So we bought an ER7206 and we've come across a problem where RDP users on the same network are not able to maintain a connection. What I mean is the machines running the RDP client software and the machines that are running RDP to be connected to are both on the same network, same subnet. There is no NAT going on.

No issues with the past router but as soon as we installed the ER7206 there are random RDP disconnects for all users.

Here are things we have done to see if we can correct this issue:

- Restarted every device on the network

- Cleaned up networking with <netsh winsock reset> and <netsh int ip reset>

- Allocate Static IPs for each device instead of DHCP

- Force RDP to not use UDP and only TCP (Registry and Group Policy hack)

- Used the Remote Desktop Client from the Microsoft Store

- Reduced Graphics when connecting to 16bits

- Disabled Smart Card and Persistent Bitmap Caching

None of these helped. Not in any noticeable way. So the only thing we've got is that we had a router replaced and RDP keeps disconnecting.

We found an error code buried in the logs: 3489660929

Researching this error keeps pointing to a networking issue. We've done all the recommended fixes we could find. Is there any known issues for maintaining consistent connections with this router? Are there any suggestions on what we can try next?

Here is the dreaded error on the client side:

Thanks for any help!