[#4142] Update ARM

modified:   doc/sphinx/arm/dhcp4-srv.rst
modified:   doc/sphinx/arm/dhcp6-srv.rst

diff --git a/doc/sphinx/arm/dhcp4-srv.rst b/doc/sphinx/arm/dhcp4-srv.rst
index a5ae4f0b6c470b3fd28f646b79de5420e4a03bef..6a9a3d860429dff8d7222368c65de239b1d79c7f 100644 (file)
--- a/doc/sphinx/arm/dhcp4-srv.rst
+++ b/doc/sphinx/arm/dhcp4-srv.rst
@@ -4180,6 +4180,14 @@ qualifying suffix (if one is defined and needed).
    or to fine-tune various DNS update aspects. Please refer to the :ref:`hooks-ddns-tuning`
    documentation for the configuration options.
 
+.. note::
+
+    Beginning with Kea 3.1.3, when sanitizing results in an empty string, the
+    option (hostname or FQDN) will be ignored as if the client had not sent it.
+    This can happen if the value sent by the client contains only characters
+    that are deemed invalid by the expression in 'hostname-char-set' and
+    'hostname-char-replacement' is empty, "".
+
 .. _dhcp4-next-server:
 
 Next Server (``siaddr``)

diff --git a/doc/sphinx/arm/dhcp6-srv.rst b/doc/sphinx/arm/dhcp6-srv.rst
index cf41f563044abbba62f6179b7a198d37483b430e..7961e6f24a196515b0d7dabd0751da938f15c1ec 100644 (file)
--- a/doc/sphinx/arm/dhcp6-srv.rst
+++ b/doc/sphinx/arm/dhcp6-srv.rst
@@ -3857,6 +3857,14 @@ qualifying suffix (if one is defined and needed).
    or to fine-tune various DNS update aspects. Please refer to the :ref:`hooks-ddns-tuning`
    documentation for the configuration options.
 
+.. note::
+
+    Beginning with Kea 3.1.3, when sanitizing results in an empty string, the
+    FQDN option will be ignored as if the client had not sent it.  This can
+    happen if the value sent by the client contains only characters that are
+    deemed invalid by the expression in 'hostname-char-set' and
+    'hostname-char-replacement' is empty, "".
+
 .. _dhcp6-dhcp4o6-config:
 
 DHCPv4-over-DHCPv6: DHCPv6 Side