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dhcpd not delivering all options

 
 
ckm070@yahoo.com
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      05-02-2005, 06:21 PM
Hi all,

I am building Linux based server to boot bunch of diskless workstations
that are supposed to run different OSs. I run ISC DHCP server v3.0.2 on
SuSE 9.1. The problem is that clients do not get all the options that
intended to be delivered to them. To investigate this issues, I have
created the following dhcpd.conf.

deny unknown-clients;

#
# I have also tried to define user options like this:
#
# option diskless-root-path code 180 = string;
# option diskless-root-path "/export/root/i386qnx";
#
# and did not see anything in dhcpcd-test's output???
#

option space NAS;
option NAS.root-path code 1 = string;
option NAS.exec-path code 2 = string;
option NAS.tmp-path code 3 = string;
option NAS.var-path code 4 = string;

ddns-update-style none;
option subnet-mask 255.255.255.0;
default-lease-time 3600;

subnet 203.8.22.0 netmask 255.255.255.0 {
option routers 203.8.22.254;
next-server 203.8.22.199;
}

group {
vendor-option-space NAS;

host local-host {
hardware ethernet 00:60:b0:fb:a9:3c;
fixed-address 203.8.22.199;
filename "pxegrub";
option NAS.root-path "/export/root/i386qnx";
option NAS.exec-path "/export/exec/i386qnx";
option NAS.tmp-path "/export/clients/tmp";
option NAS.var-path "/export/clients/var";
}
}

Then I run 'dhcpcd-test eth0' to display what the client gets. And
seeing the following:

# dhcpcd-test eth0
dhcpcd: MAC address = 00:60:b0:fb:a9:3c
IPADDR=203.8.22.199
NETMASK=255.255.255.0
NETWORK=203.8.22.0
BROADCAST=203.8.22.255
GATEWAY=203.8.22.254
DNS=203.8.22.199
DHCPSID=203.8.22.199
DHCPGIADDR=0.0.0.0
DHCPSIADDR=203.8.22.199
DHCPCHADDR=00:60:B0:FB:A9:3C
DHCPSHADDR=00:60:B0:FB:A9:3C
DHCPSNAME=''
LEASETIME=86400
RENEWALTIME=43200
REBINDTIME=75600
INTERFACE='eth0'
CLASSID='Linux 2.6.4-52-smp i686'
CLIENTID=00:60:B0:FB:A9:3C

Isn't dhcpd supposed to deliver all known options to client? Am I doing
anything wrong? Please advise.

Thanks,
ckm070

 
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Horst Knobloch
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      05-02-2005, 08:46 PM
(E-Mail Removed) <(E-Mail Removed)> wrote:


[ISC DHCP server v3.0.2 on SuSE 9.1]
> The problem is that clients do not get all the options that
> intended to be delivered to them. To investigate this issues, I have
> created the following dhcpd.conf.


[DHCP conf]

> Then I run 'dhcpcd-test eth0' to display what the client gets. And
> seeing the following:
>
> # dhcpcd-test eth0
> dhcpcd: MAC address = 00:60:b0:fb:a9:3c
> IPADDR=203.8.22.199
> NETMASK=255.255.255.0
> NETWORK=203.8.22.0
> BROADCAST=203.8.22.255
> GATEWAY=203.8.22.254
> DNS=203.8.22.199

....
> Isn't dhcpd supposed to deliver all known options to client? Am I doing
> anything wrong? Please advise.


Fire up ethereal and capture the DHCP traffic. Inspect the
DHCP request (option 55) and check whether the client asks for
the other options. If client does not, reconfigure your DHCP
clients to do so.

HTH

Ciao, Horst
--
»When pings go wrong (It hurts me too)« E.Clapton/E.James/P.Tscharn
 
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