dhcpmgr/help/dhcp_option_tags.html

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	<P>&nbsp;</P>

	<A HREF="dhcp_main_top.html"><STRONG>Overview</STRONG></A><P>
	<A HREF="dhcp_relay_ref.html"><STRONG>Servers and Relays</STRONG></A><P>
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<IMG SRC="art/tip2.gif" WIDTH=12 HEIGHT=10 BORDER=0 ALT="">	<A name="#tags">Standard Options</A><P>


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<h1>Standard Options</h1>

The standard DHCP options are defined by a short name (or tag), which is a mnemonic.  The names are listed below with their code number, name, data type, and description. <P>

<P><HR NOSHADE><P>

	<table border=0 cellspacing=3 cellpadding=3>

	<tr>
	<td valign="top"><a name="numb"><STRONG>Code</STRONG></a></td>
<td width=80 valign="top"><a name="tag"><STRONG>Name</STRONG></a></td>
<td width=50 valign="top"><a name="type"><STRONG>Type</STRONG></a></td>
	<td valign="top"><a name="descr"><STRONG>Description</STRONG></a></td>
	</tr>

<tr>
<td valign="top">1</td>
<td valign="top">Subnet</td>
<td valign="top">IP</td>
<td valign="top">Subnet mask, dotted Internet address</td></TR>

<TR><td valign="top">2</td>
<td valign="top">UTCoffst</td>
<td valign="top">Number</td>
<td valign="top">Coordinated universal Number offset (seconds)</td> </TR>

<TR><td valign="top">3</td>
<td valign="top">Router</td>
<td valign="top">IP</td>
<td valign="top">List of routers</td></TR>

<TR><td valign="top">4 </td>
<td>Timeserv</td>
<td valign="top">IP</td>
<td>List of RFC-868 servers</td></TR>

<TR><td valign="top">5</td>
<td valign="top">IEN116ns</td>
<td valign="top">IP</td>
<td valign="top">List of IEN-116 name servers</td></TR>

<TR><td valign="top">6</td>
<td valign="top">DNSserv</td><td valign="top">IP</td>
<td valign="top">List of DNS name servers</td></TR>

<TR><td valign="top">7</td>
<td valign="top">Logserv </td>
<td valign="top">IP</td>
<td valign="top">List of MIT-LCS UDP log servers</td></tr>

<TR><td valign="top">8</td>
<td valign="top">Cookie</td>
<td valign="top">IP</td>
<td valign="top">List of RFC-865 cookie servers</td></tr>

<TR><td valign="top">9</td>
<td valign="top">Lprserv</td>
<td valign="top">IP</td>
<td valign="top">List of RFC-1179 line printer servers</td></tr>

<TR><td valign="top">10</td>
<td valign="top">Impress</td>
<td valign="top">IP</td>
<td valign="top">List of Imagen Impress servers</td></tr>

<TR><td valign="top">11</td>
<td valign="top">Resource</td>
<td valign="top">IP</td>
<td valign="top">List of RFC-887 resource location servers</td></tr>

<TR><td valign="top">12</td>
<td valign="top">Hostname</td>
<td valign="top">Boolean</td>
<td valign="top">Return client's host name, value from hosts database</td></tr>

<TR><td valign="top">13</td>
<td valign="top">Bootsize</td>
<td valign="top">Number</td>
<td valign="top">Number of 512 octet blocks in boot image</td></TR>

<TR><td valign="top">14</td>
<td valign="top">Dumpfile</td>
<td valign="top">ASCII</td>
<td valign="top">Path where core image should be dumped</td></TR>

<TR><td valign="top">15</td>
<td valign="top">DNSdmain</td>
<td valign="top">ASCII</td>
<td valign="top">DNS domain name</td></TR>

<TR><td valign="top">16</td>
<td valign="top">Swapserv </td>
<td valign="top">IP</td>
<td valign="top">Client's swap server</td></TR>

<TR><td valign="top">17</td>
<td valign="top">Rootpath</td>
<td valign="top">ASCII</td>
<td valign="top">Client's root path</td></TR>

<TR><td valign="top">18</td>
<td valign="top">ExtendP</td>
<td valign="top">ASCII</td>
<td valign="top">Extensions path</td></TR>

<TR><td valign="top">19 </td>
<td valign="top">IpFwdF</TD>
<TD>Number</td>
<td valign="top">IP forwarding enable/disable (1/0)</td></TR>

<TR><td valign="top">20</td>
<td valign="top">NLrouteF</td>
<td valign="top">Number</td>
<td valign="top">Non-local source routing</td></TR>

<TR><td valign="top">21</td>
<td valign="top">PFilter</td>
<td valign="top">IP</td>
<td valign="top">Policy filter</td></TR>

<TR><td valign="top">22</td>
<td valign="top">MaxIpSiz</td>
<td valign="top">Number</td>
<td valign="top">Maximum datagram reassembly size</td></TR>

<TR><td width=10 valign="top">23</td>
<td valign="top">IpTTL</td>
<td valign="top">Byte</td>
<td valign="top">Default IP time to live (1=&lt; x &lt;=225)</td></TR>

<TR><td width=10 valign="top">24</td>
<td valign="top">PathTO</td>
<td valign="top">Number</td>
<td valign="top">RFC-1191 Path MTU aging timeout</td></TR>

<TR><td width=10 valign="top">25</td>
<td valign="top">PathTbl</td>
<td valign="top">Number</td>
<td valign="top">RFC-1191 Path MTU plateau table</td></TR>

<TR><td width=10 valign="top">26</td>
<td valign="top">MTU</td>
<td valign="top">Number</TD>
<TD>Interface MTU, (x &lt;=68)</td></TR>

<TR><td valign="top">27</td>
<td valign="top">SameMtuF</td>
<td valign="top">Number </td>
<td valign="top">All subnets are local</td></TR>

<TR><td valign="top">28</td>
<td valign="top">Broadcst</td>
<td valign="top">IP</td>
<td valign="top">Broadcast address</td></TR>

<TR><td valign="top">29</td>
<td valign="top">MaskDscF</td>
<td valign="top">Number</td>
<td valign="top">Perform mask discovery</td></TR>

<TR><td width=10 valign="top">30</td>
<td valign="top">MaskSupF</td>
<td valign="top">Number</td>
<td valign="top">Mask supplier</td></TR>

<TR><td width=10 valign="top">31</td>
<td valign="top">RDiscvyF</td>
<td valign="top">Number</td>
<td valign="top">Perform route discovery</td></TR>

<TR><td valign="top">32</td>
<td valign="top">RSolictS</td>
<td valign="top">IP</td>
<td valign="top">Router solicitation address</td></TR>

<TR><td valign="top">33</td>
<td valign="top">StaticRt</td>
<td valign="top">IP</td>
<td valign="top">Static routes, double IP (network router)</td></TR>

<TR><td valign="top">34</td>
<td valign="top">TrailerF</td>
<td valign="top">Number</td>
<td valign="top">Trailer encapsulation</td></TR>

<TR><td valign="top">35</td>
<td valign="top">ArpTimeO</td>
<td valign="top">Number</td>
<td valign="top">Arp cache timeout</td></TR>

<TR><td valign="top">36</td>
<td valign="top">EthEncap</td>
<td valign="top">Number</td>
<td valign="top">Ethernet encapsulation</td></TR>

<TR><td valign="top">37</td>
<td valign="top">TcpTTL</td>
<td valign="top">Number</td>
<td valign="top">TCP default time to live</td></TR>

<TR><td valign="top">38</td>
<td valign="top">TcpKaInt</td>
<td valign="top">Number</td>
<td valign="top">TCP keep alive interval</td></TR>

<TR><td valign="top">39</td>
<td valign="top">TcpKaGbF</td>
<td valign="top">Number</td>
<td valign="top">Keep alive garbage</td></TR>

<TR><td valign="top">40</td>
<td valign="top">NISdmain</td>
<td valign="top">ASCII</td>
<td valign="top">NIS domain_ name</td></TR>

<TR><td valign="top">41</td>
<td valign="top">NISservs</td>
<td valign="top">IP</td>
<td valign="top">List of NIS servers</td></TR>

<TR><td valign="top">42</td>
<td valign="top">NTPservs</td>
<td valign="top">IP</td>
<td valign="top">List of NTP servers</td></TR>

<TR><td valign="top">44 </td>
<td valign="top">NetBNms</td>
<td valign="top">IP</td>
<td valign="top">List of Netbios name servers</td></TR>

<TR><td valign="top">45</td>
<td valign="top">NetBDsts </td>
<td valign="top">IP</td>
<td valign="top">List of Netbios distribution servers</td></TR>

<TR><td valign="top">46</td>
<td valign="top"> NetBNdT</td>
<td valign="top">Number</td>
<td valign="top">Netbios node type (1=B-node, 2=P, 4=M, 8=H)</td></TR>

<TR><td valign="top">47</td>
<td valign="top">NetBScop</td>
<td valign="top">ASCII</td>
<td valign="top">Netbios scope</td></TR>

<TR><td valign="top">48</td>
<td valign="top">XFontSrv</td>
<td valign="top">IP</td>
<td valign="top">List of X Window font servers</td></TR>

<TR><td valign="top">49</td>
<td valign="top">XDispMgr</td>
<td valign="top">IP</td>
<td valign="top">X Window display managers</td></TR>


<TR><td valign="top">51</td>
<td valign="top">LeaseTim</td>
<td valign="top">Number</td>
<td valign="top">Lease time policy</td></TR>

<TR><td valign="top">56</td>
<td valign="top">Message</td>
<td valign="top">ASCII</td>
<td valign="top">Message to be displayed on client</td></TR>

<TR><td valign="top">58</td>
<td valign="top">T1Time</td>
<td valign="top">Number</td>
<td valign="top">Renewal (T1) time</td></TR>

<TR><td valign="top">59</td>
<td valign="top">T2Time</td>
<td valign="top">Number</td>
<td valign="top">Rebinding (T2) time</td></TR>

<TR><td valign="top">62</td>
<td valign="top">NW_dmain</td>
<td valign="top">ASCII</td>
<td valign="top">Netware/IP domain name</td></TR>

<TR><td valign="top">63</td>
<td valign="top">NWIPOpts</td>
<td valign="top">Octet</td>
<td valign="top">Netware/IP options</td></TR>

<TR><td valign="top">64</td>
<td valign="top">NIS+dom</td>
<td valign="top">ASCII</td>
<td valign="top">NIS+ domain name</td></TR>

<TR><td valign="top">65</td>
<td valign="top">NIS+serv</td>
<td valign="top">IP</td>
<td valign="top">List of NIS+ servers</td></TR>

<TR><td valign="top">66</td>
<td valign="top">TFTPsrvN</td>
<td valign="top">ASCII</td>
<td valign="top">Trivial File Transfer Protocol (TFTP) server hostname</td></TR>

<TR><td valign="top">67</td>
<td valign="top">OptBootF</td>
<td valign="top">ASCII</td>
<td valign="top">Optional bootfile name</td></TR>

<TR><td valign="top">68</td>
<td valign="top">MblIPAgt</td>
<td valign="top">IP</td>
<td valign="top">Mobile IP home agents</td></TR>

<TR><td valign="top">69</td>
<td valign="top">SMTPserv  </td>
<td valign="top">IP</td>
<td valign="top">Simple Mail Transport Protocol (SMTP) server</td></TR>

<TR><td valign="top">70</td>
<td valign="top">POP3serv</td>
<td valign="top">IP</td>
<td valign="top">Post Office Protocol (POP3) server</td></TR>

<TR><td valign="top">71</td>
<td valign="top">NNTPserv</td>
<td valign="top">IP</td>
<td valign="top">Network News Transport Protocol (NNTP) server</td></TR>

<TR><td valign="top">72</td>
<td valign="top">WWWservs</td>
<td valign="top">IP</td>
<td valign="top">Default World Wide Web server</td></TR>

<TR><td valign="top">73</td>
<td valign="top">Fingersv</td>
<td valign="top">IP</td>
<td valign="top">Default finger server</td></TR>

<TR><td valign="top">74</td>
<td valign="top">IRCservs</td>
<td valign="top">IP</td>
<td valign="top">Internet Relay Chat (IRC) server</td></TR>

<TR><td valign="top">75</td>
<td valign="top">STservs </td>
<td valign="top">IP</td>
<td valign="top">StreetTalk server</td></TR>

<TR><td valign="top">76</td>
<td valign="top">STDAservs</td>
<td valign="top">IP</td>
<td valign="top">StreetTalk directory assistance server</td></TR>

<TR><td valign="top">77</td>
<td valign="top">UserClas</td>
<td valign="top">ASCII</td>
<td valign="top">User class information</td></TR>

<TR><td valign="top">78</td>
<td valign="top">SLP_DA</td>
<td valign="top">Octet</td>
<td valign="top">Directory agent</td></TR>

<TR><td valign="top">79</td>
<td valign="top">SLP_SS</td>
<td valign="top">Octet</td>
<td valign="top">Service scope</td></TR>

<TR><td valign="top">82</td>
<td valign="top">AgentOpt</td>
<td valign="top">Octet</td>
<td valign="top">Agent circuit ID</td></TR>

<TR><td valign="top">89</td>
<td valign="top">FQDN</td>
<td valign="top">Octet</td>
<td valign="top">Fully Qualified Domain Name</td></TR>

<TR><td valign="top">93</td>
<td valign="top">PXEarch</td>
<td valign="top">Number</td>
<td valign="top">Client system architecture</td></TR>

<TR><td valign="top">94</td>
<td valign="top">PXEnii</td>
<td valign="top">Octet</td>
<td valign="top">Client Network Device Interface</td></TR>

<TR><td valign="top">97</td>
<td valign="top">PXEcid</td>
<td valign="top">Octet</td>
<td valign="top">UUID/GUID-based client identifier</td></TR>

<TR><td valign="top">N/A</td>
<td valign="top">BootFile</td>
<td valign="top">ASCII</td>
<td valign="top">File to boot</td></TR>

<TR><td valign="top">N/A</td>
<td valign="top">BootSrvA</td>
<td valign="top">IP</td>
<td valign="top">Boot server</td></TR>

<TR><td valign="top">N/A</td>
<td valign="top">BootSrvN</td>
<td valign="top">ASCII</td>
<td valign="top">Boot server host name</td></TR>

<TR><td valign="top">NA</td>
<td valign="top">LeaseNeg</td>
<td valign="top">Boolean</td>
<td valign="top">Lease is negotiable flag (present=true)</td></TR>

<TR><td valign="top">NA</td>
<td valign="top">Include</td>
<td valign="top">ASCII</td>
<td valign="top">Include listed macro values in this macro</td></TR>

</table>

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