Please Urgent: Failover problem

Abu Abdulla alhanbali montaqa at
Thu Apr 12 10:13:38 UTC 2007

I tried this option but it didn't seem to work correctly.
the dhcpd.conf now is (server IP

$more /etc/dhcpd.conf
allow booting;
allow bootp;

ddns-update-style none;
log-facility local2;

subnet netmask

subnet netmask
  option routers;
  option subnet-mask;
  option broadcast-address;
  max-lease-time 10;
  default-lease-time 15;
  server-name "";
  option root-path "";
  option tftp-server-name "";
  filename "/tftpboot/pppoe.tlv";
  option bootfile-name "/tftpboot/pppoe.tlv";

On the other hand, I sniffed the traffic using ethereal and the DHCPOFFER
Your (client) IP address: (
Next server IP address: (
Relay agent IP address: (
Client MAC address:Integrit_09:ee:3f (00:10:6d:09:ee:3f)
server host name:
Boot file name /tftpboot/pppoe.tlv
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP offer
Option 54: Server Identifier =
Option 51: IP Address Lease Time = 10 seconds
Option 1: Subnet Mask =
Option 28: Broadcast Address =
Option 3: Router =
End Option

To know exactly what the output should be I have run Solaris DHCP and it
works fine and the output was the same with these additional options:

Option 17: Root Path = "/tftpboot"
Option 67: Bootfile name = "pppoe.vlt"
Option 66: TFTP Server Name = ""
Option 31: Perform Router Discover = Enabled

So how can I add these options in ISC DHCP. The previous dhcpd.conf didn't
work with me. In addition where can I know the option number if I know the
option name.
Morever I want to use failover server, will this work since in failover I
should add "deny dynamic bootp clients".

Thanks in advance.

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