@@ -241,6 +241,43 @@ To resolve this:

 After making those changes, run `sudo systemctl daemon-reload`, and `sudo

 systemctl restart docker` to reload changes and (re)start the docker daemon.

+**NOTE**: Docker 1.12.5 will correctly validate that either an IPv6 subnet is provided or

+that the IPAM driver can provide one when you specify the `--ipv6` option.

+

+If you are currently using the `--ipv6` option _without_ specifying the

+`--fixed-cidr-v6` option, the Docker daemon will refuse to start with the

+following message:

+

+```none

+Error starting daemon: Error initializing network controller: Error creating

+                       default "bridge" network: failed to parse pool request

+                       for address space "LocalDefault" pool " subpool ":

+                       could not find an available, non-overlapping IPv6 address

+                       pool among the defaults to assign to the network

+```

+

+To resolve this error, either remove the `--ipv6` flag (to preserve the same

+behavior as in Docker 1.12.3 and earlier), or provide an IPv6 subnet as the

+value of the `--fixed-cidr-v6` flag.

+

+In a similar way, if you specify the `--ipv6` flag when creating a network

+with the default IPAM driver, without providing an IPv6 `--subnet`, network

+creation will fail with the following message:

+

+```none

+Error response from daemon: failed to parse pool request for address space

+                            "LocalDefault" pool "" subpool "": could not find an

+                            available, non-overlapping IPv6 address pool among

+                            the defaults to assign to the network

+```

+

+To resolve this, either remove the `--ipv6` flag (to preserve the same behavior

+as in Docker 1.12.3 and earlier), or provide an IPv6 subnet as the value of the

+`--subnet` flag.

+

+The network network creation will instead succeed if you use an external IPAM driver

+which supports automatic allocation of IPv6 subnets.

+

 ### Runtime

 - Fix race on sending stdin close event [#29424](https://github.com/docker/docker/pull/29424)

@@ -252,7 +289,6 @@ systemctl restart docker` to reload changes and (re)start the docker daemon.

 ### Contrib

 - Fix compilation on Darwin [#29370](https://github.com/docker/docker/pull/29370)

-- Use the selinux policy provided by docker-selinux on CentOS [#29377](https://github.com/docker/docker/pull/29377)

 ## 1.12.4 (2016-12-12)