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Problem getting DNS server list, no hostname set



Hi,

I'm systematically hiting the message "no DNS servers, can't look up
hostname"  while trying to build a hostname based ks file VM install.

The PXE server used  is a Rhel 5.4 X86_64, the DHCP service is offered
by dnsmasq.
The client is a VM expected to be installed with RHEL 5.4.

When logging dsmasq, I can see that the dns server option (6) is sent
to the client  as well as the hostname option (12).

Below the dnsmasq log on the server
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: DHCP packet: transaction-id
is 1664975136
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: Available DHCP range:
192.168.84.250 -- 192.168.84.251
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: Vendor class: anaconda
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: DHCPREQUEST(br0)
192.168.84.250 54:52:00:22:92:83
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: DHCPACK(br0) 192.168.84.250
54:52:00:22:92:83 testVM
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: requested options: 1:netmask,
28:broadcast, 3:router, 15:domain-name,
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: requested options:
6:dns-server, 12:hostname, 33:static-route
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: next server: 192.168.84.254
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: bootfile name: pxelinux.0
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: tags: known
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  1 option:
53:message-type  05
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option:
54:server-identifier  c0:a8:54:fe
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option:
51:lease-time  00:00:1c:20
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option: 58:T1
00:00:0e:10
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option: 59:T2
00:00:18:9c
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option:
1:netmask  ff:ff:ff:00
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option:
28:broadcast  c0:a8:54:ff
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  4 option:
3:router  c0:a8:54:fe
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  6 option:
12:hostname  74:65:73:74:56:4d
Aug 12 13:24:16 cmxi1152 dnsmasq[11759]: sent size:  8 option:
6:dns-server  0a:92:00:0b:0a:92:24:0b

On client side (console ALT-F3 log)
11:24:15 INFO     : getting kickstart file
11:24:15 INFO     : sending dhcp request through device eth0
11:24:15 INFO     : requesting dhcp timeout 45
11:24:15 INFO     : Listening on LPF/eth0/54:52:00:22:93:83
11:24:15 INFO     : Sending on LPF/eth0/54:52:00:22:93:83
11:24:15 INFO     : Sending on Socket/fallback
11:24:15 INFO     : DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5
11:24:15 INFO     : DHCPOFFER from 192.168.84.254
11:24:15 INFO     : DHCPREQUEST on eth0 to 255.255.255.255 port 67
11:24:15 INFO     : DHCPACK from 192.168.84.254
11:24:15 INFO     : bound to 192.168.84.250 -- renewal in 3052 seconds.
11:24:15 INFO     : DHCPv4 eth0 - obtained lease 192.168.84.250
11:24:15 INFO     : DHCPv4 eth0 - option subnet-mask: 255.255.255.0
11:24:15 INFO     : DHCPv4 eth0 - option subnet-mask - prefix_len: 24
broadcast: 192.168.84.254
11:24:15 INFO     : DHCPv4 eth0 - option routers:
11:24:15 ERROR : no DNS servers, can't look up hostname

Thanks

Brem


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