Thanks Andreas, I will try to realize it in Checkmk.
In WhatsUp we can use the following information stored in variables.
We haven’t configured these attributes in Whatsup, they come definitely from SNMP configured devices
Device.Attribute.Contact=Systems Business Services
Device.Attribute.Description=Cisco IOS Software, C2960X Software (C2960X-UNIVERSALK9-M), Version 15.2(7)E2, RELEASE SOFTWARE (fc3) Technical Support: Support - Cisco Support and Downloads – Documentation, Tools, Cases - Cisco Copyright (c) 1986-2020 by Cisco Systems, Inc. Compiled Sat 14-Mar-20 16:53 by prod_rel_team
Device.Attribute.FwVersion=15.2(7)E2
Device.Attribute.HwVersion=B0
Device.Attribute.Location=Publications Bremen
Device.Attribute.MACAddress=6C:FA:89:xx:xx:xx
Device.Attribute.MACAddressVendor=Cisco Systems Inc.
Device.Attribute.Model=WS-C2960X-24TS-L
Device.Attribute.Name=SX4097P-2960X.domain.de
Device.Attribute.SerialNumber=FCW1817X16X
Device.Attribute.SwVersion=15.2(7)E2
Device.Attribute.Vendor=Cisco
Device.Attribute.Vendor_OS=
Device.Attribute.Vendor_OSVersion=