Just had this EXACT problem on a MX85 (both WAN ports). Disabled EEE on the uplink switch, port is now stable. Do anyone know if there is a bug on this ? (its not anywhere in the release notes). ... View more

To set a dry vlan (L2), you don't need to set anything on a L3 device (appliance). You just untag the vlan on the needed ports on the switches and they will communicate with each others.     ... View more