| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" | |
| "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> | |
| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> | |
| <head> | |
| <meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" /> | |
| <meta name="generator" content="AsciiDoc 8.6.8" /> | |
| <title>pxelinux(1)</title> | |
| <style type="text/css"> | |
| /* Shared CSS for AsciiDoc xhtml11 and html5 backends */ | |
| /* Default font. */ | |
| body { | |
| font-family: Georgia,serif; | |
| } | |
| /* Title font. */ | |
| h1, h2, h3, h4, h5, h6, | |
| div.title, caption.title, | |
| thead, p.table.header, | |
| #toctitle, | |
| #author, #revnumber, #revdate, #revremark, | |
| #footer { | |
| font-family: Arial,Helvetica,sans-serif; | |
| } | |
| body { | |
| margin: 1em 5% 1em 5%; | |
| } | |
| a { | |
| color: blue; | |
| text-decoration: underline; | |
| } | |
| a:visited { | |
| color: fuchsia; | |
| } | |
| em { | |
| font-style: italic; | |
| color: navy; | |
| } | |
| strong { | |
| font-weight: bold; | |
| color: #083194; | |
| } | |
| h1, h2, h3, h4, h5, h6 { | |
| color: #527bbd; | |
| margin-top: 1.2em; | |
| margin-bottom: 0.5em; | |
| line-height: 1.3; | |
| } | |
| h1, h2, h3 { | |
| border-bottom: 2px solid silver; | |
| } | |
| h2 { | |
| padding-top: 0.5em; | |
| } | |
| h3 { | |
| float: left; | |
| } | |
| h3 + * { | |
| clear: left; | |
| } | |
| h5 { | |
| font-size: 1.0em; | |
| } | |
| div.sectionbody { | |
| margin-left: 0; | |
| } | |
| hr { | |
| border: 1px solid silver; | |
| } | |
| p { | |
| margin-top: 0.5em; | |
| margin-bottom: 0.5em; | |
| } | |
| ul, ol, li > p { | |
| margin-top: 0; | |
| } | |
| ul > li { color: #aaa; } | |
| ul > li > * { color: black; } | |
| .monospaced, code, pre { | |
| font-family: "Courier New", Courier, monospace; | |
| font-size: inherit; | |
| color: navy; | |
| padding: 0; | |
| margin: 0; | |
| } | |
| #author { | |
| color: #527bbd; | |
| font-weight: bold; | |
| font-size: 1.1em; | |
| } | |
| #email { | |
| } | |
| #revnumber, #revdate, #revremark { | |
| } | |
| #footer { | |
| font-size: small; | |
| border-top: 2px solid silver; | |
| padding-top: 0.5em; | |
| margin-top: 4.0em; | |
| } | |
| #footer-text { | |
| float: left; | |
| padding-bottom: 0.5em; | |
| } | |
| #footer-badges { | |
| float: right; | |
| padding-bottom: 0.5em; | |
| } | |
| #preamble { | |
| margin-top: 1.5em; | |
| margin-bottom: 1.5em; | |
| } | |
| div.imageblock, div.exampleblock, div.verseblock, | |
| div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock, | |
| div.admonitionblock { | |
| margin-top: 1.0em; | |
| margin-bottom: 1.5em; | |
| } | |
| div.admonitionblock { | |
| margin-top: 2.0em; | |
| margin-bottom: 2.0em; | |
| margin-right: 10%; | |
| color: #606060; | |
| } | |
| div.content { /* Block element content. */ | |
| padding: 0; | |
| } | |
| /* Block element titles. */ | |
| div.title, caption.title { | |
| color: #527bbd; | |
| font-weight: bold; | |
| text-align: left; | |
| margin-top: 1.0em; | |
| margin-bottom: 0.5em; | |
| } | |
| div.title + * { | |
| margin-top: 0; | |
| } | |
| td div.title:first-child { | |
| margin-top: 0.0em; | |
| } | |
| div.content div.title:first-child { | |
| margin-top: 0.0em; | |
| } | |
| div.content + div.title { | |
| margin-top: 0.0em; | |
| } | |
| div.sidebarblock > div.content { | |
| background: #ffffee; | |
| border: 1px solid #dddddd; | |
| border-left: 4px solid #f0f0f0; | |
| padding: 0.5em; | |
| } | |
| div.listingblock > div.content { | |
| border: 1px solid #dddddd; | |
| border-left: 5px solid #f0f0f0; | |
| background: #f8f8f8; | |
| padding: 0.5em; | |
| } | |
| div.quoteblock, div.verseblock { | |
| padding-left: 1.0em; | |
| margin-left: 1.0em; | |
| margin-right: 10%; | |
| border-left: 5px solid #f0f0f0; | |
| color: #888; | |
| } | |
| div.quoteblock > div.attribution { | |
| padding-top: 0.5em; | |
| text-align: right; | |
| } | |
| div.verseblock > pre.content { | |
| font-family: inherit; | |
| font-size: inherit; | |
| } | |
| div.verseblock > div.attribution { | |
| padding-top: 0.75em; | |
| text-align: left; | |
| } | |
| /* DEPRECATED: Pre version 8.2.7 verse style literal block. */ | |
| div.verseblock + div.attribution { | |
| text-align: left; | |
| } | |
| div.admonitionblock .icon { | |
| vertical-align: top; | |
| font-size: 1.1em; | |
| font-weight: bold; | |
| text-decoration: underline; | |
| color: #527bbd; | |
| padding-right: 0.5em; | |
| } | |
| div.admonitionblock td.content { | |
| padding-left: 0.5em; | |
| border-left: 3px solid #dddddd; | |
| } | |
| div.exampleblock > div.content { | |
| border-left: 3px solid #dddddd; | |
| padding-left: 0.5em; | |
| } | |
| div.imageblock div.content { padding-left: 0; } | |
| span.image img { border-style: none; } | |
| a.image:visited { color: white; } | |
| dl { | |
| margin-top: 0.8em; | |
| margin-bottom: 0.8em; | |
| } | |
| dt { | |
| margin-top: 0.5em; | |
| margin-bottom: 0; | |
| font-style: normal; | |
| color: navy; | |
| } | |
| dd > *:first-child { | |
| margin-top: 0.1em; | |
| } | |
| ul, ol { | |
| list-style-position: outside; | |
| } | |
| ol.arabic { | |
| list-style-type: decimal; | |
