Kickstart + DHCP booting from CDROM/Memory Stick

[Ryan Golhar]

Hopefully, this is the last of my weird problems...

I have a bunch of systems on a subnet where IP addresses are given out 
by two DHCP servers.  The primary DHCP server hands out addresses to 
every machines on this subnet.  The build DHCP server hands out specific 
IP addresses to specific machines based on MAC address.  If the primary 
DHCP server tries to hand out an address to one of a group of machines, 
the build DHCP server NAKs that address and forces a specific address.

Don't ask why we do it this way, we just do and don't have a choice.

In any case, if I boot RHEL5 for kickstarting a machine, from DVD, the 
correct IP address is obtained.  If I boot from a USB Memory stick, the 
wrong IP address is obtained.  I can consistently reproduce this.

I highly doubt its the DHCP servers since this has been functioning for 
more than 5 yrs now.  I suspect there is a difference in the boot 
process from memory stick to CD, but I'm not sure and am hoping someone 
here has more information?

I don't want to have to burn a DVD each time there is a new RHEL release 
when creating a bootdisk image on a memory stick is much easier.

Ryan