific uplink port ( ie a firewall )

I have seen this page:

http://www.juniper.net/techpubs/en_US/junos/topics/example/private-secondary-vlans-qfx-series.html

But the commands referenced here are in the ex4600 software.

running:

14.1X53-D40.8

any ideas on how to achieve this goal?

Many thanks