This bug was fixed in the package isc-dhcp - 4.2.4-7ubuntu12.7
--------------- isc-dhcp (4.2.4-7ubuntu12.7) trusty; urgency=medium
* Don't assume IPv6 prefix length of 64 (LP: #1609898). Pulled from debian commit c347ab8a43587164486ce1f104eedfd638594e59.
-- Dan Streetman <email address hidden> Thu, 04 Aug 2016 13:07:23 -0400
This bug was fixed in the package isc-dhcp - 4.2.4-7ubuntu12.7
---------------
isc-dhcp (4.2.4-7ubuntu12.7) trusty; urgency=medium
* Don't assume IPv6 prefix length of 64 (LP: #1609898). 4486ce1f104eedf d638594e59.
Pulled from debian commit c347ab8a4358716
-- Dan Streetman <email address hidden> Thu, 04 Aug 2016 13:07:23 -0400