OpenStack with IPv6 deployment failing with error "PXE-E16: No valid offer received"

Solution Verified - Updated -

Issue

You try to deploy your overcloud configured with dhcpv6-stateful and during the pxeboot, the nodes fail to get an IP address.
On screen you see the message "PXE-E16: No valid offer received".

Environment

  • Red Hat OpenStack Platform 16
  • Red Hat OpenStack Platform 17
  • ipv6_address_mode set to dhcpv6-stateful in your undercloud.conf

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