nanog mailing list archives

Re: Android (lack of) support for DHCPv6


From: Lorenzo Colitti <lorenzo () colitti com>
Date: Wed, 10 Jun 2015 15:43:32 +0900

On Wed, Jun 10, 2015 at 2:36 PM, Hugo Slabbert <hugo () slabnet com> wrote:

Pardon my ignorance as I don't currently have field experience with
464xlat, but my understanding of the technique is that it is (for the most
part) dependent on the network cooperating (by providing a DNS64 and NAT64)
for it to work properly.


My point was not "on a SLAAC network, it's possible to implement 464xlat".
It was, "on a one-address-per-device network, it's impossible to support
464xlat".

Here, 464xlat is just an example of a new technology that needs a separate
IP address in order to function. There are other current examples, and
unless we get stuck in a one-address-per-device word, there will be future
examples too.

Multiple posters on the bug/request are coming from enterprise/campus
networks that have existing AUPs and enforcement techniques prohibiting
certain network functions (e.g.  content filtering, restricted outbound
access, etc.), and would be making an *active choice* as to whether they do
or do not want to support functions such as tethering, 464xlat, etc.


Sure, but today, it is not common practice for networks to prohibit a
device from tethering or from using IPv4-only applications on user-managed
devices. From a user's point of view, going to a world where such things
are prohibited is a regression.

And there it is:  "SLAAC is better and it isn't that hard; use it
instead."  It is up to the network operator to make the design choices that
best fit their network, including if their design goals are to *restrict*
certain network functions.  You are saying that you know better.


I don't think that's a useful argument to make, since you are also saying
that you know better.


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