In Q-in-Q scenario with ingress analyzer and input-vlan-map push is configured on EX4400 , wrong vlans-tags seen on the mirrored . vlan formatting is needed to add the proper vlan-tags to the egress frame. this issue does not have any service impact

in Q-in-Q scenario , when frame enters EX4400 with dual vlan-tags , traffic send out with three vlans . mirrored traffic will be seen with wrong vlan tags on the mirror server.

input with dual-tags-----> (EX4400)----->output with three vlan-tags
                                |
                          mirrored traffic
                                |
                          mirror server                  

set interfaces <input-interface> unit <*> input-vlan-map push <<<<<<push 3rd vlan is configured

set forwarding-options analyzer <instance-name> input ingress interface <input-interface>

set forwarding-options analyzer <instance-name> output interface <mirror-intrface>

vlan formatting is needed for the mirrored frame to attach the correct vlan-tags. is it fixed on PR1756971

customer need to upgrade to one on the Junos that has the fix

Need VlanFormat to qualify on single/dual tagged packets for Trident 3.