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   2 .\" Copyright 2014 Garrett D'Amore <garrett@damore.org>
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   7 .TH DHCP 5 "Feb 13, 2020"
   8 .SH NAME
   9 dhcp \- Dynamic Host Configuration Protocol
  11 Dynamic Host Configuration Protocol (\fBDHCP\fR) enables host systems in a
  12 \fBTCP/IP\fR network to be configured automatically for the network as they
  13 boot. \fBDHCP\fR uses a client/server mechanism: servers store configuration
  14 information for clients, and provide that information upon a client's request.
  15 The information can include the client's \fBIP\fR address and information about
  16 network services available to the client.
  17 .LP
  18 This manual page provides a brief summary of the \fBDHCP\fR
  19 implementation.
  20 .SS "DHCP Client"
  21 The DHCP client is implemented as background daemon,
  22 \fBdhcpagent\fR(1M).
  23 .LP
  24 For IPv4, this daemon is started automatically during bootup if there exists at
  25 least one \fBdhcp.\fR\fIinterface\fR file in \fB/etc\fR. Only interfaces with a
  26 corresponding \fB\fR\fB/etc/dhcp.\fR\fB\fIinterface\fR\fR file are
  27 automatically configured during boot.
  28 .LP
  29 For IPv6, this daemon is started automatically when commanded by \fBin.ndpd\fR
  30 (based on IPv6 Routing Advertisement messages). No
  31 \fB/etc/dhcp\fR.\fIinterface\fR file is necessary, but such a file can be used
  32 to specify an interface as "primary," provided that IPv4 DHCP is also in use.
  33 .LP
  34 Network parameters needed for system configuration during bootup are extracted
  35 from the information received by the daemon through the use of the
  36 \fBdhcpinfo\fR(1) command. The daemon's default behavior can be altered by
  37 changing the tunables in the \fB/etc/default/dhcpagent\fR file. The daemon is
  38 controlled by the \fBifconfig\fR(1M) utility. Check the status of the daemon
  39 using the \fBnetstat\fR(1M) and \fBifconfig\fR(1M) commands.
  41 \fBdhcpinfo\fR(1), \fBdhcpagent\fR(1M),
  42 \fBifconfig\fR(1M),
  43 \fBin.ndpd\fR(1M), \fBnetstat\fR(1M),
  44 \fBsyslog\fR(3C),
  45 \fBdhcp_inittab\fR(4), \fBndpd.conf\fR(4)
  46 .LP
  47 Alexander, S., and R. Droms. \fIRFC 2132, DHCP Options and BOOTP Vendor
  48 Extensions\fR. Silicon Graphics, Inc. Bucknell University. March 1997.
  49 .LP
  50 Droms, R. \fIRFC 1534, Interoperation Between DHCP and BOOTP\fR. Bucknell
  51 University. October 1993.
  52 .LP
  53 Droms, R. \fIRFC 2131, Dynamic Host Configuration Protocol\fR. Bucknell
  54 University. March 1997.
  55 .LP
  56 Wimer, W. \fIRFC 1542, Clarifications and Extensions for the Bootstrap
  57 Protocol\fR. Carnegie Mellon University. October 1993.
  58 .LP
  59 Lemon, T. and B. Sommerfeld. \fIRFC 4361, Node-specific Client Identifiers for
  60 Dynamic Host Configuration Protocol Version Four (DHCPv4)\fR. Nominum and Sun
  61 Microsystems. February 2006.
  62 .LP
  63 Droms, R. \fIRFC 3315, Dynamic Host Configuration Protocol for IPv6
  64 (DHCPv6)\fR. Cisco Systems. July 2003.