Ben,

Short answer - yes; everyone uses simple VLANs for customer separation.

Long answer - yes; MEF have the eNNI spec.  Also IETF have an RFC which many 
people use as a guideline for testing their NNIs (especially if they're not 
fussed about MEF dogma).

http://metroethernetforum.org/Assets/Technical_Specifications/PDF/MEF_26.1.pdf
http://www.ietf.org/rfc/rfc2544.txt

Reading through the lines on your question though:

The problem is that most broadband isn't yet NGA; the vast majority is still 
ADSL.   You're very unlikely to see anyone handing off traditional DSL as 
native Ethernet, because they'll be doing some dark magic voodoo to make it 
happen.  Even the now ubiquitous FTTC (NGA) connections are still transported 
over the 'broadband' network, and handed off as PPP/L2TP (using PPPoE at the 
CPE).  Ethernet handoff is very much possible with NGA, because it's all 
Ethernet under the hood, however at the moment this is sold by the wholesale 
networks as a premium business product.  I suppose there's no appetite for 
domestic NGA to be handed off as Ethernet - probably because the infrastructure 
involved in transporting it natively is more costly.

On our Wholesale Ethernet service (yes, we do Wholesale Ethernet!), we deliver 
NGA in a way that pretty much matches the ALA spec, we just haven't 
specifically made the effort to comply.  Honestly, we're more interested in 
becoming MEF compliant than following the ALA spec.  MEF covers all things 
Ethernet (giving us a 'carrier-grade' badge), whereas ALA only really covers 
'broadband' technologies (FTTC/P/PON).    <SHAMELESS PLUG> So if you want 
access to the entire UK NGA footprint on an Ethernet handoff that looks a lot 
like an ALA spec NNI, give us a call! </SHAMELESS PLUG>

C

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Charlie Boisseau

Fluency Communications Ltd.
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On 11 Sep 2013, at 16:30, Ben Ward 
<[email protected]<mailto:[email protected]>> wrote:

Thanks Neil,

Is there a particular wholesale interconnect method that people have settled on 
where L2TP isn't the preferred option?

Ben


On 6 September 2013 16:47, Neil J. McRae 
<[email protected]<mailto:[email protected]>> wrote:
I don't think anyone is using it.

On 06/09/2013 12:06, "Ben Ward" 
<[email protected]<mailto:[email protected]>> wrote:

Hi all,

Has anyone implemented the NICC's ALA architecture in the UK?
http://www.niccstandards.org.uk/publications/ala.cfm

Given that the PPP/L2TP handoffs are so well defined it's tempting to use them, 
but using VLANs seems to be the future. ALA looks like a solution, but I've yet 
to hear anyone mention it in production.

Any views in the UKNOF community? (har!)

Ben

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[email protected]<mailto:[email protected]> | 
http://www.crouchingbadger.com<http://www.crouchingbadger.com/>



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