| } | |
| ol.loweralpha { | |
| list-style-type: lower-alpha; | |
| } | |
| ol.upperalpha { | |
| list-style-type: upper-alpha; | |
| } | |
| ol.lowerroman { | |
| list-style-type: lower-roman; | |
| } | |
| ol.upperroman { | |
| list-style-type: upper-roman; | |
| } | |
| div.compact ul, div.compact ol, | |
| div.compact p, div.compact p, | |
| div.compact div, div.compact div { | |
| margin-top: 0.1em; | |
| margin-bottom: 0.1em; | |
| } | |
| tfoot { | |
| font-weight: bold; | |
| } | |
| td > div.verse { | |
| white-space: pre; | |
| } | |
| div.hdlist { | |
| margin-top: 0.8em; | |
| margin-bottom: 0.8em; | |
| } | |
| div.hdlist tr { | |
| padding-bottom: 15px; | |
| } | |
| dt.hdlist1.strong, td.hdlist1.strong { | |
| font-weight: bold; | |
| } | |
| td.hdlist1 { | |
| vertical-align: top; | |
| font-style: normal; | |
| padding-right: 0.8em; | |
| color: navy; | |
| } | |
| td.hdlist2 { | |
| vertical-align: top; | |
| } | |
| div.hdlist.compact tr { | |
| margin: 0; | |
| padding-bottom: 0; | |
| } | |
| .comment { | |
| background: yellow; | |
| } | |
| .footnote, .footnoteref { | |
| font-size: 0.8em; | |
| } | |
| span.footnote, span.footnoteref { | |
| vertical-align: super; | |
| } | |
| #footnotes { | |
| margin: 20px 0 20px 0; | |
| padding: 7px 0 0 0; | |
| } | |
| #footnotes div.footnote { | |
| margin: 0 0 5px 0; | |
| } | |
| #footnotes hr { | |
| border: none; | |
| border-top: 1px solid silver; | |
| height: 1px; | |
| text-align: left; | |
| margin-left: 0; | |
| width: 20%; | |
| min-width: 100px; | |
| } | |
| div.colist td { | |
| padding-right: 0.5em; | |
| padding-bottom: 0.3em; | |
| vertical-align: top; | |
| } | |
| div.colist td img { | |
| margin-top: 0.3em; | |
| } | |
| @media print { | |
| #footer-badges { display: none; } | |
| } | |
| #toc { | |
| margin-bottom: 2.5em; | |
| } | |
| #toctitle { | |
| color: #527bbd; | |
| font-size: 1.1em; | |
| font-weight: bold; | |
| margin-top: 1.0em; | |
| margin-bottom: 0.1em; | |
| } | |
| div.toclevel0, div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 { | |
| margin-top: 0; | |
| margin-bottom: 0; | |
| } | |
| div.toclevel2 { | |
| margin-left: 2em; | |
| font-size: 0.9em; | |
| } | |
| div.toclevel3 { | |
| margin-left: 4em; | |
| font-size: 0.9em; | |
| } | |
| div.toclevel4 { | |
| margin-left: 6em; | |
| font-size: 0.9em; | |
| } | |
| span.aqua { color: aqua; } | |
| span.black { color: black; } | |
| span.blue { color: blue; } | |
| span.fuchsia { color: fuchsia; } | |
| span.gray { color: gray; } | |
| span.green { color: green; } | |
| span.lime { color: lime; } | |
| span.maroon { color: maroon; } | |
| span.navy { color: navy; } | |
| span.olive { color: olive; } | |
| span.purple { color: purple; } | |
| span.red { color: red; } | |
| span.silver { color: silver; } | |
| span.teal { color: teal; } | |
| span.white { color: white; } | |
| span.yellow { color: yellow; } | |
| span.aqua-background { background: aqua; } | |
| span.black-background { background: black; } | |
| span.blue-background { background: blue; } | |
| span.fuchsia-background { background: fuchsia; } | |
| span.gray-background { background: gray; } | |
| span.green-background { background: green; } | |
| span.lime-background { background: lime; } | |
| span.maroon-background { background: maroon; } | |
| span.navy-background { background: navy; } | |
| span.olive-background { background: olive; } | |
| span.purple-background { background: purple; } | |
| span.red-background { background: red; } | |
| span.silver-background { background: silver; } | |
| span.teal-background { background: teal; } | |
| span.white-background { background: white; } | |
| span.yellow-background { background: yellow; } | |
| span.big { font-size: 2em; } | |
| span.small { font-size: 0.6em; } | |
| span.underline { text-decoration: underline; } | |
| span.overline { text-decoration: overline; } | |
| span.line-through { text-decoration: line-through; } | |
| div.unbreakable { page-break-inside: avoid; } | |
| /* | |
| * xhtml11 specific | |
| * | |
| * */ | |
| div.tableblock { | |
| margin-top: 1.0em; | |
| margin-bottom: 1.5em; | |
| } | |
| div.tableblock > table { | |
| border: 3px solid #527bbd; | |
| } | |
| thead, p.table.header { | |
| font-weight: bold; | |
| color: #527bbd; | |
| } | |
| p.table { | |
| margin-top: 0; | |
| } | |
| /* Because the table frame attribute is overriden by CSS in most browsers. */ | |
| div.tableblock > table[frame="void"] { | |
| border-style: none; | |
| } | |
| div.tableblock > table[frame="hsides"] { | |
| border-left-style: none; | |
| border-right-style: none; | |
| } | |
| div.tableblock > table[frame="vsides"] { | |
| border-top-style: none; | |
| border-bottom-style: none; | |
| } | |
| /* | |
| * html5 specific | |
| * | |
| * */ | |
| table.tableblock { | |
| margin-top: 1.0em; | |
| margin-bottom: 1.5em; | |
| } | |
| thead, p.tableblock.header { | |
| font-weight: bold; | |
| color: #527bbd; | |
| } | |
| p.tableblock { | |
| margin-top: 0; | |
| } | |
| table.tableblock { | |
| border-width: 3px; | |
| border-spacing: 0px; | |
| border-style: solid; | |
| border-color: #527bbd; | |
| border-collapse: collapse; | |
