Dell PowerConnect B-RX Configuration Manual page 447

FIGURE 50
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BigIron RX Series Configuration Guide
53-1002253-01
Sync and rerooted
Proposing
Switch 200
Port2
Sync
Rerooted
Discarding
Port2
Switch 300
Indicates an 802.1W signal controlled by the current Root port
Synced and Agree – When all the ports on the bridge assert their synced signals, the new Root
port asserts its own synced signal and sends an RST BPDU to Port4/Switch 60 that contains
an agreed flag (Figure 50). The Root port also moves into a forwarding state.
Switch 100
Designated
Port2
Root port
Port1
Port1
Designated port
Sync
Rerooted
Discarding
BigIron
Port4
Root port
Sync
Rerooted
Discarding
Port3
Sync
Rerooted
Discarding
Port3
State machines
Port2
port
Port4
Designated port
Switch 400
13
Switch 60
371