Question

commandline refresh dhcp address

Asked by: prof666

I have suse 9.3 installed on my laptop (Dell D500) and am using Kwifimanager to configure the WLAN's. This works correctly and will connect to various WLANS depending upon which config I activate. However the dhcp client for the wireless connection will not retreve a IP address without me going into the network card setup in YaST and entering all the details. Kwifimanager will fill in the wifi settings on the YaST network page upon activation (as it should do), however the dhcp does not refresh.
Is there a way via the commandline I can force the connection on eth1 (my wireless card) to poll for a new address. I intend to add this command as a post connection script in Kwifimanger, so everytime I activate a new config it will force a refresh (which should sort this problem).

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Asked On
2005-06-21 at 03:44:25ID21465240
Tags

refresh

,

dhcp

,

ip

,

address

Topics

Linux Networking

,

Wireless Local Area Network

Participating Experts
2
Points
250
Comments
11

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Answers

 

by: rindiPosted on 2005-06-21 at 05:24:40ID: 14265207

try

ifconfig wlan0 down
ifconfig wlan0 up

 

by: paranoidcookiePosted on 2005-06-21 at 11:28:15ID: 14268854

alternativly

dhclient eth0 (replace with whatever your netcard is called)

 

by: prof666Posted on 2005-06-21 at 13:34:21ID: 14270085

suse does not include dhclient, and using ifconfig doesn't work either.

 

by: rindiPosted on 2005-06-21 at 14:21:32ID: 14270674

try ifconfig eth1 down and up, out of habbit I entered wlan0...

 

by: prof666Posted on 2005-06-21 at 14:54:07ID: 14270935

using ifconfig down then ifconfig up doesn't seem to start the renew process.

 

by: rindiPosted on 2005-06-21 at 15:10:02ID: 14271034

what about dhcpd? Can you check which client SuSE uses? look in /sbin for something starting with dhc..... and then when you have the name, use

man dhc.....

to get some info and the correct syntax.

 

by: paranoidcookiePosted on 2005-06-21 at 15:42:52ID: 14271237

My SuSE 9.1 box definatly has got dhclient are you sure your paths are correctly set up, you are running as root I take it?

try
su
/sbin/dhclient

If not maybe install it from yast

 

by: prof666Posted on 2005-06-22 at 02:22:28ID: 14273499

ive got ifup-dhcp & ifdown-dhcp.

This starts a dhcp cleint on an adapter ie: ifup-dhcp eth1

but this still doesn't seem to grab an IP address. The DHCP server is a belkin wireless router, but i may turn it off and use my SuSE 9.2 server to act as the DHCP instead to see if it's a compatibility issue with the belkin dhcp server.

 

by: rindiPosted on 2005-06-22 at 02:48:44ID: 14273616

ifup-dhcp & ifdown-dhcp is just a script, but not your dhcp client. Look for the client program itself in your /sbin folder, or try /sbin/dhclient as has been suggested by cookie above.

 

by: prof666Posted on 2005-06-22 at 04:13:31ID: 14273971

Ok found the problem.

A new "feature" of the SuSE9.3 firewall (over previous versions) is that you have to explicitly allow DHCP client requests out for the "external interfaces", which includes wireless devices. With this set, I get an IP address no problems. Will split points between all posters...many thx.

 

by: rindiPosted on 2005-06-22 at 04:28:53ID: 14274051

Thanks too.

20120131-EE-VQP-002

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