This article describes how to configure QinQ by using Enhanced Layer 2 Software Support (ELS) on Junos OS.

Example Topology:

Example Configuration:

CE-1

[master:0][edit]
root@CE-1# show vlans V10
vlan-id 10;
l3-interface irb.10;

[master:0][edit]
root@CE-1# show interfaces ge-0/0/1
unit 0 {
    family ethernet-switching {
        interface-mode trunk;
        vlan {
            members V10;

[master:0][edit]
root@CE-1# show interfaces irb.10
family inet {
    address 10.10.10.1/24;

PE-1

[master:0][edit]
root@PE-1# show vlans V2000
interface ge-0/0/1.2000;
interface ae0.2000;

[master:0][edit]
root@PE-1# show interfaces ge-0/0/1
flexible-vlan-tagging;
encapsulation extended-vlan-bridge;
unit 2000 {
    vlan-id-list 10-100;
    input-vlan-map push;
    output-vlan-map pop;

[master:0][edit]
root@PE-1# show interfaces ae0
flexible-vlan-tagging;
encapsulation extended-vlan-bridge;
aggregated-ether-options {
    lacp {
        active;
        periodic fast;
    }
}
unit 2000 {
    vlan-id 2000;

PE-2

[master:0][edit]
root@PE-2# show vlans V2000
interface ge-0/0/1.2000;
interface ae0.2000;

[master:0][edit]
root@PE-2# show interfaces ge-0/0/1
flexible-vlan-tagging;
encapsulation extended-vlan-bridge;
unit 2000 {
    vlan-id-list 10-100;
    input-vlan-map push;
    output-vlan-map pop;

[master:0][edit]
root@PE-2# show interfaces ae0
flexible-vlan-tagging;
encapsulation extended-vlan-bridge;
aggregated-ether-options {
    lacp {
        active;
        periodic fast;
    }
}
unit 2000 {
    vlan-id 2000;

CE-2

[master:0][edit]
root@CE-2# show vlans V10
vlan-id 10;
l3-interface irb.10;

[master:0][edit]
root@CE-2# show interfaces ge-0/0/1
unit 0 {
    family ethernet-switching {
        interface-mode trunk;
        vlan {
            members V10;

[master:0][edit]
root@CE-2# show interfaces irb.10
family inet {
    address 10.10.10.2/24;

2020-02-13: Replaced line diagram with an image since line diagram gets distorted when opened in browser.
2019-08-23: Corrected the PE interface in the topology diagram in the Solution section; no other changes made