diff --git a/agent_based/inv_cisco_wlc_clients.py b/agent_based/inv_cisco_wlc_clients.py
index c208d2c39927b8b814d3911d9ffa84f458ce81b4..9151962b07e5e8a2d88f8d105d1426b92638760e 100644
--- a/agent_based/inv_cisco_wlc_clients.py
+++ b/agent_based/inv_cisco_wlc_clients.py
@@ -9,12 +9,13 @@
 #
 # writen by: Th.L thl-cmk[at]outlook[dot]com
 #
-# 2016-08-22 : removed index column
-# 2017-04-09 : added wato enable/disable, remove columns
-# 2018-09-04 : changes for CMK 1.5.x (inv_tree --> inv_tree_list)
-# 2020-03-15 : added support for CMK1.6x
-# 2021-07-12 : rewritten for CMK 2.0
-#
+# 2016-08-22: removed index column
+# 2017-04-09: added wato enable/disable, remove columns
+# 2018-09-04: changes for CMK 1.5.x (inv_tree --> inv_tree_list)
+# 2020-03-15: added support for CMK1.6x
+# 2021-07-12: rewritten for CMK 2.0
+# 2021-07-15: added support for Catalyst 9800 Controllers
+
 
 import re
 import time
@@ -30,6 +31,7 @@ from cmk.base.plugins.agent_based.agent_based_api.v1 import (
     SNMPTree,
     TableRow,
     contains,
+    any_of,
 )
 from cmk.base.plugins.agent_based.agent_based_api.v1.type_defs import (
     StringTable,
@@ -358,7 +360,10 @@ register.snmp_section(
             '45',  # cldcUserAuthType
         ]
     ),
-    detect=contains('.1.3.6.1.2.1.1.1.0', 'Cisco Controller'),  # sysDescr
+    detect=any_of(
+        contains('.1.3.6.1.2.1.1.1.0', 'Cisco Controller'),  # sysDescr
+        contains('.1.3.6.1.2.1.1.1.0', 'C9800 Software'),  # sysDescr
+    )
 )
 
 register.inventory_plugin(
diff --git a/inv_cisco_wlc_clients.mkp b/inv_cisco_wlc_clients.mkp
index bfdecb39e90cf9a12c7b9e01d0b8257a4c9b99c2..4a6431743b5c0f22f7bba15646768d318a3848aa 100644
Binary files a/inv_cisco_wlc_clients.mkp and b/inv_cisco_wlc_clients.mkp differ
diff --git a/packages/inv_cisco_wlc_clients b/packages/inv_cisco_wlc_clients
index 654f42d021e894600208a5419945df1c22bb6ca3..a8519f062390a5270449571d413e0ae3491fb382 100644
--- a/packages/inv_cisco_wlc_clients
+++ b/packages/inv_cisco_wlc_clients
@@ -4,7 +4,6 @@
                 'Via WATO you can:\n'
                 ' - can add/remove some fields\n'
                 '\n'
-                'Tested with Cisco WLC 5520/5505/2504.\n'
                 '\n'
                 '2020-03.15: added support for CMK1.6x\n'
                 '2021-07-12: rewritten for CMK 2.0\n',
@@ -15,7 +14,7 @@
  'name': 'inv_cisco_wlc_clients',
  'num_files': 3,
  'title': 'inventory of cisco WLC clients',
- 'version': '20210712.v0.3',
+ 'version': '20210715.v0.3a',
  'version.min_required': '2.0.0',
- 'version.packaged': '2021.04.10',
+ 'version.packaged': '2021.07.14',
  'version.usable_until': None}
\ No newline at end of file
diff --git a/web/plugins/views/inv_cisco_wlc_clients.py b/web/plugins/views/inv_cisco_wlc_clients.py
index 5123d51341688dff201663d6564d23b102241b0e..9386e64ce083c69a7533d71dc7136afe4dd34025 100644
--- a/web/plugins/views/inv_cisco_wlc_clients.py
+++ b/web/plugins/views/inv_cisco_wlc_clients.py
@@ -1,36 +1,41 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-import cmk.gui.utils
 from cmk.gui.plugins.views import (
     inventory_displayhints, )
 from cmk.gui.i18n import _
 from cmk.gui.plugins.views.inventory import declare_invtable_view
 
