Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 115
53-1002269-02
Configuring STP related features
6
• Sync – Once the Root port is elected, it sets a sync signal on all the ports on the bridge. The
signal tells the ports to synchronize their roles and states (Figure 6). Ports that are non-edge
ports with a role of Designated port change into a discarding state. These ports have to
negotiate with their peer ports to establish their new roles and states.
FIGURE 6 Sync stage
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