Re: [v6ops] Need ref to 3GPP spec for the use of DHCPv6 Prefix Delegation, e.g. for smartphone tethering

Mikael Abrahamsson <swmike@swm.pp.se> Mon, 07 October 2013 08:33 UTC

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Date: Mon, 07 Oct 2013 10:33:35 +0200
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Alexandru Petrescu <alexandru.petrescu@gmail.com>
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Subject: Re: [v6ops] Need ref to 3GPP spec for the use of DHCPv6 Prefix Delegation, e.g. for smartphone tethering
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On Mon, 7 Oct 2013, Alexandru Petrescu wrote:

> Hello,
>
> I need a reference to a 3GPP spec which requires or explains the use of
> DHCPv6 Prefix Delegation for smartphone tethering (mobile hotspot).
>
> This is because we write a problem statement draft in DHC WG ""Route
> Problem at Relay during DHCPv6 Prefix Delegation".
>
> I would like that draft to reflect the problem not only in the
> homenet-kind of deployments (DSL, broadband forum) but also smartphone
> deployments.

http://www.3gpp.org/ftp/Specs/html-info/23402.htm

If you download the 10.8.0 spec you will find:

"4.7.5	IPv6 Prefix Delegation using S2c
Optionally a single network prefix shorter than a /64 prefix may be 
assigned to a PDN connection (TS 23.401 [4]). When S2c is used to access a 
PDN, the UE acting as a Mobile Router may request delegation of one or 
more IPv6 prefix(es) via DHCPv6 Prefix Delegation signalling as described 
in RFC 6267 [56]. The UE does not need to explicitly register these 
additional prefixes using S2c signaling as implicit mode registration is 
used."


So this is not specific to smartphone tethering, but to any kind of mobile 
device that wants to act as a router.

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