Hi, I have stuck at the first step of diskless boot in Scietific linux! So any idea is appreciated I am using virtualBox on Windows 7 and I have installed a SL6.3 guest as the server and another guest as the diskless client. The server configs are 1) # ls /var/lib/tftpboot/ -R /var/lib/tftpboot/: menu.c32 pxelinux.0 pxelinux.cfg sl6 /var/lib/tftpboot/pxelinux.cfg: default /var/lib/tftpboot/sl6: initrd.img vmlinuz 2) # cat /var/lib/tftpboot/pxelinux.cfg/default timeout 100 default menu.c32 menu title ########## PXE Boot Menu ########## label 1 menu label ^1) Install Scientific Linux 6 kernel sl6/vmlinuz append initrd=sl6/initrd.img method=http://10.0.2.51/sl6 devfs=nomount label 2 menu label ^2) Boot from local drive localboot 3) # cat /etc/dnsmasq.conf no-resolv no-poll interface=eth2 domain=hpclab expand-hosts dhcp-range=10.0.2.52,10.0.2.100,static dhcp-option=42,0.0.0.0 dhcp-boot=pxelinux.0 enable-tftp tftp-root=/var/lib/tftpboot dhcp-host=08:00:27:69:73:7A,ws04,10.0.2.52 Now when I start the client, I receive this error CLIENT MAC ADDR: 08 00 27 69 73 7A GUID: EF720459-193C-4558-8C46-15FF790FCD1C PXE-E51: No DHCP or proxyDHCP offers were received As you can see below, both server and client have the same network type "Internal Network" and the same adapter "PCnet-Fast III". Please see the pictures http://i.stack.imgur.com/wapyf.jpg http://i.stack.imgur.com/XkRIc.jpg http://i.stack.imgur.com/amijN.jpg What is the problem? Regards, Mahmood View on i.stack.imgur.com Preview by Yahoo