Replicating reservations necessary?

Steve 41 Reputation points
2022-08-24T22:27:31.73+00:00

We have two 2019 DHCP servers in loadbalance mode
I manually replicate a scope after creating a reservation.

BUT:

If I create a reservation on DHCP server A without manually replicating it, after some time I see the ipaddress/mac address on DHCP server B in "address Leases" as Reservation(infinite) instead of reservation(Active). Apparently this happens as soon as the affected device is online.
That IP address is no longer distributed to other devices.

If the device connects to DHCP server 2, it will get the same ip address as it is listed as Reservation(infinite) in the "address leases" folder

Questions:

  1. Is replicating reservations necessary?
  2. Is replication from Server A to Server B and vice versa?

Reagrds

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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Accepted answer
  1. Karlie Weng 13,876 Reputation points Microsoft Vendor
    2022-08-26T07:03:30.513+00:00

    Hi @Steve

    Two DHCP servers in a failover relationship synchronize the IP address lease information on a continual basis there by keeping their respective databases up-to-date with client information and in sync with each other.

    As I understand, EVEN not manually replicate RESERVATION, the address leases folder is synced with each other. If server A goes down, printer still get the same IP from B, I think no need to manually configure reserve.

    If the scope lease time is set to an infinite lease time, the reserved client's lease is also shown as infinite.

    Best regards
    Karlie

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  1. Steve 41 Reputation points
    2022-08-25T20:03:31.207+00:00

    Having a lease expiration as Reservation(infinite) on DHCP server B, why is my statement not correct?
    What is the problem if i don't replicate?

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  2. Steve 41 Reputation points
    2022-08-29T18:10:24.043+00:00

    Thanks KarlieWeng
    That was the response i was looking for.

    Thanks

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