neutron/releasenotes/notes/bug-1311040-dhcp-no-dns-092...

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---
prelude: >
DNS server assignment can now be disabled in replies sent from the DHCP agent.
features:
- |
It is now possible to instruct the DHCP agent not to supply any DNS server
address to their clients by setting the ``dns_nameservers`` attribute for
the corresponding subnet to ``0.0.0.0`` or ``::``, for IPv4 or IPv6 subnets
(respectively).
upgrade:
- |
The functionality when a subnet has its DNS server set to ``0.0.0.0`` or
``::`` has been changed with this release. The old behaviour was that each
DHCP agent would supply only its own IP address as the DNS server to its
clients. The new behaviour is that the DHCP agent will not supply any DNS
server IP address at all.