I'm seeing the same behavior on my 12.04 and 14.04 systems.
I wanted to deploy a fairly large (50 servers) IPv6 only setup using SLAAC but I had to revert to static IPv6 configuration due to this issue with Ubuntu.
Configuring static mac addresses isn't something I want either, so for now I'm sticking with a static IPv6 configuration, but that's not something I want to keep.
this isn't specific to 14.0.4.
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I'm seeing the same behavior on my 12.04 and 14.04 systems.
I wanted to deploy a fairly large (50 servers) IPv6 only setup using SLAAC but I had to revert to static IPv6 configuration due to this issue with Ubuntu.
Configuring static mac addresses isn't something I want either, so for now I'm sticking with a static IPv6 configuration, but that's not something I want to keep.
Would like to see this resolved
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