📄 dhcpcd.html
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head> <title></title> <link rel="stylesheet" media="screen" type="text/css" href="./style.css" /> <link rel="stylesheet" media="screen" type="text/css" href="./design.css" /> <link rel="stylesheet" media="print" type="text/css" href="./print.css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body><a href=start.html>start</a></br><div class="toc"><div class="tocheader toctoggle" id="toc__header">Table of Contents</div><div id="toc__inside"><ul class="toc"><li class="level1"><div class="li"><span class="li"><a href="#dynamic_host_configuration_protocol" class="toc">Dynamic Host Configuration Protocol</a></span></div><ul class="toc"><li class="level2"><div class="li"><span class="li"><a href="#what_is_dhcp" class="toc">What is DHCP</a></span></div></li><li class="level2"><div class="li"><span class="li"><a href="#howto_man_pages" class="toc">HowTo & man pages</a></span></div></li><li class="level2"><div class="li"><span class="li"><a href="#dhcp_clients_in_uclinux" class="toc">DHCP clients in uClinux</a></span></div><ul class="toc"><li class="level3"><div class="li"><span class="li"><a href="#dhcp_client_options" class="toc">DHCP Client Options</a></span></div></li><li class="level3"><div class="li"><span class="li"><a href="#using_the_dhcp_client" class="toc">Using the DHCP client</a></span></div></li></ul></li><li class="level2"><div class="li"><span class="li"><a href="#dhcp_servers_in_uclinux" class="toc">DHCP Servers in uClinux</a></span></div><ul class="toc"><li class="level3"><div class="li"><span class="li"><a href="#dhcp_server_options" class="toc">DHCP Server Options</a></span></div></li></ul></li><li class="level2"><div class="li"><span class="li"><a href="#for_more_information" class="toc">For More Information</a></span></div></li></ul></li></ul></div></div><h1><a name="dynamic_host_configuration_protocol" id="dynamic_host_configuration_protocol">Dynamic Host Configuration Protocol</a></h1><div class="level1"></div><!-- SECTION [1-51] --><h2><a name="what_is_dhcp" id="what_is_dhcp">What is DHCP</a></h2><div class="level2"><p>DHCP’s purpose is to enable individual computers (the ‘DHCP client’) on an IP network to extract their configurations from a server (the ‘DHCP server’) or servers, in particular, servers that have no exact information about the individual computers until they request the information. The overall purpose of this is to reduce the work necessary to administer a large IP network. The most significant piece of information distributed in this manner is the IP address. </p><p>DHCP was created by the Dynamic Host Configuration Working Group of the Internet Engineering Task Force (IETF; a volunteer organization which defines protocols for use on the Internet). As such, it’s definition is recorded in an Internet RFC and the Internet Activities Board (IAB) is asserting its status as to Internet Standardization. </p></div><!-- SECTION [52-885] --><h2><a name="howto_man_pages" id="howto_man_pages">HowTo & man pages</a></h2><div class="level2"><p>There are Howtos and man pages avalible for desktop dhcp client and servers:</p><ul><li class="level1"><div class="li"> <a href="http://www.tldp.org/HOWTO/DHCP/index.html" class="urlextern" title="http://www.tldp.org/HOWTO/DHCP/index.html" rel="nofollow">DHCP mini-HOWTO</a></div><ul><li class="level2"><div class="li"> <a href="http://www.tldp.org/HOWTO/DHCP/x74.html" class="urlextern" title="http://www.tldp.org/HOWTO/DHCP/x74.html" rel="nofollow">Client Setup</a></div></li><li class="level2"><div class="li"> <a href="http://www.tldp.org/HOWTO/DHCP/x369.html" class="urlextern" title="http://www.tldp.org/HOWTO/DHCP/x369.html" rel="nofollow">Server Setup</a></div></li></ul></li></ul></div><!-- SECTION [886-1186] --><h2><a name="dhcp_clients_in_uclinux" id="dhcp_clients_in_uclinux">DHCP clients in uClinux</a></h2><div class="level2"></div><!-- SECTION [1187-1225] --><h3><a name="dhcp_client_options" id="dhcp_client_options">DHCP Client Options</a></h3><div class="level3"><p>There are a few options for dhcp clients in uClinux, depending on the features and size of the application you are looking for.