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.TH dhcp6c 8 "17 March 2003" "dhcp6c" "Linux System Manager's Manual"

.SH NAME
dhcp6c \- DHCPv6 client daemon

.SH SYNOPSIS
.in +.5i
.ti -.5i
dhcp6c
\%[\-dDf]
\%[\-r all | <ipv6 addresses>]
\%[\-R <ipv6 addresses>]
\%[\-c <configuration file>]
\%[\-I] interface
.in -.5i

.SH DESCRIPTION
.B dhcp6c
is an implementation of the DHCPv6 client.

Using DHCPv6 messages and DHCPv6 options, 
.B dhcp6c
is used to request and configure IPv6 addresses and host network configuration 
information (i.e. DNS) for a network interface from the DHCPv6 server. It can
also be used as a requesting router to request and configure Prefix Delegation 
for a subnet.

The assigned IPv6 addresses and prefixes are saved as
/var/lib/dhcpv6/client6.leasesXXXXXX; this file is used to request the same 
addresses and prefixes from the DHCPv6 server. Each
.B dhcp6c
client has a client DHCP Unique Identifier (DUID); the DUID file is saved as
/var/lib/dhcpv6/dhcp6c_duid.
The
.B dhcp6c
client configuration is defined in /etc/dhcp6c.conf.

.SH OPTIONS
.TP
.BI \-c\ <configuration\ file>
Specifies the configuration file for 
.B dhcp6c

.TP
.BI \-d
Enables
.B dhcp6c
to print debug messages.

.TP
.BI \-D
Enables
.B dhcp6c
to print verbose debug messages.

.TP
.BI \-f
Enables
.B dhcp6c
to work as a foreground application.
This option is helpful for debugging.

.TP
.BI \-I
Allows
.B dhcp6c
to request network information only.

.TP
.BI \-r\ <all\ |\ ipv6\ addresses>
Allows
.B dhcp6c
to release the addresses.
This option is used only when releasing addresses explicitly.

.TP
.BI \-R\ <ipv6\ addresses>
Allows
.B dhcp6c
to request the specified addresses.

.SH FILES
.TP
.BI dhcp6c.conf
Contains DHCPv6 client configuration information.

.TP
.BI dhcp6c_duid
Contains DHCPv6 client DUID.

.TP
.BI client6_leasesXXXXXX
Contains DHCPv6 client assigned IPv6 addresses and prefixes.

.SH ERRORS
Check /var/log/messages if there are errors.

.SH SEE ALSO
Dynamic Host Configuration Protocol for IPv6 (DHCPv6), IPv6 Prefix Options
for DHCPv6, dhcp6c.conf(5)

.SH BUGS
none

.SH AUTHORS
.LP
Kazuo Hiekata <hiekata@yamato.ibm.com>
.LP
Shirley Ma <xma@us.ibm.com>