Re: [v6ops] Please review the No IPv4 draft

[Gert Doering <[e-mail]>]

Hi,

On Mon, Apr 14, 2014 at 04:05:17PM -0400, Simon Perreault wrote:
> Le 2014-04-14 15:48, Gert Doering a écrit :
> >> $ grep "option no-ipv4" /var/db/dhclient6.leases.eth0 && pkill dhclient
> >>
> >> - Is that too hard to implement?
> > 
> > Yes.  My DHCP client is called "dhcpcd".  Nick's might be "pump".
> 
> I'm sorry, I don't see your point.

There are at least 3 different IPv4 DHCP clients on "Unix", and the
author and maintainer of the IPv6 DHCP client that is installed might
not know which IPv4 DHCP client you're using.

So either there is a standard way to communicate this across, as in
"all *IPv4* DHCP clients need to learn that", or it will fail in some
scenarios, no matter what the IPv6 DHCP client maintainers do.

(Also, I'd consider "just kill a foreign process" to be very rude - and
depending on the environment you're doing this in, it will be futile
as well, because a "service manager" of some sort could just report an
error, and restart the "failing" dhclient process).

> >> - Why does that need to be standardized? It would be part of an OS'es
> >> scripts and that usually doesn't get standardized.
> > 
> > Who do you expect to maintain that on the DHCPv6 client side, for all
> > possible combinations with DHCPv4 clients?
> 
> Why would anyone want to maintain that for all combinations of
> implementations?

"To make it work"?

[..]
> > To the contrary.  A network that does not provide IPv4 would want to set
> > that option.  You might just not have public IPv4 here, because it's
> > a zeroconfo network with only IPv4 link-local (169.254) addresses.
> 
> I'm not following your reasoning, sorry.

More bluntly: what makes you think that a network that has no IPv4 has IPv6?

Gert Doering
        -- NetMaster
-- 
have you enabled IPv6 on something today...?

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