SIP on FTTH systems

Frank Bulk frnkblk at
Wed Feb 12 04:47:35 UTC 2014

In the scenario you're describing does each PC get its own /64 (or /56 or
/48) directly from the service provider?  Or are they in the same netblock?


-----Original Message-----
From: Anders Löwinger [mailto:anders at] 
Sent: Tuesday, February 11, 2014 6:33 PM
To: Mikael Abrahamsson
Cc: nanog at
Subject: Re: SIP on FTTH systems

On 2014-02-11 23:41, Mikael Abrahamsson wrote:
>> Is there not an issue with this if the customer is connected directly to
>> access device over L2? They will not communicate with each other direcly,
>> all traffic will be exchanged through the default gateway?
> Yes, what's the problem with that?

Bad description by me. I'll try again.

If I have two PCs in my home, connected with GE to a L2 switch and I buy 10 
Mbit Internet access, I don't want traffic between my two PCs to be
through the default route.

They could possible communicate directly using link-local, but I'm not sure 
how they would find each other?

Default gw could send a redirect...

> I'd venture to say that any IPv6 implementation that doesn't support this
> broken and should be fixed by the implementor.



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