Configuration Guide User guide

1118 FastIron Configuration Guide
53-1002494-02
STP feature configuration
• 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 131).
FIGURE 131 Synced stage
BigIron
Switch 100
Root Bridge
Switch 200
Switch 300
Switch 400
Port1
Designated port
Port1
Root port
Synced
Port2
Port3
Indicates a signal
Port2
Synced
Discarding
Port3
Synced
Discarding