NAME
dhcp6ctl - DHCPv6 client and server control utility
SYNOPSIS
dhcp6ctl [-C -| -S] [-k keyfile] [-p port] [-s address] command
DESCRIPTION
dhcp6ctl controls the operation of a DHCPv6 process, which is either
dhcp6c or dhcp6s, a DHCPv6 client or a server. By default, dhcp6ctl
controls a client. The type of the process can also be specified
explicitly by the -C or -S options.
dhcp6ctl communicates with the DHCPv6 process over a TCP connection,
sending commands authenticated with digital signatures. Currently, the
only supported authentication algorithm is HMAC-MD5, which uses a shared
secret on each end of the connection.
Command line options are as below:
-C Control a DHCPv6 client. This option is exclusive with the -S
option.
-S Control a DHCPv6 server. This option is exclusive with the -C
option.
-k keyfile
Use keyfile to provide the shared secret to communicate with the
process. The default file name used when unspecified is
/etc/wide-dhcpv6/dhcp6cctlkey with a client, and
/etc/wide-dhcpv6/dhcp6sctlkey with a server.
-p port
Specify port as the listening port of the process. The default
port number used when unspecified is 5546 for a client, and 5547
for a server.
-s address
Specify address as the listening address of the process. The
default address used when unspecified is ::1.
KEY FILE
Since the operation available with the dhcp6ctl command is powerful, the
communication between the command and dhcp6c or dhcp6s must be
authenticated. The supported algorithm for authentication is HMAC-MD5,
which requires a shared secret, and the secret is stored in the key file.
The key file must consist of a single line, in which the secret value is
written in the form of BASE-64 encoding.
COMMANDS
Each command specifies a single control operation. Supported commands
are as follows:
reload This command specifies the process to reload the configuration
file. Existing bindings, if any, are intact.
remove arguments
This command is only applicable to a server. This specifies the
server to remove a run-time object specified by arguments from
the server. Currently, the only possible object is one
particular IA_NA or IA_PD binding, which is specified as ‘binding
IA IA_NA IAID DUID’ or ‘binding IA IA_PD IAID DUID’ where IAID is
a decimal number specifying the IAID of the IA, and DUID is a
DHCP Unique Identifier of the binding. The format of DUID is the
same as that specified in dhcp6s.conf(5).
start interface ifname
This command is only applicable to a client. It tells the client
to release the current configuration information (if any) on the
interface ifname and restart the DHCPv6 configuration process on
the interface.
stop interface ifname
This command is only applicable to a client. It tells the client
to release the current configuration information (if any) on the
interface ifname. Any timer running for the interface will be
stopped, and no more DHCPv6 messages will be sent on the
interface. The configuration process can later be restarted by
the start command.
stop This command stops the specified process. If the process is a
client, it will release all configuration information (if any)
and exits.
FILES
/etc/wide-dhcpv6/dhcp6cctlkey is the default key file to communicate
with a client.
/etc/wide-dhcpv6/dhcp6sctlkey is the default key file to communicate
with a server.
SEE ALSO
dhcp6s.conf(5) dhcp6s(8)
HISTORY
The dhcp6ctl command first appeared in WIDE/KAME IPv6 protocol stack kit.