[j-nsp] VPLS q-in-q

[Baldur Norddahl]

Hello

I am trying to enable transport of q-in-q double tagged frames over VPLS 
through our MX204. The remote end is a switch of another brand (ZTE) and 
it has some limitations. The outer vlan tag is not transported so I need 
the MX204 to add it back before processing. However I can not figure out 
how to do this.

My test configuration:

baldur at formervangen-edge1# show routing-instances poi-formervangen | 
display inheritance brief
protocols {
     vpls {
         ## 'ethernet-vlan' was inherited from group 'POI-VPLS'
         encapsulation-type ethernet-vlan;
         ## 'no-control-word' was inherited from group 'POI-VPLS'
         no-control-word;
         ## 'mac-statistics' was inherited from group 'POI-VPLS'
         mac-statistics;
         mesh-group 1 {
             vpls-id 424;
             neighbor 10.9.124.0;
         }
     }
}
## 'vpls' was inherited from group 'POI-VPLS'
instance-type vpls;
vlan-id 424;
interface xe-0/1/7.424;

baldur at formervangen-edge1# show interfaces xe-0/1/7
flexible-vlan-tagging;
native-vlan-id 424;
encapsulation flexible-ethernet-services;
unit 424 {
     encapsulation vlan-vpls;
     vlan-id 424;
}

I have a client injecting some traffic on the remote switch using outer 
vlan 424 and inner vlan 201. Remember outer vlan is not transported, so 
the L2VPN would only receive single tagged frames with vlan 201. I need 
the MX204 to add outer vlan 424 and transmit packets with outer vlan 424 
and inner vlan on interface xe-0/1/7. But instead I get this:

11:10:02.303264 00:22:07:4d:7b:0d > ff:ff:ff:ff:ff:ff, ethertype 802.1Q 
(0x8100), length 346: vlan 201, p 0, ethertype IPv4, 0.0.0.0.68 > 
255.255.255.255.67: BOOTP/DHCP, Request from 00:22:07:4d:7b:0d, length 300

This is a tcpdump on a Linux server. Vlan 424 is not added and we just 
get singled tagged vlan 201 packets :-(.

I have tried all sort of combinations including input and 
output-vlan-map but with no success. Anyone have some pointers on how to 
accomplish this?

Thanks,

Baldur