[c-nsp] FTTH access switch

[David Rothera]

Most of ours are terminating on BT 21CN connections and they allocate a Vlan
per circuit, which we then double tag to get vlan traffic into the
customer's VRF back at the gateway end,



On Fri, Dec 3, 2010 at 7:01 AM, Mikael Abrahamsson <swmike at swm.pp.se> wrote:

> On Thu, 2 Dec 2010, Dan Armstrong wrote:
>
>  ... And while were on the topic of ftth, are people tunneling from the cpe
>> to an lns, or statically allocating a vlan per customer?
>>
>
> Neither.
>
> What you do is L2 isolation (and have L3 device to local-proxy-arp) or have
> the L2 switches do L2.5 filtering based on DHCP snooping.
>
> For instance:
>
> <
> http://www.cisco.com/en/US/tech/tk389/tk814/tk841/tsd_technology_support_sub-protocol_home.html
> >
> <
> http://www.cisco.com/en/US/tech/tk389/tk814/tk840/tsd_technology_support_sub-protocol_home.html
> >
>
> This also means you don't need a CPE, the customer can hook up their PC
> directly to the media converter (or in the ETTH+CAT6 case, directly to the
> CAT6 cable).
>
> This has been done for 10 years in some markets. Remember people, every
> time you say LNS or BRAS when you basically just need decent L3 switch
> (because you don't need to tunnel), god kills a kitten.
>
> --
> Mikael Abrahamsson    email: swmike at swm.pp.se
>
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-- 
David Rothera
+44 (0)7584 060207