Hi,
On ubuntu linux, I use dhclient to get IP address.
I add the following statements in the default configuration file (/etc/dhcp3/dhclient.conf)
--------------------------
# DHCP option 125
option option-125 code 125 = string;
send option-125 00:00:0d:e9:26:01:06:30:30
request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, host-name, netbios-name-servers, netbios-scope, option-125;
--------------------------
I use [tcpdump -i eth0 -s 2000 -w /tmp/dhcp.dump &] to dump the dhcp packets. The file is at [http://www.badongo.com/fi
I find:
1. The option-125 data isn't sent .
2. The requests of netbios-name-servers, netbios-scope and option-125 options aren't sent.
I also create a execute file 'dumpenv' in '/etc/dhcp3/dhclient-enter
I expect that I can get a 'variables.txt' in /tmp directory, but I don't find this file.
What shuld I do?
Thank you.
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I try above dhclient.conf at another PC.
It can work without above problem. So I can get variables.txt, and its content contains new_option_125 option. When I delete the dhclient.conf, it tells me
--------------------------
/var/lib/dhcp3/dhclient.le
--------------------------
But it still can work.
I used ISC DHCP Client 3.0.4 version. Now I use ISC DHCP Client 4.1.0a1 version. I meet a problem that I add options in /etc/dhcp3/dhclient.conf. After executing 'dhclient eth0', I find that options I add can't work. Finally, I find:
----------------------
In Client 4.1.0a1 version, the default path of dhclient.conf is /etc/dhclient.conf.
But in ISC DHCP Client 3.0.4 , the default path of dhclient.conf is /etc/dhcp3/dhclient.conf. That is different between 4.1.0a1 and 3.0.4.
----------------------
So I copy /etc/dhcp3/dhclient.conf to /etc/dhclient.conf, and add options into it, the options I add really work.
But I still meet a problem without solving.
I modify the content of 'etc/dhcp3/dhclient-enter-
----------------------
# To enable this script set the following variable to "yes".
RUN = "yes"
----------------------
And I change the access permissions of 'debug' file to '755' (chmod 755 debug).
I copy this file to /etc/dhclient-enter-hooks directory. After executing 'dhclient eth0', I don't find the file 'dhclient-script.debug' in 'tmp' directory. I don't know what the problem is. What shall I do?
Thakn you.
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by: TKDPosted on 2008-02-22 at 01:37:12ID: 20955755
I delete the dhclient.conf in /etc/dhcp3/ directory, and I find the dhclient still CAN work.
Why? If I dont provide the dhclient.conf file, how does dhclient know what to do?