 inventory_displayhints.update({
-    '.networking.wlan.controller.clients:': {'title': _('WLC clients'),
-                                             'keyorder': [
-                                                 'index', 'username', 'uptime', 'ipaddress', 'apmacaddress', 'ssid',
-                                                 'channel', 'accessvlan', 'devicetype', 'protocol', 'status',
-                                             ],
-                                             'view': 'invwlcclients_of_host'},
+    '.networking.wlan.controller.clients:': {
+        'title': _('WLC clients'),
+        'keyorder': [
+            'index', 'username', 'uptime', 'ipaddress', 'apmacaddress', 'ssid',
+            'channel', 'accessvlan', 'devicetype', 'protocol', 'status',
+        ],
+        'view': 'invwlcclients_of_host'},
 
     '.networking.wlan.controller.clients:*.index': {'title': _('Index'), },
-    '.networking.wlan.controller.clients:*.macaddress': {'title': _('MAC Addresse'), },
+    '.networking.wlan.controller.clients:*.username': {'title': _('Username'), },
+    '.networking.wlan.controller.clients:*.uptime': {'title': _('Uptime'), },
+    '.networking.wlan.controller.clients:*.ipaddress': {'title': _('IP address'), },
+    '.networking.wlan.controller.clients:*.apmacaddress': {'title': _('AP MAC address'), },
+    '.networking.wlan.controller.clients:*.ssid': {'title': _('SSID'), },
+    '.networking.wlan.controller.clients:*.channel': {'title': _('Channel'), },
+    '.networking.wlan.controller.clients:*.accessvlan': {'title': _('Access VLAN'), },
+    '.networking.wlan.controller.clients:*.devicetype': {'title': _('Device type'), },
+    '.networking.wlan.controller.clients:*.protocol': {'title': _('Protocol'), },
     '.networking.wlan.controller.clients:*.status': {'title': _('Status'), },
+
+    '.networking.wlan.controller.clients:*.macaddress': {'title': _('MAC Addresse'), },
     '.networking.wlan.controller.clients:*.wlanprofilename': {'title': _('WLAN profile name'), },
     '.networking.wlan.controller.clients:*.wgbstatus': {'title': _('WGB status'), },
     '.networking.wlan.controller.clients:*.wgbmacaddress': {'title': _('WGB MAC address'), },
-    '.networking.wlan.controller.clients:*.protocol': {'title': _('Protocol'), },
     '.networking.wlan.controller.clients:*.associationmode': {'title': _('Association mode'), },
-    '.networking.wlan.controller.clients:*.apmacaddress': {'title': _('AP MAC address'), },
     '.networking.wlan.controller.clients:*.iftype': {'title': _('Interface type'), },
-    '.networking.wlan.controller.clients:*.ipaddress': {'title': _('IP address'), },
     '.networking.wlan.controller.clients:*.nacstate': {'title': _('NAC state'), },
     '.networking.wlan.controller.clients:*.quarantinevlan': {'title': _('Quarantine VLAN'), },
-    '.networking.wlan.controller.clients:*.accessvlan': {'title': _('Access VLAN'), },
     '.networking.wlan.controller.clients:*.logintime': {'title': _('Login time'), },
-    '.networking.wlan.controller.clients:*.uptime': {'title': _('Uptime'), },
     '.networking.wlan.controller.clients:*.powersavemode': {'title': _('Power save mode'), },
     '.networking.wlan.controller.clients:*.currenttxrateset': {'title': _('Current TX rate (MBit/s)'), },
     '.networking.wlan.controller.clients:*.datarateset': {'title': _('Data rate set'), },
@@ -42,15 +47,12 @@ inventory_displayhints.update({
     '.networking.wlan.controller.clients:*.redirecturl': {'title': _('Redirect URL'), },
     '.networking.wlan.controller.clients:*.aaaoverrideaclname': {'title': _('AAA overide ACL name'), },
     '.networking.wlan.controller.clients:*.aaaoverrideaclapplied': {'title': _('AAA overide ACL applied'), },
-    '.networking.wlan.controller.clients:*.username': {'title': _('Username'), },
-    '.networking.wlan.controller.clients:*.ssid': {'title': _('SSID'), },
     '.networking.wlan.controller.clients:*.securitytagid': {'title': _('Security tag ID'), },
     '.networking.wlan.controller.clients:*.typekts': {'title': _('NEC KTS SIP client'), },
     '.networking.wlan.controller.clients:*.ipv6aclname': {'title': _('IPv6 ACL name'), },
     '.networking.wlan.controller.clients:*.ipv6aclapplied': {'title': _('IPv6 ACL applied'), },
     '.networking.wlan.controller.clients:*.dataswitching': {'title': _('Data switching'), },
     '.networking.wlan.controller.clients:*.authentication': {'title': _('Authentication'), },
-    '.networking.wlan.controller.clients:*.channel': {'title': _('Channel'), },
     '.networking.wlan.controller.clients:*.authmode': {'title': _('Auth mode'), },
     '.networking.wlan.controller.clients:*.reasoncode': {'title': _('Reason code'), },
     '.networking.wlan.controller.clients:*.sessionid': {'title': _('Session ID'), },
@@ -59,7 +61,6 @@ inventory_displayhints.update({
     '.networking.wlan.controller.clients:*.mdnsadvcount': {'title': _('mDNS adv count'), },
     '.networking.wlan.controller.clients:*.policyname': {'title': _('Policy name'), },
     '.networking.wlan.controller.clients:*.aaarole': {'title': _('AAA role'), },
-    '.networking.wlan.controller.clients:*.devicetype': {'title': _('Device type'), },
     '.networking.wlan.controller.clients:*.userauthtype': {'title': _('User auth type'), },
 })
 
