QinQ on EX4200 with arbitrary C-VLAN

Last updated on November 11, 2021

        Trying to setup an ethernet link from CE located in building A to CE in building B. Customer may or may not tag it's frames sent over the link.

Here’s the setup I am trying to use

+----+       +--------+      +----------+             +----------+  
| CE +--(A)--+ EX4200 +-(B)--+ Router A +---(L2VPN)---+ Router B + 
+----+       +--------+      +----------+             +----------+  

Where on link A Customer may either send tagged frames with arbitrary VLAN-ID or untagged frames.
On Link B frames are outer tagged with S-Tag.
I am not even worrying about the L2VPN part.

In lab I send tagged frames to EX4200. The port facing CE is configured as access port with vlan member designated S-Tag

set interfaces ge-0/0/22 unit 0 family ethernet-switching port-mode access

set interfaces ge-0/0/22 unit 0 family ethernet-switching vlan members qinq

vlan qinq is configured like this:

set vlans qinq vlan-id 100
set vlans qinq dot1q-tunneling customer-vlans native
set vlans qinq dot1q-tunneling customer-vlans 1-4094
set ethernet-switching-options dot1q-tunneling ether-type 0x8100

Trunk towards router:

set interfaces xe-0/1/0 unit 0 family ethernet-switching port-mode trunk
set interfaces xe-0/1/0 unit 0 family ethernet-switching vlan members qinq

To test IP connectivity I send ping from CE to Router A. If I send untagged frames I get IP connectivity. Once I send tagged frames towards EX4200 there’s no packets going out on either interfaces.

What am I missing?