Solucion a tres errores cuando queremos arrancar ISC DHCP 4.3

Error 1: 
Can't open lease database /var/lib/dhcp/dhcpd6.leases: No such file or directory --
  check for failed database rewrite attempt!

Ejemplo:
root@IPv6-RTR:/etc#  /usr/sbin/dhcpd -6 -f -cf /etc/dhcp/dhcpd.conf eth5
Internet Systems Consortium DHCP Server 4.3.0a1
Copyright 2004-2013 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Can't open lease database /var/lib/dhcp/dhcpd6.leases: No such file or directory --
  check for failed database rewrite attempt!
Please read the dhcpd.leases manual page if you
don't know what to do about this.
root@IPv6-RTR:/etc# touch /var/lib/dhcp/dhcpd6.leases


Solucion a error 1:
#touch /var/lib/dhcp/dhcpd6.leases

Adicionalmente verificar si el usuario con el que se esta ejecutando dhcpd posee escritura en /var/lib/dhcp

Quizas tambien hay que:
#cd /var/lib/
#chown -R root.root dhcp

--------------------------

Error 2:
   No subnet6 declaration for eth5 (fe80::a00:27ff:fee7:b7c)

Ejemplo del error:
root@IPv6-RTR:/etc/dhcp# /usr/sbin/dhcpd -6 -f -cf /etc/dhcp/dhcpd.conf eth5
Internet Systems Consortium DHCP Server 4.3.0a1
Copyright 2004-2013 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Wrote 0 NA, 0 TA, 0 PD leases to lease file.

No subnet6 declaration for eth5 (fe80::a00:27ff:fee7:b7c).
** Ignoring requests on eth5.  If this is not what
   you want, please write a subnet6 declaration
   in your dhcpd.conf file for the network segment
   to which interface eth5 is attached. **


Not configured to listen on any interfaces!


Solucion a error 2:
   Quitar la declaracion de subnet6 en dhcpd6.conf y copiarla a dhcpd.conf

-------------------------

Error 3:
   Can't set SO_REUSEPORT option on dhcp socket: Protocol not available

Ejemplo del error:

root@IPv6-RTR:/etc/dhcp# /usr/sbin/dhcpd -6 -f -cf /etc/dhcp/dhcpd.conf eth5
Internet Systems Consortium DHCP Server 4.3.0a1
Copyright 2004-2013 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Wrote 0 NA, 0 TA, 0 PD leases to lease file.
Can't set SO_REUSEPORT option on dhcp socket: Protocol not available

Solucion a error 3:
 Actualizar el kernel a una version >= 3.9

SO_REUSEPORT es requerido por ISC DHCP 4.3 por ello es necesario tener un kernel > 3.9