DHCP Table

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Micke_MNO
Micke_MNO Posts: 4 image  Freshman Member
First Comment First Anniversary
in Security

Im looking for a simple or smart way to organize the units thats included in the DHCP Table.
As an eg, I would like to put the showned printers in a IP range, I can see them in the list but I cant edit theyres IP adresses to put them in a logic range and then give them static IP addresses.
I have seen that I can RESERVE those units but not change their IP's to the range I would like to put those units.

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  • Zyxel_Barry
    Zyxel_Barry Posts: 120 image  Zyxel Community Virtual Assistant
    5 Answers First Comment Friend Collector

    Hi @Micke_MNO,

    I understand you're looking for a way to organize devices in your DHCP table and assign specific IP addresses, particularly for printers, even if they are currently outside your desired IP range.

    Here's how you can manage IP addresses and reservations for your devices:

    • Reserve an existing IP address: You can easily reserve an existing DHCP IP address from the Web-GUI. Navigate to Network Status > DHCP Table > Current DHCP List, select the client you want to reserve, and click "Reserved." The device will then consistently receive this IP address.
    • Assign a static IP address to a client: You can set up static IP addresses for devices through the Nebula Control Center (NCC). Go to Site-wide > Clients > Client list, choose the category "Security router clients", select the client, and click "Policy" to select "Reserve IP".
    • Manually add a client with a reserved IP: If the device isn't currently listed, you can manually add a client and reserve an IP for it. When manually adding a client with a reserved IP, the system will check for conflicting IP or MAC addresses and alert you if any are detected. The system also verifies that the specified IP address belongs to an existing subnet.
    • Important considerations for static IPs: If you plan to assign static IP addresses directly on the devices themselves (e.g., on the printer), ensure these IPs are outside your DHCP range to prevent conflicts.

    To help me provide more specific guidance, please provide the following information:

    • Device Model: What is the specific model of your Zyxel security appliance?
    • Firmware Version: What firmware version is currently running on your device?
    • Network Topology: A brief description or diagram of your network setup, including how your printers are connected.
    • Nebula: If your device is managed by Nebula, please enable Zyxel Support Access via Help > Support Request in the Nebula console and provide your Organization and Site name. This will allow our support team to view your cloud environment configuration directly, which can significantly speed up troubleshooting.

    This AI response aims to provide initial troubleshooting steps and identify information needed for further diagnosis. Feel free to share additional details based on the suggestions above — this will help community members offer more targeted assistance.
    If you have feedback or idea about this AI assistant, share them in Community Feedback.

  • Micke_MNO
    Micke_MNO Posts: 4 image  Freshman Member
    First Comment First Anniversary

    Hi.
    Im using USG FLEX 200 for my Firewall, which I have recently installed (upgraded from USG 60) and registered but also run the upgrade features to find for all the services of my USG last week.
    Im running a small network which the plan is to expand to remote users network, where I believe I can use the VPN features when that day comes (Im waiting for a Internet upgrade when the speed today is very poor).
    Im not yet using the Nebula feature when Im still in the start up phase of my planned network, where Im looking at creating a structure to work from in this network.
    The reason to write here was to get a initial help to get started with the basics of this USG.
    I have had a brief look in to the manual for my USG where I miss a self explaining part of the fundamental basics for structuring a network, like arranging IP's and make printers available for all users but also easy to reach from different segments.

    For the moment is my demands of my USG fair and maybe it will stay there, the time will tell which.

  • Zyxel_Tina
    Zyxel_Tina Posts: 642 image  Zyxel Employee
    Zyxel Certified Network Administrator - Security Zyxel Certified Network Administrator - Switch 100 Answers 500 Comments

    Hi @Micke_MNO,

    To assign a desired static IP to your printer, you need to configure it from the Configuration menu, not from the DHCP Table view.

    Method 1 – Add a Static DHCP entry

    1. Go to Configuration > Network > Interface > Ethernet.
    2. Select the interface where the printer is connected and click Edit.
    3. Locate the DHCP Settings section.
    4. Add an entry in the Static DHCP Table with the printer’s MAC address and the IP you want.
    5. Apply the configuration.

    Method 2 – Edit an existing reservation

    If you already reserved the IP from the DHCP Table:

    1. Go to Configuration > Network > Interface > Ethernet and edit the interface where the printer is connected.
    2. In DHCP Settings, find the printer in the Static DHCP Table.
    3. Modify the IP address and apply.

    Please note that after applying the change, the printer will not automatically obtain the new IP until its old lease expires. To speed this up, you can reconnect the printer’s network cable or reboot the printer to force a DHCP renewal.

    These methods allow you to organize devices like printers into the IP range you prefer.

    Zyxel Tina

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