dhcpcd6 Daemon
Purpose
Implements a Dynamic Host Configuration Protocol for IPv6 (DHCPv6) client. Obtains IPv6 addresses and configuration information for an IPv6 node from the DHCPv6 server.
Syntax
To start a DHCPv6 client by using the System Resource Controller (SRC):
startsrc -s dhcpcd6 [-a Argument] ...
To start a DHCPv6 client without using SRC:
dhcpcd6 [-f ConfigurationFileName] [-u Client_duid_File] [-p ClientPort] [-t SolicitTimeout]
Description
The dhcpcd6 daemon implements a DHCPv6 client by setting up IPv6 (Internet Protocol version 6) addresses and other parameters by using the DHCPv6 protocol.
The dhcpcd6 daemon is normally started by the /etc/rc.net file that normally runs at boot time. By default, it is commented out and not run on machine startup. The dhcpcd6 daemon runs in the background while the system is up.
The dhcpcd6 daemon reads its configuration file and attempts to bring up and get one or more IPv6 addresses and other configuration options for the interfaces specified within the configuration file. The addresses that are obtained from the server are renewed as mandated by the server.
When a DHCPv6 client does not need to have a DHCPv6 server assign it IPv6 addresses, the client can obtain only configuration information such as a list of available DNS servers or NTP servers. It is useful when the node is configured with static addresses.
The refresh command can be used to cause the dhcpcd6 daemon to reread the configuration file. A SIGHUP might also be used to get the same response.
The default dhcpcd6 configuration file is /etc/dhcpv6/dhcpc6.cnf. It contains logging and network interface information.
Flags
| Item | Description |
|---|---|
| -f ConfigurationFileName | Specifies the configuration file to be used. Default is /etc/dhcpv6/dhcpc6.cnf. |
| -p ClientPort | Specifies the client port to be used. Default
is 546. |
| -t SolicitTimeout | Specifies the time until the client solicits configuration information from the server before exiting. |
| -u Client_duid_File | Specifies the client identifier file to be used. Default is /etc/dhcpv6/dhcpc6.duid. |
Exit Status
This command returns the following exit values:
| Item | Description |
|---|---|
| 0 | Successful completion. |
| >0 | An error occurred. |
Security
Access Control: You must have root authority to run this command.
Examples
- To start the DHCPv6 client with the configuration file dhcpcd6.cnf located
in /usr/local, type the following command:
startsrc -s dhcpcd6 -a "-f /usr/local/dhcpcd6.cnf"
Location
/usr/sbin/dhcpcd6
Files
| Item | Description |
|---|---|
| /usr/sbin/dhcpcd6 | Contains the dhcpcd6 client daemon. |
| /etc/dhcpv6/dhcpc6.cnf | Contains the default configuration file. |
| /etc/dhcpv6/dhcpc6.db | Contains the client lease file. This file is created by the client daemon and is not configurable. |
| /etc/dhcpv6/dhcpc6.duid | Contains the client identifier file. This file is created by the client daemon and is not configurable. |