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    zaasmiZ
    @Jawad-Ahmad said in ubnt ap cp sync but link not working: If an Ubiquiti UniFi AP is syncing with the controller but the link isn’t working (no connection to the network), it usually indicates a problem with the physical connection or the AP’s network configuration. Troubleshooting steps include checking the physical link, verifying the AP’s IP address and subnet, and ensuring the controller can reach the AP. Troubleshooting Steps: Check the Physical Connection: Ethernet Cable: Ensure the ethernet cable connecting the AP to the network (or PoE adapter) is securely plugged in at both ends and not damaged. PoE: If using Power over Ethernet (PoE), verify the PoE injector or switch is providing power and that the cable connected to the AP is working. Link Light: Check for a link light on both the AP and the switch/injector port. If there is no link light, the issue is likely a bad cable, PoE injector, or a problem with the AP’s Ethernet port. Verify Network Configuration: IP Address: Ensure the AP is assigned an IP address within the correct subnet for your network. Subnet Mask: Verify the subnet mask is correct for the AP’s IP address. Gateway: Confirm the AP has the correct default gateway address (usually the router’s IP). Controller IP: Ensure the AP can reach the UniFi controller. If using layer 3 adoption, the controller IP may need to be configured on the AP or through a DNS record. Controller Connectivity: Adopt/Re-adopt: Try re-adopting the AP in the UniFi controller software. Reset AP: If re-adoption fails, consider resetting the AP to factory defaults (using the reset button) and then re-adopting it. Firewall and Antivirus: Temporarily Disable: If other troubleshooting steps fail, temporarily disable any firewalls (including Windows Firewall) or antivirus software that might be blocking communication between the AP and the controller. Topology Issues: STP Root: If you have a complex network with VLANs, check the spanning tree protocol (STP) root settings, as incorrect settings can cause connectivity issues. Topology Map: In the UniFi controller’s topology map, ensure the AP’s connection type is correctly identified (e.g., wired vs. wireless). If it’s showing a wireless connection when it should be wired, it might indicate a problem with the topology information. Firmware and Software: Controller Version: Ensure the UniFi controller software is up to date. AP Firmware: Ensure the AP’s firmware is also up to date. If you continue to have problems, provide more details about your network setup, including: What type of UniFi AP is it? What is the current IP address, subnet mask, and gateway of the AP? Is the AP connected directly to a UniFi switch, or is there a PoE injector involved? What is the topology of your network (e.g., are there VLANs)? Are you using layer 3 adoption? With more information, it will be easier to diagnose and resolve the specific issue.
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