SIP on FTTH systems

Mikael Abrahamsson swmike at
Thu Feb 6 12:15:57 UTC 2014

On Thu, 6 Feb 2014, Mark Tinka wrote:

> There are, typically, three topology models for modern FTTH
> (wireline, really) networks that a service provider could
> deploy:
> 	1. SVLAN N:1 model
> 	2. CVLAN 1:1 model
> 	3. Hybrid of both

There are more. There are models where each ISP gets its own customer vlan 
and L2 equipment do inspection of ARP/ND and does security filtering on 
L2/L3 using this information. There are also L3 networks where the traffic 
is source-routed out to the correct ISP, or each ISP gets its own VRF in 
the equipment and it's VRF a long way out.

To the original poster. People using PPPoE for FTTH makes me sad. When 
someone suggests this, please just say "go back to the drawingboard, redo 
it right".

Mikael Abrahamsson    email: swmike at

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