2026 01-January 21

Date: 2026 01-January 21

Stantec - OPH exploration

hi i need to change the nic ip on my computer to a static so that i can connect an ethernet cable to a zumlink radio so that i can run grassmarlin on it to see all connected devices

To set up a static IP for your NIC (Network Interface Card) to communicate with a ZumLink radio, you need to ensure your computer is on the same subnet as the radio's default management IP.

Most ZumLink radios ship with a default IP of 192.168.100.1. To talk to it, your computer should be set to something like 192.168.100.50.

How to Set a Static IP (Windows 10/11)

1. Press the Windows Key + R, type ncpa.cpl, and hit Enter. This opens your Network Connections.

2. Right-click your Ethernet adapter and select Properties.

3. Select Internet Protocol Version 4 (TCP/IPv4) and click Properties.

4. Select "Use the following IP address" and enter:

   • IP address: 192.168.100.50

   • Subnet mask: 255.255.255.0

   • Default gateway: (Leave blank, or use 192.168.100.1)

5. Click OK on both windows to save.

Connecting to the ZumLink

• Physical Connection: Connect your Ethernet cable directly from your PC to the ETH1 or Management port on the ZumLink.

• Verification: Open a Command Prompt and type ping 192.168.100.1. if you get a reply, you're connected.

• Web UI: Open a browser and navigate to https://192.168.100.1. The default credentials are usually admin / admin.

Running GrassMarlin

Once you have connectivity, GrassMarlin will be able to "see" the traffic passing through that interface.

1. Launch GrassMarlin as an Administrator.

2. Select the Interface: Choose the Ethernet NIC you just configured.

3. Passive Discovery: Because GrassMarlin is a passive tool, it listens for broadcast and multicast traffic. If the ZumLink is acting as a gateway or bridge for other devices, you should start seeing nodes populate in the logical view.

Note: If you aren't seeing traffic from devices behind the radio, ensure the ZumLink is configured to allow management/SNMP traffic or that you are capturing on a port that sees the relevant data flow.

Would you like me to help you troubleshoot if the radio is on a different default IP range?