sudo apt-get install isc-dhcp-server- set a static IPv6 address for the Interface I want to run the DHCPv6 server from that is part of the IPv6 network subnet outside the DHCP range.
 - Edit the /etc/dhcp/dhcpd6.conf file to configure the DHCPv6 range etc.
 - Create the /var/lib/dhcp/dhcpd6.leases
 - Manually start the DHCPv6 server.
 
sudo ifconfig eth0 inet6 add 2001:db8:0:1::128/64設定 dhcpd6.conf
default-lease-time 600;
max-lease-time 7200;
log-facility local7;
subnet6 2001:db8:0:1::/64
{
   #Range for clients
   range6 2001:db8:0:1::129 2001:db8:0:1::254;
}touch /var/lib/dhcp/dhcpd6.leaseschown dhcpd:dhcpd /var/lib/dhcp/dhcpd6.leasessudo dhcp -6 -f -cf /etc/dhcp/dhcpd6.conf eth0[via]