Date: Thu, 27 Dec 2018 04:42:18 -0800 From: David Wolfskill <david@catwhisker.org> To: freebsd-questions@freebsd.org, freebsd-wireless@freebsd.org Subject: Re: DHCP problems while connecting with a Wifi AP Message-ID: <20181227124218.GT22302@albert.catwhisker.org> In-Reply-To: <20181227122517.GA3208@c720-r314251> References: <20181227122517.GA3208@c720-r314251>
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On Thu, Dec 27, 2018 at 01:25:17PM +0100, Matthias Apitz wrote:
>=20
> Hello,
>=20
> I'm using my (Ubuntu) mobile device as AP to connect my FreeBSD laptop
> to the Internet. While this is working fine most of the times, I
> encounter in some situation problems getting an IP addr with DHCP from
> the mobile. It looks somehow like a race condition between WPA
> associating and DHCP (dhclient) asking to early (and giving up). Here is
> a typical situation when it does not work:
> ...=20
> Any ideas re/ the following question:
>=20
> 1. How could I delay the dhclient until connection is fine?
> 2. Why the BOOTP/DHCP are not logged by the ipfilter?
>=20
> This could smell as a problem caused by the AP, but any other device
> (for example an iPhone) connects fine and gets an IP addr.
>=20
> Thanks
>=20
> matthias
> ....
You might investigate the use of "synchronous_dhclient" in /etc/rc.conf:
synchronous_dhclient
(bool) Set to =E2=80=9CYES=E2=80=9D to start dhclient(8) s=
ynchronously at
startup. This behavior can be overridden on a per-interfa=
ce
basis by replacing the =E2=80=9CDHCP=E2=80=9D keyword in t=
he
ifconfig_=E2=9F=A8interface=E2=9F=A9 variable with =E2=80=
=9CSYNCDHCP=E2=80=9D or
=E2=80=9CNOSYNCDHCP=E2=80=9D.
FWIW, I use 'synchronous_dhclient=3D"YES"' in my laptop's /etc/rc.conf,
(and have done since 2012/01/26 12:39:23).
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
Yes, Mr. Trump, your behavior IS a disgrace -- to put it very nicely.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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