Network Setup & Issue Summary

Original Setup (Working Fine)

• NTD → ER7212PC (PoE Router/Switch)

  • ER7212PC connected to a Netgear 24-port switch to distribute connectivity throughout the house.

  • Devices connected via PoE ports on ER7212PC:

    • 4 × PoE Cameras

    • 1 × PoE Doorbell

    • 2 × EAP225 Access Points

Everything was working well with minimal configuration.

Upgrade & Reconfiguration

I recently upgraded my internet plan through my ISP, moving from 1000 Mbps to 2000 Mbps, which required the NTD to be replaced.

To make full use of the increased speed, I changed the network configuration as follows:

New Setup

NTD

│

▼ ER7412-M2 (Primary Router)

├──> ER7212PC (still handling PoE devices: cameras, doorbell, EAP225s)

└──> Ubiquiti Pro Max 16 (for server, 2.5G devices, and overflow from ER7212PC)

Problem After Change

• Since the reconfiguration:

  • Wi-Fi performance dropped significantly.

  • Frequent dropouts during streaming on devices connected via EAP225 APs.

  • No issues on Ethernet-connected devices.

Troubleshooting Steps Taken

1. Rebooted all devices – no improvement.

2. Reverted to original setup (removed ER7412-M2) – issue persists.

3. Disconnected Ubiquiti Pro Max 16 – no change.

4. Factory reset the ER7212PC controller and both EAP225 Access Points:

   • Initially appeared to fix the problem.

   • After ~3 hours, APs disappeared from all device lists.

   • However, controller web interface shows both APs as connected and healthy.

Current Situation

• APs are no longer discoverable by devices, but still appear healthy in the controller UI.

• Ethernet works fine, indicating the issue is isolated to Wi-Fi via the APs.

• I'm unsure if I’ve missed a configuration step or introduced a conflicting setting.

Request for Help

I’m still learning and haven’t made many custom configurations, so I’m hoping someone can point out:

• Any common settings or misconfigurations that could cause this behavior.

• If the change in topology (introducing ER7412-M2 and Ubiquiti switch) could have affected the APs.

• Whether this sounds like a controller issue, a VLAN/routing/DHCP problem, or something else entirely