Server 2019 DHCP Statistics Wrong

Question

Server 2019 DHCP Statistics Wrong

Anonymous

I have 2 server 2019 Datacenter Server Core running DHCP in a hot failover configuration. Several of the scopes are showing a high number of leases in use int the scope statistics box.

In my case right now it is showing

Total Addresses = 490
In Use = 353 (72%)
Available = 137 (27%0
Addresses Available (This Server's pool) = 113
Addresses Available (Partner Pool) = 24 (4%)
Addresses granted (This Server's pool) = 353 (72%)
Addresses granted (Partner Pool) = 0

When I look at the address Leases for this pool there is only 35 Leases

My Confusion comes from why are the statistics so far off and will this affect the DHCP Servers ability to hand out these ip addresses?

I ran some powershell against the server

get-dhcpserverv4lease -ComputerName XXXXX -ScopeID xx.xx.xx.xx

This returns 35 leases

What am I missing here? Is there a bug in Server 2019?

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1 answer

Answer 1

Hello Robert WilkersonBT

Two possible explanations for this inconsistency could be:

When a lease duration expires, the DHCP server does not immediately reclaim the IP address. Instead, it enters a grace period during which the client can still renew the lease. These leases are also considered "in use" because they haven't been fully released or renewed yet. DHCP on Windows Servers – Why are the expired IP addresses not getting re-assigned? - TechNet Articles - United States (English) - TechNet Wiki (microsoft.com)
If DHCP lease scavenging is enabled, expired leases may not be immediately removed from the statistics until the scavenging process runs and cleans up the database.

Regards,

Karlie

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Server 2019 DHCP Statistics Wrong

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