diff --git a/web/plugins/wato/inv_cisco_wlc_clients.py b/web/plugins/wato/inv_cisco_wlc_clients.py
index 7d25b08280cf18d0a8809d86f080ac806fecf92f..40a49f1bdd4c807d580c764a2bb0f9bfda68dffa 100644
--- a/web/plugins/wato/inv_cisco_wlc_clients.py
+++ b/web/plugins/wato/inv_cisco_wlc_clients.py
@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 #
 #
+
 from cmk.gui.i18n import _
 from cmk.gui.plugins.wato import (
     HostRulespec,
@@ -16,12 +17,23 @@ from cmk.gui.plugins.wato.inventory import (
     RulespecGroupInventory,
 )
 
-_removecolumns = [
+_removecolumns_cisco_wlc_clients = [
+    # 'index': {'title', 'Index'),
+    # 'username': {'title', 'Username'),
+    # 'uptime': {'title', 'Uptime'),
+    # 'ipaddress': {'title', 'IP address'),
+    # 'apmacaddress': {'title', 'AP MAC address'),
+    # 'ssid': {'title', 'SSID'),
+    # 'channel': {'title', 'Channel'),
+    # 'accessvlan': {'title', 'Access VLAN'),
+    # 'devicetype': {'title', 'Device type'),
+    # 'protocol': {'title', 'Protocol'),
+    # 'status': {'title', 'Status'),
+
     ('ieee80211ucapable', '802.11u capable'),
     ('aaaoverrideaclapplied', 'AAA overide ACL applied'),
     ('aaaoverrideaclname', 'AAA overide ACL name'),
     ('aaarole', 'AAA role'),
-    ('accessvlan', 'Access VLAN'),
     ('aclapplied', 'ACL applied'),
     ('aclname', 'ACL name'),
     ('aproammacaddress', 'AP roam MAC address'),
@@ -67,9 +79,8 @@ def _valuespec_inv_cisco_wlc_clients():
              ListChoice(
                  title=_('list of columns to remove'),
                  help=_('information to remove from inventory'),
-                 choices=_removecolumns,
-                 default_value=[
-                 ],
+                 choices=_removecolumns_cisco_wlc_clients,
+                 default_value=[],
              )),
         ],
     )
@@ -79,6 +90,6 @@ rulespec_registry.register(
     HostRulespec(
         group=RulespecGroupInventory,
         match_type='dict',
-        name='inv_cisco_wlc_clients',
+        name='inv_parameters:inv_cisco_wlc_clients',
         valuespec=_valuespec_inv_cisco_wlc_clients,
     ))