| } | |
| th.tableblock, td.tableblock { | |
| border-width: 1px; | |
| padding: 4px; | |
| border-style: solid; | |
| border-color: #527bbd; | |
| } | |
| table.tableblock.frame-topbot { | |
| border-left-style: hidden; | |
| border-right-style: hidden; | |
| } | |
| table.tableblock.frame-sides { | |
| border-top-style: hidden; | |
| border-bottom-style: hidden; | |
| } | |
| table.tableblock.frame-none { | |
| border-style: hidden; | |
| } | |
| th.tableblock.halign-left, td.tableblock.halign-left { | |
| text-align: left; | |
| } | |
| th.tableblock.halign-center, td.tableblock.halign-center { | |
| text-align: center; | |
| } | |
| th.tableblock.halign-right, td.tableblock.halign-right { | |
| text-align: right; | |
| } | |
| th.tableblock.valign-top, td.tableblock.valign-top { | |
| vertical-align: top; | |
| } | |
| th.tableblock.valign-middle, td.tableblock.valign-middle { | |
| vertical-align: middle; | |
| } | |
| th.tableblock.valign-bottom, td.tableblock.valign-bottom { | |
| vertical-align: bottom; | |
| } | |
| /* | |
| * manpage specific | |
| * | |
| * */ | |
| body.manpage h1 { | |
| padding-top: 0.5em; | |
| padding-bottom: 0.5em; | |
| border-top: 2px solid silver; | |
| border-bottom: 2px solid silver; | |
| } | |
| body.manpage h2 { | |
| border-style: none; | |
| } | |
| body.manpage div.sectionbody { | |
| margin-left: 3em; | |
| } | |
| @media print { | |
| body.manpage div#toc { display: none; } | |
| } | |
| </style> | |
| <script type="text/javascript"> | |
| /*<+'])'); | |
| // Function that scans the DOM tree for header elements (the DOM2 | |
| // nodeIterator API would be a better technique but not supported by all | |
| // browsers). | |
| var iterate = function (el) { | |
| for (var i = el.firstChild; i != null; i = i.nextSibling) { | |
| if (i.nodeType == 1 /* Node.ELEMENT_NODE */) { | |
| var mo = re.exec(i.tagName); | |
| if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") { | |
| result[result.length] = new TocEntry(i, getText(i), mo[1]-1); | |
| } | |
| iterate(i); | |
| } | |
| } | |
| } | |
| iterate(el); | |
| return result; | |
| } | |
| var toc = document.getElementById("toc"); | |
| if (!toc) { | |
| return; | |
| } | |
| // Delete existing TOC entries in case we're reloading the TOC. | |
| var tocEntriesToRemove = []; | |
| var i; | |
| for (i = 0; i < toc.childNodes.length; i++) { | |
| var entry = toc.childNodes[i]; | |
| if (entry.nodeName.toLowerCase() == 'div' | |
| && entry.getAttribute("class") | |
| && entry.getAttribute("class").match(/^toclevel/)) | |
| tocEntriesToRemove.push(entry); | |
| } | |
| for (i = 0; i < tocEntriesToRemove.length; i++) { | |
| toc.removeChild(tocEntriesToRemove[i]); | |
| } | |
| // Rebuild TOC entries. | |
| var entries = tocEntries(document.getElementById("content"), toclevels); | |
| for (var i = 0; i < entries.length; ++i) { | |
| var entry = entries[i]; | |
| if (entry.element.id == "") | |
| entry.element.id = "_toc_" + i; | |
| var a = document.createElement("a"); | |
| a.href = "#" + entry.element.id; | |
| a.appendChild(document.createTextNode(entry.text)); | |
| var div = document.createElement("div"); | |
| div.appendChild(a); | |
| div.className = "toclevel" + entry.toclevel; | |
| toc.appendChild(div); | |
| } | |
| if (entries.length == 0) | |
| toc.parentNode.removeChild(toc); | |
| }, | |
| ///////////////////////////////////////////////////////////////////// | |
| // Footnotes generator | |
| ///////////////////////////////////////////////////////////////////// | |
| /* Based on footnote generation code from: | |
| * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html | |
| */ | |
| footnotes: function () { | |
| // Delete existing footnote entries in case we're reloading the footnodes. | |
| var i; | |
| var noteholder = document.getElementById("footnotes"); | |
| if (!noteholder) { | |
| return; | |
| } | |
| var entriesToRemove = []; | |
| for (i = 0; i < noteholder.childNodes.length; i++) { | |
| var entry = noteholder.childNodes[i]; | |
| if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote") | |
| entriesToRemove.push(entry); | |
| } | |
| for (i = 0; i < entriesToRemove.length; i++) { | |
| noteholder.removeChild(entriesToRemove[i]); | |
| } | |
| // Rebuild footnote entries. | |
| var cont = document.getElementById("content"); | |
| var spans = cont.getElementsByTagName("span"); | |
| var refs = {}; | |
| var n = 0; | |
| for (i=0; i<spans.length; i++) { | |
| if (spans[i].className == "footnote") { | |
| n++; | |
| var note = spans[i].getAttribute("data-note"); | |
| if (!note) { | |
| // Use [\s\S] in place of . so multi-line matches work. | |
| // Because JavaScript has no s (dotall) regex flag. | |
| note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1]; | |
| spans[i].innerHTML = | |
| "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n + | |
| "' title='View footnote' class='footnote'>" + n + "</a>]"; | |
| spans[i].setAttribute("data-note", note); | |
| } | |
| noteholder.innerHTML += | |
| "<div class='footnote' id='_footnote_" + n + "'>" + | |
| "<a href='#_footnoteref_" + n + "' title='Return to text'>" + | |
| n + "</a>. " + note + "</div>"; | |
