From ac490d7d99c264330a0e3f56d1b1066c41567b6f Mon Sep 17 00:00:00 2001 From: Jens Harbott Date: Wed, 31 Oct 2018 15:36:04 +0000 Subject: [PATCH] Update docs for disabling DNS server announcement The functionality allowing to disable DNS server announcement from the DHCP agent for certain subnets was introduced in [0]. We should mention this feature in the corresponding documentation. [0] https://review.openstack.org/495781 Change-Id: I4adfa7ba789a59f967297ebb6c571deb0652c7ca Related-Bug: 1311040 (cherry picked from commit 698e6d475cd12b7a8484c4e2eb1a44426780fef4) --- doc/source/admin/config-dns-res.rst | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/source/admin/config-dns-res.rst b/doc/source/admin/config-dns-res.rst index eedc61d430f..c7b5601a587 100644 --- a/doc/source/admin/config-dns-res.rst +++ b/doc/source/admin/config-dns-res.rst @@ -73,6 +73,10 @@ one DNS resolver, repeat the option multiple times. You can use this option in combination with the previous one in order to replace all existing DNS resolver addresses with new ones. +You can also set the DNS resolver address to ``0.0.0.0`` for IPv4 subnets, +or ``::`` for IPv6 subnets, which are special values that indicate to the +DHCP agent that it should not announce any DNS resolver at all on the subnet. + .. note:: When DNS resolvers are explicitly specified for a subnet this way, that setting will take precedence over the options presented in case 2.