Very Computer

by **Douglas Coo** » Thu, 16 Dec 1999 04:00:00

How do I get DHCP installed? I can run it manually, but I would like it to
run automatically on boot. Where is the appropriate place to put the
command to run dhclient? I can't find any switches to enable DHCP in
rc.conf, although there are parameters for options and the path.

Related question: If I'm running DHCP, I still want to set my computer's
name, but the fully qualified domain name depends on what domain the
computer is attached to. How do I just specify the computer's name, and let
the DHCP supply the rest of the FQDN?

Thanks!

--

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Douglas Cook - MCP, CS Student at BYU

Earth first! We'll destroy the other planets later...

by **Paul Southwor** » Fri, 17 Dec 1999 04:00:00

>How do I get DHCP installed? I can run it manually, but I would like it to
>run automatically on boot. Where is the appropriate place to put the
>command to run dhclient? I can't find any switches to enable DHCP in
>rc.conf, although there are parameters for options and the path.

In /etc/rc.conf, let's say your interface is "xl0" - you would do:

ifconfig_xl0="DHCP"

You should be able to remove the defaultrouter="..." entry as well.

Quote:>Related question: If I'm running DHCP, I still want to set my computer's
>name, but the fully qualified domain name depends on what domain the
>computer is attached to. How do I just specify the computer's name, and let
>the DHCP supply the rest of the FQDN?

If your unqualified hostname is "foo", you can do (in /etc/rc.conf):

hostname="foo"

DHCP won't fully qualify it, but it should (depending on what info
the DHCP server offers) build an /etc/resolv.conf file which has
the qualifying domain in the 'search' path. Generally that is
good enough.

--Paul

by **Nicolai van der Smag** » Thu, 30 Dec 1999 04:00:00

Simply by adding "dhclient [your network interface device]" to rc.local, where
[] is ed0 or ep0 or whatever applies to your setup.

> How do I get DHCP installed? I can run it manually, but I would like it to
> run automatically on boot. Where is the appropriate place to put the
> command to run dhclient? I can't find any switches to enable DHCP in
> rc.conf, although there are parameters for options and the path.

> Related question: If I'm running DHCP, I still want to set my computer's
> name, but the fully qualified domain name depends on what domain the
> computer is attached to. How do I just specify the computer's name, and let
> the DHCP supply the rest of the FQDN?

> Thanks!

> --

> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Douglas Cook - MCP, CS Student at BYU

> Earth first! We'll destroy the other planets later...

by **Donn Mille** » Thu, 30 Dec 1999 04:00:00

Quote:> Simply by adding "dhclient [your network interface device]" to rc.local, where
> [] is ed0 or ep0 or whatever applies to your setup.

Don't know if that's necessary - you can set this in /etc/rc.conf. Here's
an example of my /etc/rc.conf:

network_interfaces="lo0 ed0"
ifconfig_ed0="dhcp"

Of course, check out /etc/defaults/rc.conf, and replace "ed0" with your
own interface (if it's different).

I've also created a shell script to set my hostname which was set by DHCP
on boot-up:

#!/bin/sh
# I put this in /usr/local/sbin/sethostname

IP=`ifconfig ed0 | awk '/inet/ {print $2}'`
HOST=`nslookup $IP| awk '/Name:/ {print $2}'`

hostname $HOST

You could reference this in /etc/rc.local:

$ cat /etc/rc.local

#!/bin/sh
if [ -f /usr/local/sbin/sethostname ] ; then
/usr/local/sbin/sethostname
fi

- Donn