Re: Informed regulator about the shorter-than-64 necessity on 3G/4G/5G

Mikael Abrahamsson <swmike@swm.pp.se> Tue, 19 January 2021 18:26 UTC

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Date: Tue, 19 Jan 2021 19:26:50 +0100 (CET)
From: Mikael Abrahamsson <swmike@swm.pp.se>
To: Jan Zorz - Go6 <jan@go6.si>
cc: ipv6@ietf.org
Subject: Re: Informed regulator about the shorter-than-64 necessity on 3G/4G/5G
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On Tue, 19 Jan 2021, Jan Zorz - Go6 wrote:

> There are multiple different things to consider here. First of all, prefix 
> that is assigned to mobile phone is negotiated through PDPv6 establishment 
> procedure and not by DHCPv6. That is mostly set to /64 because different

The prefix is "assigned" by sending RA with /64 PIO A=1 down the PDP 
context. I've seen this done automatically at PDP context activation time, 
but the docs also talk about the UE sending RS and GGSN responding with 
RA.

https://tools.ietf.org/html/rfc7066 section 2.3.

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