User manual SONY VAIO VPC-EA21FX/T

[. . . ] Intel's PXE is a protocol that defines interaction between TCP/IP, DHCP and TFTP to enable a client to download a pre-boot environment from a server. Before the operating system is started a PXE enabled client broadcasts a DHCPDISCOVER request with an extension tag that identifies it as a PXE request. A DHCP server or DHCP proxy listening for PXE requests then sends the client a list of boot servers. The client uses TFTP to download an ITF Agent, which in turn downloads a complete binary image to the terminal. [. . . ] Images can be created which contain any combination of boot code, BIOS, OEM File System (OEMFS) drivers and/or O/S image. 3 The administrator distributes the `Push_ITFPXE_Image' package to the powered-down client. NOTE: The client must have been previously discovered by Rapport (resident in Rapport database). If this is not the case, please see the "Manually Adding a New Client" topic in the Rapport Help File. NOTE: The administrator must modify Push_ITFPXE_Image. rsp (located in the Rapport Software Repository) to comment out the `RB' command in the script. To do this, simply place a semicolon before the command (e. g. ;RB). 4 Rapport issues Wake On LAN (WOL) packet to the client MAC address. The client boots up and issues DHCP discover on port 67 which contains PXE Client BIOS extension information. The DHCP or DHCP Proxy server responds to the client with the IP address and location of PXE server (Rapport) on port 68. 5 6 (Continued) 1774-1002A-WWEN 5 WHITE PAPER (cont. ) Table 3. Corrupt Firmware Scenario (Continued) Step 7 8 Thin Client The client responds confirming IP on port 67. Server The DHCP or DHCP Proxy server acknowledges on port 68. The client issues a boot service discover packet containing its IP and PXEClient BIOS extension information on port 4011. Boot Service (Rapport) replies with an acknowledgment containing PXE server information and the name of the boot file (RapportITF). NOTE: Ensure that the thin client is powered on, and the monitor, keyboard and mouse are attached. IMPORTANT: This utility program is designed to run on a Host PC connected directly to the Compaq T20 or T30 and not through a networked environment. 1774-1002A-WWEN 8 WHITE PAPER (cont. ) Step 7: Starting Download To start the download: a. Press and hold down the power button for 10 seconds. Press and hold the "P" key on the Evo T20 or T30 keyboard until the NetXfer prompt appears c. As the download program progresses, updates will appear on this monitor. The firmware will automatically be installed on the Evo T20 or T30. IMPORTANT: Do not power off or disconnect unit until the download is complete to avoid corrupting the boot flash. When the download is complete, the terminal will automatically restart with the new firmware. The PC will indicate when the download is finished, as shown below: At the end of the download process the Evo T20 should re-boot normally and start up with the new firmware. The Evo T30 will display a message that says it is OK to power the unit off. Disconnect the crossover cable and reconnect the local area network cable. If there is any problem, recheck the steps listed above and try again. Step 8: Downloading Files to Additional Units To download files to additional units with the same firmware image, it is not necessary to restart this program. [. . . ] Images can be created which contain any combination of boot code, BIOS, OEM File System (OEMFS) drivers and/or O/S image. 3 The network administrator distributes the `Push_ITFPXE_Image' package to the powered-down client. Rapport processes `Push_ITFPXE_Image' script and reboots the client. The client boots up, issues DHCP discover on port 67 which contains PXEClient BIOS extension information. The DHCP or DHCP Proxy server responds to client with IP address and location of the PXE server (Rapport) on port 68. [. . . ]