
FIGURE 43 Proposing and proposed stage
• 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 44 ). 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.
Spanning Tree Protocol
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