</p><ul><li class="level1"><div class="li"> <code>./user/dhcpcd-new</code> : dhcpcd-1.3.20-pl0 (04/06/2001) maintained by Sergei Viznyuk, <a href="http://www.phystech.com/download/dhcpcd.html" class="urlextern" title="http://www.phystech.com/download/dhcpcd.html" rel="nofollow">web site</a> <strong>DEFAULT</strong></div></li><li class="level1"><div class="li"> <code>./user/dhcpcd</code> : dhcpcd-0.70 writen by Yoichi Hariguchi</div></li><li class="level1"><div class="li"> <code>./user/dhcp-isc</code> : Internet Systems Consortium reference implementation Version 2 Patchlevel 5, (September 6, 2000) <a href="http://www.isc.org/index.pl?/sw/dhcp/" class="urlextern" title="http://www.isc.org/index.pl?/sw/dhcp/" rel="nofollow">web site</a></div></li><li class="level1"><div class="li"> <code>./busybox/networking/udhcp/</code> : Busybox has a <a href="http://www.busybox.net/downloads/BusyBox.html#item_udhcpc" class="urlextern" title="http://www.busybox.net/downloads/BusyBox.html#item_udhcpc" rel="nofollow">dhcp client</a></div></li></ul><p> All the DHCP clients have their own <code>README</code> files in the directories in cvs, but should be able to be built by selecting them in the menuconfiguration system.</p></div><!-- SECTION [1226-2069] --><h3><a name="using_the_dhcp_client" id="using_the_dhcp_client">Using the DHCP client</a></h3><div class="level3"><p>Depending on which client you have selected, this example may be slightly different - this is the default from <code>./user/dhcpcd-new</code>. To use the dhcp client deamon in uClinux, it is pretty easy:</p><ol><li class="level1"><div class="li"> Check to see if networking is configured:<pre class="code">root:~> ifconfiglo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0</pre></div></li><li class="level1"><div class="li"> run the dhcp client deamon, and put it in the background:<pre class="code">root:~> dhcpcd &28</pre><p>The 28 means that the process id of the dhcpcd is 28.</p></div></li><li class="level1"><div class="li"> check on the network, to make sure the dhcp client has recieved a IP number:<pre class="code">root:~> ifconfigeth0 Link encap:Ethernet HWaddr C6:FB:5F:FA:AE:31 inet addr:10.64.204.139 Bcast:10.64.204.255 Mask:255.255.255.0 UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14 errors:0 dropped:0 overruns:0 frame:0 TX packets:15 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0</pre></div></li><li class="level1"><div class="li"> You can check on other things as well:<pre class="code">root:~> cat /etc/dhcpc/dhcpcd-eth0.infoIPADDR=10.64.204.141NETMASK=255.255.255.0NETWORK=10.64.204.0BROADCAST=10.64.204.255GATEWAY=10.64.204.1DOMAIN=ad.analog.comDNS=10.64.53.110,10.64.51.110,10.66.5.110,10.64.82.11DHCPSID=10.64.204.245DHCPGIADDR=0.0.0.0DHCPSIADDR=0.0.0.0DHCPCHADDR=EA:24:5B:7B:B8:20DHCPSHADDR=00:D0:B7:74:C9:BEDHCPSNAME=LEASETIME=259200RENEWALTIME=129600REBINDTIME=226800</pre><p>This indicates the networking settings the dhcp client has received from the dhcp server. If you are using a non-volitale file system, sometimes bad data in the <code>/etc/dhcpc</code> directory can cause the dhcp client not to ask the server for the correct information, and the best thing is to remove the files in this directory.</p></div></li></ol></div><!-- SECTION [2070-4373] --><h2><a name="dhcp_servers_in_uclinux" id="dhcp_servers_in_uclinux">DHCP Servers in uClinux</a></h2><div class="level2"></div><!-- SECTION [4374-4410] --><h3><a name="dhcp_server_options" id="dhcp_server_options">DHCP Server Options</a></h3><div class="level3"><p>There are a few options for dhcp servers in uClinux, depending on the features and size of the application you are looking for.</p><p><img src="images/smileys/fixme.gif" align="middle" alt="FIXME" />!</p></div><!-- SECTION [4411-4577] --><h2><a name="for_more_information" id="for_more_information">For More Information</a></h2><div class="level2"><p> There are many sites on the internet which are dedicated to DHCP. Here are a few good ones:</p><ul><li class="level1"><div class="li"> <a href="http://www.dhcp-handbook.com/" class="urlextern" title="http://www.dhcp-handbook.com/" rel="nofollow">THE DHCP HANDBOOK</a></div></li><li class="level1"><div class="li"> <a href="http://www.dhcp.org/" class="urlextern" title="http://www.dhcp.org/" rel="nofollow">Resources for DHCP</a></div></li><li class="level1"><div class="li"> <a href="http://www.isc.org/index.pl?/sw/dhcp/" class="urlextern" title="http://www.isc.org/index.pl?/sw/dhcp/" rel="nofollow">Internet Systems Consortium reference implementation of all aspects of DHCP</a></div></li></ul></div><!-- SECTION [4578-] --></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -