1<!-- 2 -- #ident "%Z%%M% %I% %E% SMI" 3 -- 4 CDDL HEADER START 5 6 The contents of this file are subject to the terms of the 7 Common Development and Distribution License, Version 1.0 only 8 (the "License"). You may not use this file except in compliance 9 with the License. 10 11 You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 12 or http://www.opensolaris.org/os/licensing. 13 See the License for the specific language governing permissions 14 and limitations under the License. 15 16 When distributing Covered Code, include this CDDL HEADER in each 17 file and include the License file at usr/src/OPENSOLARIS.LICENSE. 18 If applicable, add the following below this CDDL HEADER, with the 19 fields enclosed by brackets "[]" replaced with your own identifying 20 information: Portions Copyright [yyyy] [name of copyright owner] 21 22 CDDL HEADER END 23 24 -- Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 -- Use is subject to license terms.^M 26 --> 27<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> 28<html> 29 30<head> 31<title>DHCP Manager Help: DHCP Services</title> 32<meta NAME="AUTHOR" CONTENT="smorgan"> 33<meta NAME="KEYWORDS" CONTENT="DHCP"> 34 35</head> 36 37<body bgcolor="#FFFFFF"> 38 39<a name="top"></a> 40 41<table border=0 cellspacing=0 cellpadding=0 width=625> 42 43 44<!-- Start navigation banner --> 45 46<tr><td colspan=4 WIDTH="615" align="left" valign="top"><IMG SRC="art/bannersmc.gif" WIDTH=615 BORDER=0 ALT="DHCP Manager Help"> 47 48 </td> 49 </tr> 50 51<!-- End navigation banner --> 52 53 54<tr> 55 56<!-- Start contents block --> 57 58 <td colspan=1 valign="top" WIDTH="105"> 59 <P> </P> 60 <STRONG><A HREF="dhcp_main_top.html">Overview</A></STRONG><P> 61 62 <A HREF="dhcp_relay_ref.html"><STRONG>Servers and Relays</STRONG></A><BR> 63 <A HREF="dhcp_config_wiz.html">DHCP Config</A><BR> 64 <A HREF="dhcp_relay_config.html">BOOTP Config</A><BR> 65 <A HREF="dhcp_net_wiz.html">Net Config</A><BR> 66 <IMG SRC="art/tip2.gif" WIDTH=12 HEIGHT=10 BORDER=0 ALT="">DHCP Services<BR> 67 <a href="#hops"><EM>Hops</EM></a><BR> 68 <a href="#log"><EM>Verbose</EM></a><BR> 69 <a href="#trans"><EM>Log Trans</EM></a><BR> 70 <a href="#dupaddr"><EM>Detect Addr</EM></a><BR> 71 <a href="#rescan"><EM>Reload</EM></a><BR> 72 <a href="#dnsup"><EM>Update DNS</EM></a><BR> 73 <a href="#dnstime"><EM>Timeout DNS</EM></a><BR> 74 <a href="#cache"><EM>Cache</EM></a><BR> 75 <a href="#compat"><EM>BOOTP</EM></a><BR> 76 <a href="#inter"><EM>Interfaces</EM></a><BR> 77 <a href="#addrs"><EM>Addresses</EM></a><BR> 78 <A HREF="dhcp_relay_serv.html">BOOTP Services</A><P> 79 <A HREF="dhcp_addr_ref.html"><STRONG>Addresses</STRONG></A><P> 80 <A HREF="dhcp_macro_ref.html"><STRONG>Macros</STRONG></A><P> 81 <A HREF="dhcp_option_ref.html"><STRONG>Options</STRONG></A><P> 82<A HREF="dhcp_main_how.html"><STRONG>How To..</STRONG></A><P> 83 <A HREF="dhcp_main_menus.html"><STRONG>Menus</STRONG></A><P> 84<A HREF="dhcp_main_idx.html"><STRONG>Index</STRONG></A> 85 86 </td> 87 88<!-- End contents block --> 89 90<!-- Start column rule --> 91 92 <td colspan=1 width=5 bgcolor="#CCCCCC"> </td> 93 94<!-- End column spacer --> 95 96<!-- Start column spacer --> 97 98 <td colspan=1 width=10 bgcolor="#FFFFFF"> </td> 99 100<!-- End column spacer --> 101 102 103 104<!-- Start topic block --> 105 106<td colspan=1 valign="top" bgcolor="#ffffff" WIDTH="495"> 107 108<P> </P> 109 110<h1>Modifying Service Options <BR>on a DHCP Server</h1> 111 112After the initial configuration, choose Modify in the Service menu to customize additional settings for the DHCP server. Changes you make here become the default settings used by the server in this session and each subsequent session.<P> 113Use the Modify Service Options dialog box to configure the following options. 114<P> 115 116<table border=0 cellspacing=4 cellpadding=3 width=430> 117 118 <tr> 119 <td width=125 valign="top"><A NAME="hops"><STRONG>Maximum Relay Agent Hops</STRONG></A><br> 120 </td> 121 <td valign="top">Specify the maximum number of relay hops that can occur before the DHCP server drops the request. The default is 4. 122 </td> 123 </tr> 124 125 <TR> 126 <td width=145 valign="top"><A NAME="log"><STRONG>Verbose Log Messages</STRONG></A><br></td> 127 <td valign="top"> 128The DHCP daemon writes messages to the <TT>syslogd</TT> facility. 