My topology maps shows a lot "RED" links. Above image shows an example.A link shows error is explained. Location 1 is connected to location 2 where link speed mismatch is shown by Topology map - link report.
Now actually when i login to these two devices, they are connected to each other but none of the port is on 10 Mbps. more over, it shows Gig port to Fa port & on the other device it shows port 22 (actually its port 20.)
I am attaching same image for reference