[syslinux] RE: RFC 3942 notice: PXELINUX, DHCP options 208-211
volz at cisco.com
Tue Jan 18 17:04:53 PST 2005
Do you intend to write the required Internet-Draft (for submission as an
RFC) or do you want to have these options included in a "general" options
draft (for which I'm willing to act as editor).
> -----Original Message-----
> From: H. Peter Anvin [mailto:hpa at zytor.com]
> Sent: Tuesday, January 18, 2005 7:48 PM
> To: iana at iana.org; dhcwg at ietf.org; volz at cisco.com; David W. Hankins
> Cc: SYSLINUX at zytor.com
> Subject: RFC 3942 notice: PXELINUX, DHCP options 208-211
> Dear friends,
> In accordance with RFC 3942 I would like to submit the following DHCP
> options for official consideration. These options are used
> by PXELINUX,
> which is part of the SYSLINUX distribution, and although exact usage
> count is impossible to determine, is widely held to be the
> most widely
> used method for booting Linux from a network.
> Option 208: pxelinux.magic (string)
> Must be set to F1:00:74:7E (241.0.116.126) for PXELINUX to
> recognize any
> special DHCP options whatsoever.
> Option 209: pxelinux.configfile (text)
> Specifies the PXELINUX configuration file name.
> Option 210: pxelinux.pathprefix (text)
> Specifies the PXELINUX common path prefix, instead of
> deriving it from
> the boot file name. This almost certainly needs to end in whatever
> character the TFTP server OS uses as a pathname separator, e.g. slash
> (/) for Unix.
> Option 211: pxelinux.reboottime (unsigned integer 32 bits)
> Specifies, in seconds, the approximate time to wait before
> reboot in the
> event of TFTP failure. 0 means wait forever (in reality, it waits
> approximately 136 years.)
> Out of these, option 208 is strictly use as a safety and is obviously
> not required if 209-211 become official assignments.
> It is my belief that 209, 210 and 211 are of general interest
> and should
> be promoted to official. In particular a more withspread use of 211
> would probably improve remote booting reliability by giving
> the server
> explicit control over the early boot failure policy.
> Option 210 could arguably be considered redundant with option
> 17, but I
> personally feel they are distinct enough to warrant separate
> assignments. In particular, 210 is more of a "current working
> directory" than a root image path.
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