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Re: Finishing deprecation of isc-dhcp-client in ifupdown*



  Hi,

Le 23/10/2025 à 11:25, Daniel Gröber a écrit :
On Wed, Oct 22, 2025 at 08:22:07PM +0200, Thorsten Glaser wrote:
I’ve never seen inet6 auto used anywhere, only inet6 static (and
I’ve not personally encountered inet6 dhcp yet, and given rtadvd
and rtsol work, I don’t quite see the use for most networks).

Strange, given that this is what d-i will produce by default -- if the
installation network has IPv6 RAs at least.

As I've a multi-ISP config, I want to share here a bit of my config,
as an example of unusual config.

For one of my ISP, I've the following config:
iface en-rezine inet6 auto
        dhcp 1
        accept_ra 0

dhcp is required as my ISP only gives me a local-link address
(via DHCP) and also a /48 via prefix delegation (in DHCP),
but do not get any specific IPv6 within the /48 directly
(via SLAAC nor via DHCP)
I ignore RA as I configure a local radvd daemon (I've a multi-ISP config)

I'm using isc-dhcp-client. I hope, but not test, that dhcpcd also
handle prefix delegation correctly.

Also note that I'm a user of the /etc/dhcp/dhclient-enter-hooks.d
interface. Due to the multi-ISP setup, I remove with a script
the default IPv4 route classically added by DHCP for my different ISP.
The routing is manually handled by shorewall config.

  Regards,
    Vincent


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