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16.5. DHCP for IPv6 (DHCPv6)
The ISC DHCP includes support for IPv6 (DHCPv6) since the 4.x release with a DHCPv6 server, client and relay agent functionality. The server, client and relay agents support both IPv4 and IPv6. However, the client and the server can only manage one protocol at a time — for dual support they must be started separately for IPv4 and IPv6.
16.5.1. Configuring a DHCPv6 Server
The DHCPv6 server configuration file is installed together with the dhcp package and it can be found at
/etc/dhcp/dhcpd6.conf.
The sample server configuration file can be found at
/usr/share/doc/dhcp-<version>/dhcpd6.conf.sample, in Red Hat Enterprise Linux 6 at /usr/share/doc/dhcp-4.1.1/dhcpd6.conf.sample.
A simple DHCPv6 server configuration file can look like this:
subnet6 2001:db8:0:1::/64 {
range6 2001:db8:0:1::129 2001:db8:0:1::254;
option dhcp6.name-servers fec0:0:0:1::1;
option dhcp6.domain-search "domain.example";
}
For more examples, see the
dhcpd.conf(5) man page.
To start the DHCPv6 service, enter the command
service dhcpd6 start as root. To stop the DHCPv6 server, use the command service dhcpdv6 stop.
To pass command-line options to
dhcpd daemon when the DHCPv6 service starts, use the /etc/sysconfig/dhcpd6 file. This file uses the same structure like the /etc/sysconfig/dhcpd:
# cat /etc/sysconfig/dhcpd6
# Command line options here
DHCPDARGS=
The value added to the
DHCPDARGS option is passed to the DHCPv6 service, which passes it to the dhcpd daemon. For more information, see the STANDARD DHCPV6 OPTIONS section in the dhcpd-options(5) man page. For additional examples, see the Dynamic IPv6 configuration on the Fedora Project wiki.
