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root@workstation:/home/myuser# cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=17.04
DISTRIB_CODENAME=zesty
DISTRIB_DESCRIPTION="Ubuntu Zesty Zapus (development branch)"


Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question mynetwork.lan IN DS: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question mynetwork.lan IN SOA: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question monitoring.mynetwork.lan IN DS: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question monitoring.mynetwork.lan IN SOA: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question monitoring.mynetwork.lan IN A: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question mynetwork.lan IN DS: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question mynetwork.lan IN SOA: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question monitoring.mynetwork.lan IN DS: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question monitoring.mynetwork.lan IN SOA: no-signature
Dec  4 17:32:28 workstation systemd-resolved[8115]: DNSSEC validation failed for question monitoring.mynetwork.lan IN A: no-signature


root@workstation:/home/myuser# systemd-resolve monitoring.mynetwork.lan
monitoring.mynetwork.lan: resolve call failed: DNSSEC validation failed: no-signature


root@workstation:/home/myuser# cat /etc/resolv.conf 
# This file is managed by systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients directly to
# all known DNS servers.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 192.168.2.134

root@workstation:/home/myuser# cat /etc/systemd/resolved.conf 
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See resolved.conf(5) for details

[Resolve]
DNS=192.168.2.134
#FallbackDNS=8.8.8.8 8.8.4.4 2001:4860:4860::8888 2001:4860:4860::8844
#Domains=
#LLMNR=yes
#DNSSEC=allow-downgrade
#Cache=yes
#DNSStubListener=udp

root@workstation:/home/myuser# ping monitoring.mynetwork.lan
ping: monitoring.mynetwork.lan: Name or service not known
root@workstation:/home/myuser# dig monitoring.mynetwork.lan

; <<>> DiG 9.10.3-P4-Ubuntu <<>> monitoring.mynetwork.lan
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50371
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;monitoring.mynetwork.lan.	IN	A

;; ANSWER SECTION:
monitoring.mynetwork.lan. 300	IN	A	192.168.2.132

;; AUTHORITY SECTION:
mynetwork.lan.	300	IN	NS	dns01.mynetwork.lan.

;; ADDITIONAL SECTION:
dns01.mynetwork.lan.	300	IN	A	192.168.2.134

;; Query time: 0 msec
;; SERVER: 192.168.2.134#53(192.168.2.134)
;; WHEN: Sun Dec 04 17:48:48 CET 2016
;; MSG SIZE  rcvd: 107