| var id =spans[i].getAttribute("id"); | |
| if (id != null) refs["#"+id] = n; | |
| } | |
| } | |
| if (n == 0) | |
| noteholder.parentNode.removeChild(noteholder); | |
| else { | |
| // Process footnoterefs. | |
| for (i=0; i<spans.length; i++) { | |
| if (spans[i].className == "footnoteref") { | |
| var href = spans[i].getElementsByTagName("a")[0].getAttribute("href"); | |
| href = href.match(/#.*/)[0]; // Because IE return full URL. | |
| n = refs[href]; | |
| spans[i].innerHTML = | |
| "[<a href='#_footnote_" + n + | |
| "' title='View footnote' class='footnote'>" + n + "</a>]"; | |
| } | |
| } | |
| } | |
| }, | |
| install: function(toclevels) { | |
| var timerId; | |
| function reinstall() { | |
| asciidoc.footnotes(); | |
| if (toclevels) { | |
| asciidoc.toc(toclevels); | |
| } | |
| } | |
| function reinstallAndRemoveTimer() { | |
| clearInterval(timerId); | |
| reinstall(); | |
| } | |
| timerId = setInterval(reinstall, 500); | |
| if (document.addEventListener) | |
| document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false); | |
| else | |
| window.onload = reinstallAndRemoveTimer; | |
| } | |
| } | |
| asciidoc.install(); | |
| /*]]>*/ | |
| </script> | |
| </head> | |
| <body class="manpage"> | |
| <div id="header"> | |
| <h1> | |
| pxelinux(1) Manual Page | |
| </h1> | |
| <h2>NAME</h2> | |
| <div class="sectionbody"> | |
| <p>pxelinux - | |
| The Syslinux derivative PXELINUX for PXE network booting | |
| </p> | |
| </div> | |
| </div> | |
| <div id="content"> | |
| <div class="sect1"> | |
| <h2 id="_synopsis">SYNOPSIS</h2> | |
| <div class="sectionbody"> | |
| <div class="verseblock"> | |
| <pre class="content">pxelinux.0</pre> | |
| <div class="attribution"> | |
| </div></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_description">DESCRIPTION</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p><strong>PXELINUX</strong> is a Syslinux derivative, for booting Linux off a network | |
| server, using a network ROM conforming to the Intel PXE (Pre-Execution | |
| Environment) specification. <strong>PXELINUX</strong> is <em>*not*</em> a program that is | |
| intended to be flashed or burned into a PROM on the network card; if | |
| you want that, check out Etherboot (<a href="http://www.etherboot.org/">http://www.etherboot.org/</a>). | |
| Etherboot 5.4 or later can also be used to create a PXE-compliant boot | |
| PROM for many network cards.</p></div> | |
| <div class="paragraph"><p>PXELINUX generally requires that full file pathnames are 127 characters or shorter in length.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_current_directory">CURRENT DIRECTORY</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>The initial current working directory is either as supplied by DHCP | |
| option 210 (pxelinux.pathprefix), the hardcoded path-prefix or the | |
| parent directory of the PXELINUX file, as indicated by DHCP fields | |
| <em>sname</em> and <em>file</em> (sname="192.168.2.3" and file="boot/pxelinux.0" | |
| results in "tftp://192.168.2.3/boot/", "192.168.2.3::boot/" in older | |
| PXELINUX format) with precedence specified under <strong>OPTIONS</strong>.</p></div> | |
| <div class="paragraph"><p>All unqualified filenames are relative to the current directory.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_configuration">CONFIGURATION</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>See <strong>syslinux.cfg</strong>(5) for the format of the contents.</p></div> | |
| <div class="paragraph"><p>Because more than one system may be booted from the same server, the | |
| configuration file name depends on the IP address of the booting | |
| machine. After attempting the file as specified in the DHCP or | |
| hardcoded options, PXELINUX will probe the following paths, prefixed | |
| with "pxelinux.cfg/", under the initial current working directory:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| The client UUID if provided by the PXE stack (note, some BIOSes don’t | |
| have a valid UUID, and you might end up with something like all 1’s.) | |
| This is in the standard UUID format using lower case hexadecimal digits, | |
| e.g. b8945908-d6a6-41a9-611d-74a6ab80b83d. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| The hardware type (using its ARP type code) and address, all in lower | |
| case hexadecimal with dash separators; for example, for an Ethernet (ARP | |
| type 1) with address 88:99:AA:BB:CC:DD it would search for the filename | |
| 01-88-99-aa-bb-cc-dd. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| The client’s IPv4 address in upper-case hexidecimal (ie 192.168.2.91 | |
| → C0A8025B; you can use the included progam "gethostip" to compute the | |
| hexadecimal IP address for any host.) followed by removing characters, | |
| one at a time, from the end. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| "default" | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>Starting in release 3.20, if PXELINUX can not find a configuration file, | |
| it will reboot after the timeout interval has expired. This keeps a | |
