[c-nsp] terminating double tagged vlans on ASR1000

[Christian Schmit]

Hello,
We need to terminate a lot of double tagged vlans on ASR1K devices 
(ASR1006/ESP20)to provide pppoe/dhcp connectivity.
Currently we work with sub-interfaces but as it is difficult to manage and 
maintain thousands of sub-interfaces we are looking for a better way to 
implement this.
In our case the outer vlan is ambiguous while the inner vlan defines the 
service.The problem is that normal sub-interfaces do not support ambiguous 
outer vlans.
Using EVC, we can match ambiguous outer vlans but in order to map them to a 
layer3 interface (BDI interface) we need to pop the vlans, however "rewrite 
ingres tag pop 2 symmetric"is not supported on ambiguous vlans.
Is there any way on the ASR1000 to match ambiguous outer vlans and to 
terminate them for pppoe/dhcp services without having to create thousands 
of sub-interfaces?
Will ambiguous outer tag vlans be supported on normal sub-interfaces in a 
future release?
Christian