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

[Mikael Abrahamsson]

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).

> 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.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se