[e-nsp] Summit/Alpine - ExtremeWare and QinQ

[Marcin Kuczera]

Mikael Abrahamsson wrote:
> On Wed, 4 Mar 2009, Marcin Kuczera wrote:
> 
>> could you tell me how is the QinQ working in Summit5i/Alpine switches ?
>> I see almost no documentation about that (or maybe I use wrong keyword 
>> for searching).
>> As I understood, I have to enable JumboFrames, then I consider using 
>> still 0x8100 ethertype, so, the switch as I suppos will relay QinQ 
>> transparently..
>> (correct me if I'am wrong)
> 
> If you keep 0x8100, the switch will relay already tagged QinQ, but it 
> can't untag (it'll only see the outer tag).

ok, perfect (at this stage)

>> But, how can I terminate QinQ internal VLAN on untagged port ?
> 
> You can't. i-chipset equipment can have it's ethertype changed (vman) 
> but this isn't really QinQ as seen on most other providers.

is there any other method to make it ?
Or its impossible on Summit5i/Alpine at all ?

I feel like these switches can not use 2 ethertypes paralelly..

What I want to do one day is to connect RedBack BRAS via Extreme "core" 
to edge devices (Dlin DES-3028) that will terminate QinQ circuits on 
physical ports, so that every subscribers will have it's own QinQ vlan 
towards BRAS.

Marcin