| machine from getting stuck indefinitely due to a boot server failure.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_options">OPTIONS</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p><strong>PXELINUX</strong> (starting with version 1.62) supports the following | |
| nonstandard DHCP options, which depending on your DHCP server you may be | |
| able to use to customize the specific behaviour of <strong>PXELINUX</strong>. See RFC | |
| 5071 for some additional information about these options. Options for | |
| <strong>PXELINUX</strong> can be specified by DHCP options or hardcoded into the | |
| binary.</p></div> | |
| <div class="sect2"> | |
| <h3 id="_option_priority">Option Priority</h3> | |
| <div class="paragraph"><p>Hardcoded after-options are applied after DHCP options (and overrride) | |
| while hardcoded before-options are applied prior to DHCP options and | |
| default behavior takes the lowest priority.</p></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_dhcp_options">DHCP options</h3> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| <strong>Option 208</strong> (pxelinux.magic) | |
| </dt> | |
| <dd> | |
| <p> | |
| Earlier versions of <strong>PXELINUX</strong> required this to be set to F1:00:74:7E | |
| (241.0.116.126) for <strong>PXELINUX</strong> to recognize any special DHCP options | |
| whatsoever. As of <strong>PXELINUX</strong> 3.55, this option is deprecated and is no | |
| longer required. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <strong>Option 209</strong> (pxelinux.configfile) | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the initial <strong>PXELINUX</strong> configuration file name which may be | |
| qualified or unqualified. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <strong>Option 210</strong> (pxelinux.pathprefix) | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies the <strong>PXELINUX</strong> 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. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <strong>Option 211</strong> (pxelinux.reboottime) | |
| </dt> | |
| <dd> | |
| <p> | |
| Specifies, in seconds, the time to wait before reboot in the event of | |
| TFTP failure. 0 means wait "forever" (in reality, it waits | |
| approximately 136 years.) | |
| </p> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_hardcoded_options">Hardcoded options</h3> | |
| <div class="paragraph"><p>Since version 3.83, the program "pxelinux-options" can be used to | |
| hard-code DHCP options into the pxelinux.0 image file; this is | |
| sometimes useful when the DHCP server is under different | |
| administrative control. Hardcoded options</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code> 6 => 'domain-name-servers', | |
| 15 => 'domain-name', | |
| 54 => 'next-server', | |
| 209 => 'config-file', | |
| 210 => 'path-prefix', | |
| 211 => 'reboottime'</code></pre> | |
| </div></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_http_ftp">HTTP/FTP</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Since version 5.10, a special PXELINUX binary, lpxelinux.0, natively | |
| supports HTTP and FTP transfers, greatly increasing load speed and | |
| allowing for standard HTTP scripts to present PXELINUX’s configuration | |
| file. To use http or ftp, use standard URL syntax as filename; use the | |
| DHCP options below to transmit a suitable URL prefix to the client, or | |
| use the "pxelinux-options" tool provided in the utils directory to | |
| program it directly into the lpxelinux.0 file.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_filename_syntax">FILENAME SYNTAX</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>PXELINUX supports the following special pathname conventions:</p></div> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| <strong>::filename</strong> | |
| </dt> | |
| <dd> | |
| <p> | |
| Suppresses the common filename prefix, i.e. passes the string "filename" | |
| unmodified to the server. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <strong>IP address::filename</strong> (e.g. 192.168.2.3::filename) | |
| </dt> | |
| <dd> | |
| <p> | |
| Suppresses the common filename prefix, <strong>and</strong> sends a request to an alternate TFTP server. Instead of an IP address, a DNS name can be used. It will be assumed to be fully qualified if it contains dots; otherwise the local domain as reported by the DHCP server (option 15) will be added. | |
| </p> | |
| </dd> | |
| </dl></div> | |
| <div class="paragraph"><p>:: was chosen because it is unlikely to conflict with operating system | |
| usage. However, if you happen to have an environment for which the | |
| special treatment of :: is a problem, please contact the Syslinux | |
| mailing list.</p></div> | |
| <div class="paragraph"><p>Since version 4.00, PXELINUX also supports standard URL syntax.</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_keeppxe">KEEPPXE</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Normally, PXELINUX will unload the PXE and UNDI stacks before invoking | |
| the kernel. In special circumstances (for example, when using MEMDISK | |
| to boot an operating system with an UNDI network driver) it might be | |
| desirable to keep the PXE stack in memory. If the option "keeppxe" | |
| is given on the kernel command line, PXELINUX will keep the PXE and | |
