[CentOS] DHCP client not working with Windows DHCP / dynamic DNS server

# Broadcom Corporation NetXtreme BCM5754 Gigabit Ethernet PCI Express
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:22:19:XX:XX:XX
ONBOOT=yes
DHCP_HOSTNAME=centos.XXXXXXXXXX.local

In this particular instance, it's a place where Windows is used for DHCP 
and DNS servers. :( I have no control over the Windows side of things.

The Windows sysadmins claim I don't need a fixed IP address, because DNS 
will pick up the name after I make the DHCP request. The problem is, 
that doesn't happen, even though the DHCP client is correctly configured 
(see above). The system is vanilla CentOS 5.4, text-mode install, fully 
updated.

I boot the CentOS system. Then, on another Linux machine, I do "host 
centos.XXXXXXX.local" and it returns host not found. However, if I do 
the same for other hostnames, DNS resolution works fine.

Is there anything else I can do on my side to make it happen? Any 
particular options in dhclient.conf or something like that?

-- 
Florin Andrei
http://florin.myip.org/