Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision
Previous revision
httpboot [2007/08/16 13:18]
mcb30 created
httpboot [2010/10/14 04:39]
dali
Line 9: Line 9:
  
     filename "​http://​my.web.server/​pxe.0";​     filename "​http://​my.web.server/​pxe.0";​
 +
 +{{ screenshots/​uniboot1.png?​360x200|Linux booting via HTTP}}
  
 ===== Scalability ===== ===== Scalability =====
  
 HTTP can handle much larger files than TFTP, and scale to much larger distances. ​ You can easily download multi-megabyte files, such as a Linux kernel and a root filesystem, and you can download from servers that are not on your local area network. ​ We have successfully tested booting across the Atlantic using HTTP! HTTP can handle much larger files than TFTP, and scale to much larger distances. ​ You can easily download multi-megabyte files, such as a Linux kernel and a root filesystem, and you can download from servers that are not on your local area network. ​ We have successfully tested booting across the Atlantic using HTTP!
 +===== Using PXELINUX =====
 +
 +PXELINUX versions >= 3.70 can use gPXE-provided HTTP.  (See syslinux/​NEWS "​Changes in 3.70")
 +
 +By default, PXELINUX will look for its configuration file using TFTP.  To override this behaviour, you can specify DHCP options 209 and/or 210.  (See syslinux/​doc/​rfc5071.txt)
 +
 +You can specify these options with your DHCP service or you can specify them in a gPXE script:
 +
 +    #!gpxe
 +    echo Performing DHCP on first network interface
 +    dhcp net0
 +    set 209:string pxelinux.cfg/​default
 +    set 210:string http://​example.com/​
 +    chain ${210:​string}pxelinux.0
 +
 +The '​chain'​ command above will be expanded by gPXE to:
 +  chain http://​example.com/​pxelinux.0
 +and the chained-to PXELINUX will look for its configuration file using the 210 prefix.
 +All relative paths specified in the PXELINUX configuration file will also have this prefix
 +prepended to them.
 +
 +===== Using gpxelinux.0 =====
 +
 +Since SYSLINUX 3.85 there is also the option of using gpxelinux.0 with pxelinux.0 embedded, example:
 +<code text>
 +#!gpxe
 +echo Performing DHCP on first network interface
 +dhcp net0
 +set 209:string pxelinux.cfg/​default
 +set 210:string http://​example.com/​
 +imgload pxelinux.0
 +boot pxelinux.0
 +</​code>​
  

QR Code
QR Code httpboot (generated for current page)