| UNDI stacks in memory. (If you don’t know what this means, you | |
| probably don’t need it.)</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_examples">EXAMPLES</h2> | |
| <div class="sectionbody"> | |
| <div class="sect2"> | |
| <h3 id="_configuration_filename">Configuration filename</h3> | |
| <div class="paragraph"><p>For DHCP siaddr 192.168.2.3, file <em>mybootdir/pxelinux.0</em>, client UUID | |
| b8945908-d6a6-41a9-611d-74a6ab80b83d, Ethernet MAC address | |
| 88:99:AA:BB:CC:DD and IPv4 address 192.168.2.91, the following files in | |
| this order will be attempted (after config-file options):</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>mybootdir/pxelinux.cfg/b8945908-d6a6-41a9-611d-74a6ab80b83d | |
| mybootdir/pxelinux.cfg/01-88-99-aa-bb-cc-dd | |
| mybootdir/pxelinux.cfg/C0A8025B | |
| mybootdir/pxelinux.cfg/C0A8025 | |
| mybootdir/pxelinux.cfg/C0A802 | |
| mybootdir/pxelinux.cfg/C0A80 | |
| mybootdir/pxelinux.cfg/C0A8 | |
| mybootdir/pxelinux.cfg/C0A | |
| mybootdir/pxelinux.cfg/C0 | |
| mybootdir/pxelinux.cfg/C | |
| mybootdir/pxelinux.cfg/default</code></pre> | |
| </div></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_tftp_servers">TFTP servers</h3> | |
| <div class="paragraph"><p>For best results, use a TFTP server which supports the "tsize" TFTP | |
| option (RFC 1784/RFC 2349). The "tftp-hpa" TFTP server, which support | |
| options, is available at:</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>http://www.kernel.org/pub/software/network/tftp/ | |
| ftp://www.kernel.org/pub/software/network/tftp/</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>and on any kernel.org mirror (see <a href="http://www.kernel.org/mirrors/">http://www.kernel.org/mirrors/</a>).</p></div> | |
| <div class="paragraph"><p>Another TFTP server which supports this is atftp by Jean-Pierre | |
| Lefebvre:</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>ftp://ftp.mamalinux.com/pub/atftp/</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>If your boot server is running Windows (and you can’t fix that), try | |
| tftpd32 by Philippe Jounin (you need version 2.11 or later; previous | |
| versions had a bug which made it incompatible with PXELINUX):</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>http://tftpd32.jounin.net/</code></pre> | |
| </div></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_dhcp_config_simple">DHCP config: Simple</h3> | |
| <div class="paragraph"><p>The PXE protocol uses a very complex set of extensions to DHCP or | |
| BOOTP. However, most PXE implementations — this includes all Intel | |
| ones version 0.99n and later — seem to be able to boot in a | |
| "conventional" DHCP/TFTP configuration. Assuming you don’t have to | |
| support any very old or otherwise severely broken clients, this is | |
| probably the best configuration unless you already have a PXE boot | |
| server on your network.</p></div> | |
| <div class="paragraph"><p>A sample DHCP setup, using the "conventional TFTP" configuration, | |
| would look something like the following, using ISC dhcp 2.0 dhcpd.conf | |
| syntax:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>allow booting; | |
| allow bootp; | |
| # Standard configuration directives... | |
| option domain-name "<domain name>"; | |
| option subnet-mask <subnet mask>; | |
| option broadcast-address <broadcast address>; | |
| option domain-name-servers <dns servers>; | |
| option routers <default router>; | |
| # Group the PXE bootable hosts together | |
| group { | |
| # PXE-specific configuration directives... | |
| next-server <TFTP server address>; | |
| filename "/tftpboot/pxelinux.0"; | |
| # You need an entry like this for every host | |
| # unless you're using dynamic addresses | |
| host <hostname> { | |
| hardware ethernet <ethernet address>; | |
| fixed-address <hostname>; | |
| } | |
| }</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Note that if your particular TFTP daemon runs under chroot (tftp-hpa | |
| will do this if you specify the -s (secure) option; this is highly | |
| recommended), you almost certainly should not include the /tftpboot | |
| prefix in the filename statement.</p></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_dhcp_config_pxe_1">DHCP Config: PXE-1</h3> | |
| <div class="paragraph"><p>If the simple config does not work for your environment, you probably | |
| should set up a "PXE boot server" on port 4011 of your TFTP server; a | |
| free PXE boot server is available at:</p></div> | |
| <div class="paragraph"><p><a href="http://www.kano.org.uk/projects/pxe/">http://www.kano.org.uk/projects/pxe/</a></p></div> | |
| <div class="paragraph"><p>With such a boot server defined, your DHCP configuration should look | |
| the same except for an "option dhcp-class-identifier" ("option | |
| vendor-class-identifier" if you are using DHCP 3.0):</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>allow booting; | |
| allow bootp; | |
| # Standard configuration directives... | |
| option domain-name "<domain name>"; | |
| option subnet-mask <subnet mask>; | |
| option broadcast-address <broadcast address>; | |
| option domain-name-servers <dns servers>; | |
