I am trying to configure /etc/dhcp/dhcpd.conf file to get a PXE server working on RHEL6 server. But the client complains about "no DHCP offers were received."
I have the conf file as below and then I just restart the dhcpd service. The pxelinux.0 is in /var/lib/tftpboot/ directory. What am i doing wrong?
192.168.95.12 is the port of the server.
========
authoritative;
ddns-update-style none;
allow booting;
allow bootp;
subnet 192.168.80.0 netmask 255.255.240.0 {
range 192.168.84.64 192.168.84.127;
default-lease-time 36000;
max-lease-time 100000;
next-server 192.168.95.12;
filename "pxelinux.0";
}

Check syslog for dhcpd errors.
Check the leases file to see if the server thinks it offered a lease.
If it's not the server, try ping 192.168.95.12 from the client to make sure the net is working.

Thanks for the reply. I see my IPs there (from the range I gave) but not MACs are not for my clients. How is that? I am using vlan for this pxe setup. So this is vlan issue?
======
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-4.1.1-P1

lease 192.168.85.5 { this is the IP from my range
starts 4 2012/05/10 17:01:51;
ends 4 2012/05/10 17:11:51;
tstp 4 2012/05/10 17:11:51;
cltt 4 2012/05/10 17:01:51;
binding state free;
hardware ethernet 2c:27:d7:52:bb:b0; NOT MY MAC
uid "\001,'\327R\273\260";
}
lease 192.168.85.6 { this is the IP from my range
starts 4 2012/05/10 17:01:54;
ends 4 2012/05/10 17:11:54;
tstp 4 2012/05/10 17:11:54;
cltt 4 2012/05/10 17:01:54;
binding state free;
hardware ethernet 2c:27:d7:52:bb:b4; NOT MY MAC
uid "\001,'\327R\273\264";
}
server-duid "\000\001\000\001\027<A\373\000\300\335\020v\364";

Thanks. It was a vlan issue. It works now.