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Re: [v6ops] I-D Action: draft-ietf-v6ops-unique-ipv6-prefix-per-host-07.txt

Mikael Abrahamsson <swmike@swm.pp.se> Fri, 04 August 2017 03:13 UTC

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Date: Fri, 04 Aug 2017 05:12:59 +0200
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: DY Kim <dykim6@gmail.com>
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Subject: Re: [v6ops] I-D Action: draft-ietf-v6ops-unique-ipv6-prefix-per-host-07.txt
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On Fri, 4 Aug 2017, DY Kim wrote:

> At the end of Sec. 4, it reads:
>
> "After the UE/subscriber received the RA, and the associated flags, it
>   will assign itself a 128 bit IPv6 address using SLAAC.  Since the
>   address is composed by the UE/subscriber device itself, it will need
>   to verify that the address is unique on the shared network.  The UE/
>   subscriber will for that purpose, perform Duplicate Address Detection
>   algorithm.  This will occur for each address the UE attempts to
>   utilize on the shared provider managed network.”
>
> Now the each device has a unique prefix, there’d be no chance that 128 bit addresses generated by different devices should collide. Do we need DAD here?

No, we don't.

That is what 
https://tools.ietf.org/html/draft-pioxfolks-6man-pio-exclusive-bit-02 is 
about.

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

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