Is it okay to reserve an IP outside DHCP scope on Server 2019?

MISAdmin 381 Reputation points
2021-08-13T14:57:49.93+00:00

I have DHCP running on Server 2019. I would like to reserve some IPs outside the scope range. For example, Scope range is 192.168.5.100 to 192.168.5.200. I want to reserve 192.168.5.70 thru .99 to certain devices. I tried it with my device and it is working. I'm just curious if it is okay to do this.

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A set of directory-based technologies included in Windows Server.
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Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.Network: A group of devices that communicate either wirelessly or via a physical connection.
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Windows DHCP
Windows DHCP
Windows: A family of Microsoft operating systems that run across personal computers, tablets, laptops, phones, internet of things devices, self-contained mixed reality headsets, large collaboration screens, and other devices.DHCP: Dynamic Host Configuration Protocol (DHCP). A communications protocol that lets network administrators manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's network.
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  1. MISAdmin 381 Reputation points
    2021-08-20T11:22:59.697+00:00

    I worked on this some more. The error occurs when I delete an existing reservation... before I add the new one. It doesn't matter which member of the failover I delete from. It happens at this time only. I didn't want to de-configure the scope and risk not being able to re-configure it. I'll probably leave it as is unless it gets worse or there is something else I can try.

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  1. Anonymous
    2021-08-13T15:18:27.887+00:00

    Should not be any problems with using addresses outside the range of your scope.

    --please don't forget to upvote and Accept as answer if the reply is helpful--

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  2. Anonymous
    2021-08-14T13:37:20.33+00:00

    Just checking if there's any progress or updates?

    --please don't forget to upvote and Accept as answer if the reply is helpful--

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  3. MISAdmin 381 Reputation points
    2021-08-15T11:59:46.983+00:00

    Hello. I started to reserve several other address but now I'm seeing many Event 20292 errors...

    A BINDING-ACK message with transaction id: 3174 was received for IP address: 192.168.5.75 with reject reason: (Outdated binding information ) from partner server: svr-02. domain. local for failover relationship: svr-02. domain. local-svr-01. domain .local.

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  4. Anonymous
    2021-08-15T13:42:51.61+00:00

    Something here may help with that.
    https://www.pickysysadmin.ca/2019/01/29/event-id-20292-from-dhcp-server/

    --please don't forget to upvote and Accept as answer if the reply is helpful--

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