diff --git a/nova/conf/ipv6.py b/nova/conf/ipv6.py
index 59bfb2762842..fa1d4abbd615 100644
--- a/nova/conf/ipv6.py
+++ b/nova/conf/ipv6.py
@@ -21,6 +21,11 @@ IPV6_OPTS = [
     cfg.StrOpt('ipv6_backend',
         default='rfc2462',
         choices=('rfc2462', 'account_identifier'),
+        deprecated_for_removal=True,
+        deprecated_since='16.0.0',
+        deprecated_reason="""
+nova-network is deprecated, as are any related configuration options.
+""",
         help="""
 Abstracts out IPv6 address generation to pluggable backends.
 
diff --git a/releasenotes/notes/deprecate-more-nova-network-opts-a9f87c79f7d26438.yaml b/releasenotes/notes/deprecate-more-nova-network-opts-a9f87c79f7d26438.yaml
new file mode 100644
index 000000000000..78c993608632
--- /dev/null
+++ b/releasenotes/notes/deprecate-more-nova-network-opts-a9f87c79f7d26438.yaml
@@ -0,0 +1,7 @@
+---
+deprecations:
+  - |
+    The following options, found in ``DEFAULT``, were only used for configuring
+    nova-network and are, like nova-network itself, now deprecated.
+
+    - ``ipv6_backend``