Double DHCPDISCOVER ends with DHCPNAK

Fri Mar 4 13:19:10 UTC 2011

In your logs the client is getting the address 192.1.3.191, but there is 
no definition for that range or subnet in the dhcpd.conf you posted. 
Perhaps that is just a cut and paste error?

I don't know for sure but perhaps ubuntu does not like some of the dhcp 
options being sent in the second boot stage?

Usually PXE options can be set in a class so they are only sent during 
the PXE boot. Here's the settings I use:

# PXE boots for jumpstarting x86 boxes
class "PXE" {
   match if substring(option vendor-class-identifier, 0, 9) = "PXEClient";
   option root-path "ltsp-mgc.mgc.es:/opt/ltsp/i386";
   next-server ltsp-mgc.mgc.es;
   filename "/ltsp/i386/pxelinux.0";
}

Thus when the boot request contains the PXEclient vendor class 
identifier the PXE options will be set, and they will not be set in the 
second boot stage.

If this does not help you will need to use tcpdump to capture the 
packets to see what options are set.

regards,
-glenn

On 03/04/11 23:41, Miquel Mauri wrote:
> This are my dhcpd.conf relevant lines:
>
> authoritative;
> server-identifier galaxia.mgc.es;
> option time-servers cosmos.mgc.es;
> ddns-updates false;
> ddns-update-style none;
> option root-path "ltsp-mgc.mgc.es:/opt/ltsp/i386";
> next-server ltsp-mgc.mgc.es;
> filename "/ltsp/i386/pxelinux.0";
> shared-network mutua {
> subnet 192.1.0.0 netmask 255.255.248.0 {
> option nntp-server 192.1.1.253;
> range 192.1.1.161 192.1.1.180;
> range 192.1.2.1 192.1.7.254;
> option broadcast-address 192.1.7.255;
> option subnet-mask 255.255.248.0;
> option routers 192.1.1.249;
> option domain-name-servers 192.1.1.252, 192.168.48.251;
> option domain-name "mgc.es";
> default-lease-time 3600;
> max-lease-time 3600;
> }
> }
> host il-mfont { hardware ethernet 00:11:2f:b9:7b:b9; fixed-address
> 192.1.1.101;}
> host il-apinyol { hardware ethernet 00:13:d4:e8:69:19; fixed-address
> 192.1.1.102;}
> host il-garita { hardware ethernet 00:07:95:c7:8a:2f; fixed-address
> 192.1.1.103;}
> host il-pmoreno { hardware ethernet 00:0a:5e:4b:2d:8c; fixed-address
> 192.1.1.104;}
> host il-taulell-3 { hardware ethernet 00:0a:5e:4f:d9:0b; fixed-address
> 192.1.1.105;}
> host il-acarol { hardware ethernet 00:13:d4:e8:69:09; fixed-address
> 192.1.1.106;}
> host il-mlacruz { hardware ethernet 00:04:75:b4:de:bc; fixed-address
> 192.1.1.107;}
> host il-nbadenas { hardware ethernet 00:0a:5e:58:6a:57; fixed-address
> 192.1.1.108;}
> host il-mmasabe { hardware ethernet 00:0a:5e:1d:68:e1; fixed-address
> 192.1.1.109;}
> host il-emartin { hardware ethernet 00:0a:5e:58:6a:03; fixed-address
> 192.1.1.110;}
> host il-jcavalieri { hardware ethernet 00:13:d4:e8:69:6d; fixed-address
> 192.1.1.111;}
> host il-jgarcia { hardware ethernet 00:13:f7:54:f5:df; fixed-address
> 192.1.1.112;}
> host il-smartinpo { hardware ethernet 00:13:f7:66:b5:28; fixed-address
> 192.1.1.113;}
> host il-rmartos { hardware ethernet 00:0a:5e:5e:1e:a7; fixed-address
> 192.1.1.114;}
> host il-nbeltran { hardware ethernet 00:13:f7:d1:a1:8e; fixed-address
