[c-nsp] ASR-901 EoMPLS qinq

[Divo Zito]

 Hello,

I need to transport some double-tagged customers from SiteA to SiteB
through a GbE link and to rewrite S-VLANs so that those I use on the
aggregation-side interface are different from those I receive on the
customer facing port.

customers                                              aggregation
(S-VLAN, C-VLAN)                                  (S-VLAN, C-VLAN)

(10,100-199)\                                        /(20,100-199)
(11,100-199) -- [ A901-siteA ] ---- [ A901-siteB ] -- (21,100-199)
(12,100-199)/                                        \(22,100-199)

I was considering to use ASR-901s with EVC xconnect, something similar
to the following config...

Site-A:

interface GigabitEthernet0/1
 description Customer facing port
 service instance 10 ethernet
  encapsulation dot1q 10
  rewrite ingress tag pop 1 symmetric
  xconnect 10.0.0.1 1 encapsulation mpls
 service instance 11 ethernet
  encapsulation dot1q 11
  rewrite ingress tag pop 1 symmetric
  xconnect 10.0.0.1 2 encapsulation mpls
 ...

Site-B:

interface GigabitEthernet0/1
 description Aggregation facing port
 service instance 10 ethernet
  encapsulation dot1q 20
  rewrite ingress tag pop 1 symmetric
  xconnect 10.0.0.2 1 encapsulation mpls
 service instance 11 ethernet
  encapsulation dot1q 21
  rewrite ingress tag pop 1 symmetric
  xconnect 10.0.0.2 2 encapsulation mpls
 ...

... but on the "Configuring EoMPLS" guide [1] I found this:

Restrictions for EoMPLS
- EoMPLS xconnect port with double-tagged encapsulation is not supported

Now I'm wondering whether my idea is really feasible with ASR-901 or not.
If it's not, any hint on which low budget platform can I use? ASR-920?

1]
http://www.cisco.com/c/en/us/td/docs/wireless/asr_901/Configuration/Guide/b_asr901-scg/b_asr901-scg_chapter_010100.html