If the switchport is set as an access port then there is no native VLAN from the device point of view.  From the switch port any traffic going into the switch will be put into the access VLAN, regardless of any VLAN tags.  If you have a trunk port with a native VLAN then you need the VLAN to be set to that in the AP config. ... View more

Normally the MX is equipped with the correct downlink ports according to the maximum throughput so the need for downstream LACP is not needed. However what I do find a little problem is the following: The lack to designate 2 ports to the same WAN link. Take following scenario into account: You have two rooms where you terminate a WAN line and there is a router in each room, downstream those routers do an FHRP to have the same subnet available on both locations for redundancy.  So you need WAN1 of your MX available in both rooms, so you connect the WAN1 to a switch stack in that same room and then that switchstack uplinks to both core switches.  However if a switch in that stack fails that happens to contain your only WAN1 link from the MX, the entire device has to do a failover.  Whereas if you would have been able to have a bundle upstream you could connect to two switches in that stack and have better redundancy that way. ... View more