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[Chris NIVARD <1818641@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

How to reproduce:
=================
On AWS EC2:
- launch a CentOS 7.6 instance with IPv4 only
- once running: assign an IPv6 from AWS EC2, and reboot the instance
- while the instance data is properly populated: the network configuration does not assign the IPv6 to the instance (no connection).


Unsuccessful turnaround attempts:
=================================
A) /etc/cloud/cloud.cfg.d/99-ipv6-networking.cfg
network:
        version: 1
        config:
        - type: physical
                name: eth0
                subnets:
                - type: dhcp6

B) There has been a debate in the CentOS github as to whether AWS was IPv6 RFC compliant, read the entire thread here:
https://github.com/coreos/bugs/issues/1828
A solution provided there for Ubuntu cannot be applied on CentOS.

** Affects: cloud-init
     Importance: Undecided
         Status: New


** Tags: aws ec2 ipv6

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https://bugs.launchpad.net/bugs/1818641

Title:
  IPv6 not enabling on EC2 when done afterwards (CentOS 7.6)

Status in cloud-init:
  New

Bug description:
  How to reproduce:
  =================
  On AWS EC2:
  - launch a CentOS 7.6 instance with IPv4 only
  - once running: assign an IPv6 from AWS EC2, and reboot the instance
  - while the instance data is properly populated: the network configuration does not assign the IPv6 to the instance (no connection).

  
  Unsuccessful turnaround attempts:
  =================================
  A) /etc/cloud/cloud.cfg.d/99-ipv6-networking.cfg
  network:
          version: 1
          config:
          - type: physical
                  name: eth0
                  subnets:
                  - type: dhcp6

  B) There has been a debate in the CentOS github as to whether AWS was IPv6 RFC compliant, read the entire thread here:
  https://github.com/coreos/bugs/issues/1828
  A solution provided there for Ubuntu cannot be applied on CentOS.

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