PXE & AoE - 國立中央大學電子計算機中心

Outline• What is “PXE” ? “AoE” ?– Introduction• How does it work– Architecture– Flow chart• Install & Setup– Servers (dhcpd, tftpd, vbladed)– Windows• Demo• Reference2

Introduction•AoE–abbr. of ATA over Ethernet–is a network protocol designed for simple,high-performance access of SATA storagedevices over Ethernet networks.– It gives the possibility to build SANs with lowcost,standard technologies.4

Introduction (cont’d)•PXE–abbr. of Preboot eXecution Environment– is an environment to boot computers usingnetwork interface independently of availabledata storage devices (like hard disks) orinstalled operating systems.– was introduced by Intel as part of the Wiredfor Management framework5

Architecture• Desktop PCs all without HDD and support PXE boot function• DHCP & TFTP Server can be either split into two or just all built in one6

Flow chart7http://www.argontechnology.com/ docs/htm/pxe/pxe.gif

Installation•DHCP Server:– net/isc-dhcp3-server– # make install•TFTP Server:–ftp/tftp-hpa– # make install8

Installation (cont’d)•vblade:–#fetchhttp://nchc.dl.sourceforge.net/sourceforge/aoetools/vblade-18.tgz– #tar zxf vblade-18.tgz– #cd vblade-18 ; make PLATFORM=freebsd9

Installation (cont’d)• make you own Boot ROM image:– http://rom-o-matic.net/• and save it to /root10

Setup - dhcpd.confdefault-lease-time 21600;max-lease-time 86400;option domain-name"csie.ncu.edu.tw";option routers 140.115.50.254;option domain-name-servers 140.115.50.2;option perform-mask-discovery on;option mask-supplieron;ddns-update-stylenone;allow booting;allow bootp;subnet 140.115.50.0 netmask 255.255.255.0 {option subnet-mask 255.255.255.0;next-server 140.115.50.60; # where to find the tftpd serverfilename “gpxe-0.9.3-e1000.pxe"; # boot program (from gpxe)option root-path “e0.0p1"; # aoe’s shelf, slot, partition}host venux {hardware ethernet 00:11:2f:b8:6d:c8;fixed-address 140.115.50.75;}11

Setup - Windows• Install WinAoE, the AoE driver for Windows–http://www.winaoe.org/• By modifying the Windows registry to let AoE driver beloaded while OS startup– FindHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\e1express– and change the "Start" key to 0 (boot)• Step by step instruction:–http://etherboot.org/wiki/sanboot/winnt_aoe12

Setup – Windows (cont’d)• Turn off the Windows Virtual Memoryfeature (pagefile.sys)13

Start it• # /usr/local/etc/rc.d/isc-dhcpd forcestart• # /usr/local/libexec/in.tftpd -Lv -s /root• # ./vblade 0 0 em0 /dev/ad814

Reference• Introduction to PXE– http://www.argontechnology.com/docs/htm/pxe/index.shtml• Wikipedia– http://en.wikipedia.org/wiki/Preboot_Execution_Environment– http://en.wikipedia.org/wiki/ATA_over_Ethernet• SYSLinux, PXELinux, …– http://syslinux.zytor.com/• WinAoE– http://winaoe.org• vblade– http://aoetools.sourceforge.net/• qaoed– http://code.google.com/p/qaoed/• Etherboot, gPXE– http://etherboot.org/– http://etherboot.org/wiki/sanboot/winnt_aoe• Rom-o-matic– http://rom-o-matic.net/• Setup PXE Boot on FreeBSD in 3 minutes– http://jnlin.org/2006/10/29/141/18

Questions?19