| option routers <default router>; | |
| # Group the PXE bootable hosts together | |
| group { | |
| # PXE-specific configuration directives... | |
| option dhcp-class-identifier "PXEClient"; | |
| next-server <pxe boot server address>; | |
| # You need an entry like this for every host | |
| # unless you're using dynamic addresses | |
| host <hostname> { | |
| hardware ethernet <ethernet address>; | |
| fixed-address <hostname>; | |
| } | |
| }</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Here, the boot file name is obtained from the PXE server.</p></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_dhcp_config_encapsulated">DHCP Config: Encapsulated</h3> | |
| <div class="paragraph"><p>If the "conventional TFTP" configuration doesn’t work on your clients, | |
| and setting up a PXE boot server is not an option, you can attempt the | |
| following configuration. It has been known to boot some | |
| configurations correctly; however, there are no guarantees:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>allow booting; | |
| allow bootp; | |
| # Standard configuration directives... | |
| option domain-name "<domain name>"; | |
| option subnet-mask <subnet mask>; | |
| option broadcast-address <broadcast address>; | |
| option domain-name-servers <dns servers>; | |
| option routers <default router>; | |
| # Group the PXE bootable hosts together | |
| group { | |
| # PXE-specific configuration directives... | |
| option dhcp-class-identifier "PXEClient"; | |
| option vendor-encapsulated-options 09:0f:80:00:0c:4e:65:74:77:6f:72:6b:20:62:6f:6f:74:0a:07:00:50:72:6f:6d:70:74:06:01:02:08:03:80:00:00:47:04:80:00:00:00:ff; | |
| next-server <TFTP server>; | |
| filename "/tftpboot/pxelinux.0"; | |
| # You need an entry like this for every host | |
| # unless you're using dynamic addresses | |
| host <hostname> { | |
| hardware ethernet <ethernet address>; | |
| fixed-address <hostname>; | |
| } | |
| }</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Note that this <strong>will not</strong> boot some clients that <strong>will</strong> boot with the | |
| "conventional TFTP" configuration; Intel Boot Client 3.0 and later are | |
| known to fall into this category.</p></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_dhcp_config_isc_dhcpd_options">DHCP Config: ISC dhcpd options</h3> | |
| <div class="paragraph"><p>ISC dhcp 3.0 supports a rather nice syntax for specifying custom | |
| options; you can use the following syntax in dhcpd.conf if you are | |
| running this version of dhcpd:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>option space pxelinux; | |
| option pxelinux.magic code 208 = string; | |
| option pxelinux.configfile code 209 = text; | |
| option pxelinux.pathprefix code 210 = text; | |
| option pxelinux.reboottime code 211 = unsigned integer 32;</code></pre> | |
| </div></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>NOTE: In earlier versions of PXELINUX, this would only work as a | |
| "site-option-space". Since PXELINUX 2.07, this will work both as a | |
| "site-option-space" (unencapsulated) and as a "vendor-option-space" | |
| (type 43 encapsulated.) This may avoid messing with the | |
| dhcp-parameter-request-list, as detailed below.</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Then, inside your PXELINUX-booting group or class (whereever you have | |
| the PXELINUX-related options, such as the filename option), you can | |
| add, for example:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code># Always include the following lines for all PXELINUX clients | |
| site-option-space "pxelinux"; | |
| option pxelinux.magic f1:00:74:7e; | |
| if exists dhcp-parameter-request-list { | |
| # Always send the PXELINUX options (specified in hexadecimal) | |
| option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,d0,d1,d2,d3); | |
| } | |
| # These lines should be customized to your setup | |
| option pxelinux.configfile "configs/common"; | |
| option pxelinux.pathprefix "/tftpboot/pxelinux/files/"; | |
| option pxelinux.reboottime 30; | |
| filename "/tftpboot/pxelinux/pxelinux.bin";</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>Note that the configfile is relative to the pathprefix: this will look | |
| for a config file called /tftpboot/pxelinux/files/configs/common on | |
| the TFTP server.</p></div> | |
| <div class="paragraph"><p>The "option dhcp-parameter-request-list" statement forces the DHCP | |
| server to send the PXELINUX-specific options, even though they are not | |
| explicitly requested. Since the DHCP request is done before PXELINUX | |
| is loaded, the PXE client won’t know to request them.</p></div> | |
| <div class="paragraph"><p>Using ISC dhcp 3.0 you can create a lot of these strings on the fly. | |
| For example, to use the hexadecimal form of the hardware address as | |
| the configuration file name, you could do something like:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code>site-option-space "pxelinux"; | |
| option pxelinux.magic f1:00:74:7e; | |
| if exists dhcp-parameter-request-list { | |
| # Always send the PXELINUX options (specified in hexadecimal) | |
