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schindler_m's avatar
schindler_m
Copper Contributor
Jul 09, 2024

No active Leases in Windows DHCP gui , but when check over Command Shell there are active Leases

Hello ,

We want to Monitor active Leases in DHCP with CheckMK.
It works so far .
We create an own Scope . In this Scope there are two IP Adresses .
When an Server becomes one of this both IP Adresses the we become an active Lease .
This Lease brings the Monitoring Software to an Alarm .
We setup an Leasetime for this Lease under the Scope Settings to 5 minutes.

The Target should be that the Monitoring Software brings an Alarm when one of this two Leases or both are aktive.
But we want to become back an green ( good ) Monitoring Message , when the Server who becomes the IP Address is shut down and the Lease Time from 5 Minutes are gone .
Means then there are no active Leases at all .

But now our Problem .
We shut down the Server and after 5 Minutes aktive leases under DHCP Server was empty .
BUT
When i put in this command : “netsh dhcp server show mibinfo” then i become back this info :

C:>netsh dhcp server show mibinfo

MIBCounts:
Discovers = 5167.
Offers = 5167.
Delayed Offers = 0.
Requests = 246250.
Acks = 246422.
Naks = 7.
Declines = 0.
Releases = 63.
ServerStartTime = Freitag, 5. Juli 2024 23:00:21
Scopes = 24.
Scopes with Delay configured= 0.
Subnet = x.x.x.x.
No. of Addresses in use = 1.
No. of free Addresses = 1.
No. of pending offers = 0.

Means the System think that there is already an active IP but the GUI dont show it .

How is it possible to bring back the No. of Addresses in use back to zero ?

Thanks
Michael

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