129In verbose mode, the DHCP daemon displays more messages than in non-verbose mode. This can reduce efficiency due to the time taken to write and display the messages. The default is for non-verbose mode. 130 </TD> 131 </tr> 132 133 <tr> 134 <td VALIGN=TOP WIDTH="145"><a name="trans"><STRONG>Log Transactions to syslog Facility</STRONG></A><br></td> 135 136<td valign="top"> 137Select whether to have the DHCP daemon log transactions using 138 <tt>syslogd</tt>, and select an integer from 0 through 7 to 139specify the local syslog facility. The local syslog facility can be used to selectively 140view transaction messages generated by the DHCP daemon. Transactions include 141all DHCP messages between the daemon and clients. This feature may be useful 142in troubleshooting problems with DHCP.</td> 143</tr> 144 145 146 147 <TR><TD VALIGN="top"><A NAME="dupaddr"><STRONG>Detect Duplicate IP Addresses</STRONG></A></TD> 148 149<TD>By default, the DHCP server pings an IP address before offering it to 150a DHCP or BOOTP client to verify that the address is not in use by 151another client. Uncheck the box to disable this action. (Disabling this feature is not recommended.)<BR></TD></TR> 152 153 154 <tr> 155 <td width=125 valign="top"><A NAME="rescan"><STRONG>Reload <tt>dhcptab</tt></STRONG></A></td> 156 <td valign="top"> 157Specify the interval, in minutes, that the DHCP server should use to schedule the rereading of the <tt>dhcptab</tt> information.<P> 158The DHCP server reads the <tt>dhcptab</tt> at startup and not again until told to do so.<p> 159Typically, the DHCP Manager causes the server to reread the <tt>dhcptab</tt> whenever you make a change to the data. The default is to turn off this option to avoid needless re-initialization of the <tt>dhcptab</tt>. 160 </td> 161 </tr> 162 163<tr> 164 <td width=125 valign="top"><A NAME="dnsup"><STRONG>Update DNS host information</STRONG></A></td> 165 <td valign="top"> 166Select this option if this DHCP server supports clients that can specify their host names, and you want to have those host names added to the DNS tables. The DNS server must be set up to accept update requests from the DHCP server. See the Solaris <em>DHCP Administration Guide</em> for more information.</td> 167 </tr> 168 169<tr> <td width=125 valign="top"><A NAME="dnstime"><STRONG>Timeout DNS update</STRONG></A></td> 170 <td valign="top"> 171Specify the number of seconds to wait for a response from the DNS server 172before timing out. The default is 15 seconds. This option is available only if you selected Update DNS host information.</tr> 173 <tr> 174 <td width=125 valign="top"><A NAME="cache"><STRONG>Cache Offers</STRONG></A> <br> 175 </td> 176 <td valign="top">Specify the number of seconds the server will hold open the offer to a client request for configuration. The default is 10 seconds.<P> 177You can increase this time to compensate for slow performance on a slow network. 178 </td> 179 </tr> 180 <tr> 181 <td width=145 valign="top"><A NAME="compat"><STRONG>BOOTP Compatibility</STRONG></A><br> 182 </td> 183 <td valign="top">Select whether to allow the DHCP server to operate in BOOTP compatibility mode. In this mode, the DHCP server will respond to requests for configuration from BOOTP clients. 184 185<table border=0 cellspacing=3 cellpadding=3 width=300> 186<TR> 187<TD width=80 valign="top"><B>None</b></TD> 188<td valign="top">Do not support BOOTP clients.<P></TD> 189</TR> 190 191<TR> 192<TD WIDTH="80" VALIGN="TOP"><strong>Automatic</strong></TD> 193<TD>Automatically allocate permanent IP addresses to any requesting BOOTP clients.</TD> 194</TR> 195 196<TR> 197<TD WIDTH="80" VALIGN="TOP"><b>Manual</b></TD> 198<TD>Respond only to clients that have been assigned a reserved address in the server's network tables.</TD> 199</TR> 200</table> 201 202 </td> 203 </tr> 204 205 <tr> 206 <td width=125 valign="top"><A NAME="inter"><STRONG>Interfaces</STRONG></A></td> 207 <td valign="top">Click the Interfaces tab to choose which network interfaces the DHCP server will monitor.<P> The interfaces are listed by device name and network IP address. Use the arrow keys to remove or restore a network interface to the list of monitored interfaces.<P> The default is to allow the server to monitor all network interfaces. 208 209 </td> 210 211 </tr> 212 213 <tr> 214 <td width=125 valign="top"><A NAME="addrs"><STRONG>Addresses</STRONG></A></td> 215 <td valign="top">Click the Addresses tab to choose which server addresses the DHCP server will own.<P> The DHCP server will manage all client records that are owned by the server addresses listed.<P> The default is to manage records owned by the server's primary IP address. 216 217 </td> 218 219 </tr> 220 221 222 223 224</table> 225 <A HREF="#top"><small>return to top</small></A> 226 227 228 229 230<p> </p> 231 232 233 234<!-- Don't go past this line! --> 235 236 </td> 237 238<!-- End topic block --> 239 240</tr> 241 242</table> 243 244<!-- End topic table --> 245 246</body> 247</html> 248
