Dell PowerConnect B-RX Configuration Manual page 458

13
Convergence in a complex RSTP topology
FIGURE 59
Switch 2 then starts the TCN timer on the Designated ports and sends RST BPDUs that contain the
TCN as follows
•
•
•
382
Beginning of topology change notice
Switch 1
Bridge priority = 1000
Port2
Port3
Port2
Port3
Port4
Switch 3
Bridge priority = 300
Indicates the active Layer 2 path
Indicates direction of TCN
(Figure ):
Port5/Switch 2 sends the TCN to Port2/Switch 5
Port4/Switch 2 sends the TCN to Port4/Switch 6
Port2/Switch 2 sends the TCN to Port2/Switch 1
Switch 2
Bridge priority = 200
Port7 Port8
Port5
Port2
Port3
Port4
Port3
Port4
Switch 4
Bridge priority = 400
Switch 5
Bridge priority = 60
Port2
Port3
Port3
Port4
Port 5
Port5
Switch 6
Bridge priority = 900
BigIron RX Series Configuration Guide
53-1002253-01