HP ProCurve 9304M Installation And Configuration Manual page 237

• Synced – Once the Designated port changes into a discarding state, it asserts a synced signal. Immediately,
Alternate ports and Backup ports are synced. The Root port monitors the synced signals from all the bridge
ports. Once all bridge ports asserts a synced signal, the Root port asserts its own synced signal (Figure 8.6).
Figure 8.6 Synced Stage
Routing Switch 300
Configuring Spanning Tree Protocol (STP) and Advanced STP Features
Port1
Designated port
Port1
Root port
Synced
Port2
Synced
Discarding
Port2
Indicates a signal
Routing Switch 100
Root Bridge
Routing Switch 200
Port3
Synced
Discarding
Port3
Routing Switch 400
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