[GTALUG] Linux Kernel Allows 0.0.0.0/8 as a Valid Address Range

[Val Kulkov]

On Thu, 15 Aug 2019 at 23:19, D. Hugh Redelmeier via talk
<talk at gtalug.org> wrote:
>
> | From: Val Kulkov via talk <talk at gtalug.org>
>
> | While seemingly promoting adoption of IPv6 Google refuses to implement
> | DHCPv6 in Android OS. See this article:
> | https://www.techrepublic.com/article/androids-lack-of-dhcpv6-support-frustrates-enterprise-network-admins/
>
> What's wrong with the recommendations of RFC 7934?
>
> I ask in naively since all I've done is quickly read it.

RFC 7934 recommends "best practices", which include assignment of
multiple IPv6 addresses to a host. This includes both stateless and
stateful IPv6 addresses. In other words, RFC 7934 does not prohibit
stateful IPv6 addresses.

The point here is that Google's Android does not support stateful IPv6
addresses. If your network environment requires stateful IPv6
addresses and you have an Android device, you are SOL. There are use
cases where stateful IPv6 may be useful or even necessary, but IMO
this is a topic for another discussion.

At present, network admins who need to support Android devices on
their IPv6-enabled networks are stuck with SLAAC.