Renew IP from DHCP

Hi,

how can I renew my IP address of my linux PC from the DHCP server? I know I
can do a ifconfig eth0 down (and up) but that way I don't get any
messages. I have the problem that sometimes my Linux PC doesn't get an IP
from my DHCP server (build in in router). I would like to see some error
message when trying to get the IP. Something like the windows
ipconfig /renew.

Thanks!

On 08/28/2007 08:45 AM, Hugo wrote:
> Hi,
>
> how can I renew my IP address of my linux PC from the DHCP server? I know I
> can do a ifconfig eth0 down (and up) but that way I don't get any
> messages. I have the problem that sometimes my Linux PC doesn't get an IP
> from my DHCP server (build in in router). I would like to see some error
> message when trying to get the IP. Something like the windows
> ipconfig /renew.

Hum, my crystal ball has failed to guess as to what distro are you
using; on Debian/Ubuntu machines all you have to do is append/add the
following lines in /etc/network/interfaces:

auto eth0
iface eth0 dhcp

try 'man interfaces' for further details.

and use 'ifup eth0' or 'ifdown eth0' instead of the ifconfig.

To find/see error messages either use xconsole or search log files in
your /var/log directory; the /var/log/syslog and, or /var/log/messages
are good candidates, all these may contain or not depends on version
your syslog daemon and its configuration.

I have not tested, but almost all the Unix/Linux commands can also be
run in verbose mode; do read the manpage for all those commands which
you want to use and, or master.

PS: I could also have explained, how to do that on a Fedora/Redhat and
Gentoo or even the FreeBSD, but leaving that for you as an exercise

Hints: dhclient and pump

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"If you have time to waste, please waste it somewhere else, not here."

Usually I do (quick & dirty):

* kill any old dhclient for that interface
* run dhclient ethX

I sometimes forgot the kill which didnt seem to have any negative
effects though I wont recommend it here.

Henning

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Henning Hasemann <(E-Mail Removed)> wrote:
> Usually I do (quick & dirty):
>
> * kill any old dhclient for that interface
> * run dhclient ethX

Out of interest can you just:
dhclient -r
dhclient eth0

or is it necessary to kill the client?

Mark.

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Birmingham
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> Out of interest can you just:
> dhclient -r
> dhclient eth0

I guess so, I didnt know -r nor did I read dhclients manpage up to
now

Henning

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On 08/28/2007 03:07 PM, Henning Hasemann wrote:
>> Out of interest can you just:
>> dhclient -r
>> dhclient eth0
>
> I guess so, I didnt know -r nor did I read dhclients manpage up to
> now

Do you think, anyone of us contributing something creative by providing
silly answers to a silly question?

IMHO, neither the Usenet is a chat room nor a training session, please,
please don't waste your and, or others time and resources.

Let the OP do his/her homework, the problem in his/her question has
nothing to do with *Linux Networking* and, or COLN.

--
Dr Balwinder S "bsd" Dheeman Registered Linux User: #229709
Anu'z Linux@HOME Machines: #168573, 170593, 259192
Chandigarh, UT, 160062, India Gentoo, Fedora, Debian/FreeBSD/XP
Home: http://cto.homelinux.net/~bsd/ Visit: http://counter.li.org/