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Juniper VLAN inner tags

Sample configuration on a router where xe-0/0/0 faces another carrier. That carrier is handing off a QinQ circuit as vlan2345. This is accessing the inner VLANs. Tested on Juniper MX.

Quite straight forward, you just create a unit per inner vlan (1001, 1002, 1003) and use the same 'outer' (2345) for each. This way you can still use each vlan for different purposes- routing, bridging, l2circuit, etc.

interfaces {
   xe-0/0/0 {
       description "NNI Facing carrier";
       flexible-vlan-tagging;
       mtu 9192;
       encapsulation flexible-ethernet-services;
       unit 1001 {
           vlan-tags outer 2345 inner 1001;
           family inet {
               mtu 1500;
               filter {
                   input sample-only;
               }
               address 10.10.70.141/30;
           }
       }
       unit 1002 {
           apply-groups-except ethernet-standards;
           encapsulation vlan-bridge;
           vlan-tags outer 2345 inner 1002;
       }
       unit 1003 {
           apply-groups-except ethernet-standards;
           encapsulation vlan-ccc;
           vlan-tags outer 2345 inner 1003;
       }
   }
}