Hello , we have an Monitoring Problem with APs.
All our APs becomes there IPs over DHCP with a Lease Time in Scope of 8 Days.
Yesterday we start a DNS Scavenging in our DNS Server . But for this first time we start the Scavenging with 1 Day . Means older than one Day Host Records will be deleted .
After this “Cleaning” Run in DNS , not all, but 50 APs shown in CheckMK as Critical.
This ist normal because this was the APs which was deleted in AD and therefore over Name not reachable .
How can i manage this behaviour in the Future or how can i reach that a check runs , that proof every 12 hours for example if the AP is again reachable because the DHCP add an new DNS Host Record in DNS Server for this Host.
This Morning i solve it to run an Bulk Service Discovery.
If the device is a real DHCP device then you need to create it with FQDN as IP address.
With this setup CMK checks the address entry every time it sent’s a query to the host.
Now i need a Solution which creates for me, for all of my Access Points in CheckMK Site, an IP Address with , in my Case the Hostname of the Access Point.
Is it possible over the Web GUI ?
Wouldn’t the rule “Hosts with dynamic DNS lookup” work as well? Than @Michael_BGL can just enable that rule for the folder where the APs are located (or use any other condition) instead of having to change each host and its address individually.
Yes this should also work - but i prefer the FQDN inside the IP field to see without any problem that this is a host using DHCP.
I think it is more a question what you prefer.