Kickstart + DHCP booting from CDROM/Memory Stick

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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
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