D-Link DGS-3224TG - Troubleshooting STP; Spanning Tree Protocol Failure

DGS-3224TG Gigabit Ethernet Switch User’s Guide
Troubleshooting STP
Spanning Tree Protocol Failure
A failure in the STA generally leads to a bridging loop. A bridging loop in an STP environment comes
from a port that should be in the blocking state, but is forwarding packets.
135