dhcpcd-discuss

Hi Matt

On 25/04/2019 04:10, Matt Horan wrote:
> On Wed, Apr 24, 2019 at 10:03:05PM -0400, Matt Horan wrote:
> > I just upgraded from OpenBSD 6.4 to 6.5 and subsequently upgraded dhcpcd
> > from 7.0.8 to 7.1.1. After the upgrade, and before upgrading dhcpcd,
> > dhcpcd successfully obtained an IPv6 lease (via DHCPv6-PD). However,
> > after upgrading dhcpcd and rebooting, the first attempt of dhcpcd to
> > obtain a lease fails with dhcpcd[11920]: timed out.
>
> This looks to be entirely my fault. I had set up my /etc/dhcpcd.conf
> with the following:
>
> noipv6rs
> interface em0
>      ipv6rs
>      ia_pd 0 em1/0
>
> and had inet6 autoconf in /etc/hostname.em0.
>
> This had worked fine for me for some time, but it seems that this
> configuration causes "carrier lost" and the subsequent behavior above.
>
> It seems that this is not a recommended configuration anyway, so I've
> changed my configuration to let dhcpcd handle everything.
>
> Replacing /etc/dhcpcd.conf with the following resolves this issue:
>
> noipv6rs
> interface em0
>      ipv6rs
>      ia_na 1
>      ia_pd 0 em1/0

Well, dhcpcd is meant to handle everything.
But if you want to continue using slaacd or something else that causes a 
PHY reset (which can trigger carrier loss) you still can!

Send dhcpcd right to the background with the -b flag OR start it in 
master mode (ie don't specify an interface on the command line) and use 
the allowinterfaces directive instead to limit the interfaces dhcpcd uses.

Roy