> 192.1.1.115;}
> host il-cjosa { hardware ethernet 00:0a:5e:4c:da:fc; fixed-address
> 192.1.1.116;}
>
> Thanks,
> Miquel.
>
> El dv 04 de 03 de 2011 a les 23:27 +1100, en/na Glenn Satchell va escriure:
>> Please post your dhcpd.conf, or if it is a very big file then the
>> relevant bits (global declarations, classes, the subnet and any host
>> statements for that client). We can't tell what the problem is with only
>> the logs.
>>
>> regards,
>> -glenn
>>
>> On 03/04/11 21:48, Miquel Mauri wrote:
>> >  Somebody can help me?
>> >
>> >  I don't know why this occurs.
>> >
>> >  Thanks,
>> >  Miquel.
>> >
>> >  El dj 03 de 03 de 2011 a les 13:04 +0100, en/na Miquel Mauri va
>> >  escriure:
>> >>  Hello,
>> >>
>> >>  We boot machines over network with TFTP and after the image is
>> >>  downloaded it starts Ubuntu.
>> >>  The problem comes with the DHCPDISCOVER requested in Ubuntu start. The
>> >>  server offers the
>> >>  same IP offered before, but when the client requests this IP the
>> >>  server tells that is not available
>> >>  and the client machine never starts. The server runs 4.1.1-P1 on
>> >>  Debian 6.
>> >>
>> >>  This are the syslog messages:
>> >>
>> >>  Mar  3 12:51:01 galaxia dhcpd: DHCPDISCOVER from 00:50:56:97:6d:a8 via
>> >>  eth0
>> >>  Mar  3 12:51:02 galaxia dhcpd: DHCPOFFER on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:03 galaxia dhcpd: DHCPREQUEST for 192.1.3.191
>> >>  (192.1.1.240) from 00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:03 galaxia dhcpd: DHCPACK on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:12 galaxia dhcpd: DHCPDISCOVER from 00:50:56:97:6d:a8 via
>> >>  eth0
>> >>  Mar  3 12:51:12 galaxia dhcpd: DHCPOFFER on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:12 galaxia dhcpd: DHCPREQUEST for 192.1.3.191
>> >>  (192.1.1.240) from 00:50:56:97:6d:a8 via eth0: lease 192.1.3.191
>> >>  unavailable.
>> >>  Mar  3 12:51:12 galaxia dhcpd: DHCPNAK on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:16 galaxia dhcpd: DHCPDISCOVER from 00:50:56:97:6d:a8 via
>> >>  eth0
>> >>  Mar  3 12:51:16 galaxia dhcpd: DHCPOFFER on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:16 galaxia dhcpd: DHCPREQUEST for 192.1.3.191
>> >>  (192.1.1.240) from 00:50:56:97:6d:a8 via eth0: lease 192.1.3.191
>> >>  unavailable.
>> >>  Mar  3 12:51:16 galaxia dhcpd: DHCPNAK on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:19 galaxia dhcpd: DHCPDISCOVER from 00:50:56:97:6d:a8 via
>> >>  eth0
>> >>  Mar  3 12:51:19 galaxia dhcpd: DHCPOFFER on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:19 galaxia dhcpd: DHCPREQUEST for 192.1.3.191
>> >>  (192.1.1.240) from 00:50:56:97:6d:a8 via eth0: lease 192.1.3.191
>> >>  unavailable.
>> >>  Mar  3 12:51:19 galaxia dhcpd: DHCPNAK on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>  Mar  3 12:51:22 galaxia dhcpd: DHCPDISCOVER from 00:50:56:97:6d:a8 via
>> >>  eth0
>> >>  Mar  3 12:51:22 galaxia dhcpd: DHCPOFFER on 192.1.3.191 to
>> >>  00:50:56:97:6d:a8 via eth0
>> >>
>> >>  Thanks in advance,
>> >>  Miquel.
>> >>