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-rw-r--r--doc/source/admin/config-mtu.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/source/admin/config-mtu.rst b/doc/source/admin/config-mtu.rst
index 4207809e46..78892c7563 100644
--- a/doc/source/admin/config-mtu.rst
+++ b/doc/source/admin/config-mtu.rst
@@ -130,6 +130,13 @@ IPv6. IPv6 uses RA via the L3 agent because the DHCP agent only supports
IPv4. Instances using IPv4 and IPv6 should obtain the same MTU value
regardless of method.
+.. note::
+
+ If you are using an MTU value on your network below 1280, please
+ read the warning listed in the
+ `IPv6 configuration guide <./config-ipv6.html#project-network-considerations>`__
+ before creating any subnets.
+
Networks with enabled vlan transparency
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~