dhclient(8) sets wrong interface netmask on boot up

[Adam Vande More]

On Fri, Sep 11, 2015 at 10:15 PM, Cary <lists at flederma.us> wrote:

> QUESTION: How do I get dhclient to correctly set the interface netmask
> when the system boots?
>
> Once the system is booted, I cannot SSH into the system until I have
> logged in via the console and restarted dhclient(8) (`service dhclient
> restart em0`).
>
> ACTIONS TAKEN:
> I've installed 10.2-RELEASE[uname] from scratch.
>
> My [/etc/rc.conf] specifies that the em0 interface should have dhclient
> run on it.
>
> Running ifconfig(8) prior (ifconfig-0.out) and post (ifconfig-1.out)
> dhclient, I found that the netmask is set incorrectly after boot:
>
> # ifconfig -a > ifconfig-0.out
> # service dhclient restart em0
> Stopping dhclient.
> Starting dhclient.
> DHCPREQUEST on em0 to 255.255.255.255 port 67
> DHCPACK from 192.168.20.1
> bound to 192.168.20.166 -- renewal in 43200 seconds.
> # ifconfig -a > ifconfig-1.out
> # diff ifconfig-0.out ifconfig-1.out
> 4c4
> <       inet 192.168.20.166 netmask 0xffffffff broadcast 192.168.20.166
> ---
> >       inet 192.168.20.166 netmask 0xffffff00 broadcast 192.168.20.255
>
> My [/etc/dhclient.conf] file is unchanged from the system default.
>
> The DHCP server is an residential wireless router. All other devices are
> receiving DHCP configurations from the router without issue.
>
> Thank you in advance for any assistance!
>

Nothing you've given us would lead me to believe this is an issue with
dhclient.  Why do you?  It simply assigns whatever info it gets from DHCP.


> [uname] FreeBSD public.fbsd.local 10.2-RELEASE FreeBSD 10.2-RELEASE #0
> r286666: Wed Aug 12 15:26:37 UTC 2015
> root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
>
> [/etc/rc.conf]
> hostname="public.fbsd.local"
> ifconfig_em0="DHCP"
> cloned_interfaces="${cloned_interfaces} lo1"
>

previous line doesn't make much sense.


> sshd_enable="YES"
>


-- 
Adam