| option dhcp-parameter-request-list = concat(option dhcp-parameter-request-list,d0,d1,d2,d3); | |
| } | |
| option pxelinux.configfile = | |
| concat("pxelinux.cfg/", binary-to-ascii(16, 8, ":", hardware)); | |
| filename "/tftpboot/pxelinux.bin";</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>If you used this from a client whose Ethernet address was | |
| 58:FA:84:CF:55:0E, this would look for a configuration file named | |
| "/tftpboot/pxelinux.cfg/1:58:fa:84:cf:55:e".</p></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_known_issues">KNOWN ISSUES</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>The following problems are known with PXELINUX, so far:</p></div> | |
| <div class="ulist"><ul> | |
| <li> | |
| <p> | |
| The error recovery routine doesn’t work quite right. For right now, | |
| it just does a hard reset - seems good enough. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| We should probably call the UDP receive function in the keyboard | |
| entry loop, so that we answer ARP requests. | |
| </p> | |
| </li> | |
| <li> | |
| <p> | |
| Boot sectors/disk images are not supported yet. | |
| </p> | |
| </li> | |
| </ul></div> | |
| <div class="paragraph"><p>If you have additional problems, please contact the Syslinux mailing | |
| list (see syslinux.txt for the address.)</p></div> | |
| <div class="sect2"> | |
| <h3 id="_broken_pxe_stacks">Broken PXE stacks</h3> | |
| <div class="paragraph"><p>Lots of PXE stacks, especially old ones, have various problems of | |
| varying degrees of severity. Please see:</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>http://syslinux.zytor.com/hardware.php</code></pre> | |
| </div></div> | |
| <div class="olist lowerroman"><ol class="lowerroman"> | |
| <li> | |
| <p> | |
| for a list of currently known hardware problems, with workarounds | |
| if known. | |
| </p> | |
| </li> | |
| </ol></div> | |
| <div class="paragraph"><p>There are a number of extremely broken PXE stacks in the field. The | |
| gPXE project (formerly known as Etherboot) provides an open-source PXE | |
| stack that works with a number of cards, and which can be loaded from | |
| a CD-ROM, USB key, or floppy if desired.</p></div> | |
| <div class="paragraph"><p>Information on gPXE is available from:</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>http://www.etherboot.org/</code></pre> | |
| </div></div> | |
| <div class="olist lowerroman"><ol class="lowerroman"> | |
| <li> | |
| <p> | |
| and ready-to-use ROM or disk images from: | |
| </p> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>http://www.rom-o-matic.net/</code></pre> | |
| </div></div> | |
| </li> | |
| </ol></div> | |
| <div class="paragraph"><p>Some cards, like may systems with the SiS 900, has a PXE stack which | |
| works just barely well enough to load a single file, but doesn’t | |
| handle the more advanced items required by PXELINUX. If so, it is | |
| possible to use the built-in PXE stack to load gPXE, which can then | |
| load PXELINUX. See:</p></div> | |
| <div class="literalblock"> | |
| <div class="content"> | |
| <pre><code>http://www.etherboot.org/wiki/pxechaining</code></pre> | |
| </div></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_notes">NOTES</h2> | |
| <div class="sectionbody"> | |
| <div class="sect2"> | |
| <h3 id="_mtftp">MTFTP</h3> | |
| <div class="paragraph"><p>PXELINUX does not support MTFTP, and there are no plans of doing so, as | |
| MTFTP is inherently broken for files more than 65535 packets (about 92 | |
| MB) in size. It is of course possible to use MTFTP for the initial | |
| boot, if you have such a setup. MTFTP server setup is beyond the scope | |
| of this document.</p></div> | |
| </div> | |
| <div class="sect2"> | |
| <h3 id="_error_recovery">Error Recovery</h3> | |
| <div class="paragraph"><p>If the boot fails, PXELINUX (unlike SYSLINUX) will not wait forever; | |
| rather, if it has not received any input for approximately five | |
| minutes after displaying an error message, it will reset the machine. | |
| This allows an unattended machine to recover in case it had bad enough | |
| luck of trying to boot at the same time the TFTP server goes down.</p></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_see_also">SEE ALSO</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p><strong>syslinux.cfg</strong>(5), <strong>syslinux-cli</strong>(1), <strong>lilo</strong>(8), <strong>keytab-lilo.pl</strong>(8), | |
| <strong>fdisk</strong>(8), <strong>mkfs</strong>(8), <strong>superformat</strong>(1).</p></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_author">AUTHOR</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>This AsciiDoc derived document is a modified version of the original | |
| <strong>SYSLINUX</strong> documentation by H. Peter Anvin <<a href="mailto:[email protected]">[email protected]</a>>. The conversion | |
| to an AsciiDoc was made by Gene Cumm <<a href="mailto:[email protected]">[email protected]</a>></p></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div id="footnotes"><hr /></div> | |
| <div id="footer"> | |
| <div id="footer-text"> | |
| Last updated 2014-01-17 16:09:56 PST | |
| </div> | |
| </div> | |
| </body> | |
| </html> |