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236 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuring STP related features
8
FIGURE 30 Sync stage
• 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 31).
BigIron
Switch 100
Root Bridge
Port1
Designated port
Port1
Root port
Sync
Switch 200
Switch 300 Switch 400
Port2
Sync
Discarding
Port3
Sync
Discarding
Port2
Port3
Indicates a signal