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PowerConnect B-Series FCX Configuration Guide 253
53-1002266-01
Configuring STP related features
8
FIGURE 45 Beginning of topology change notice
Switch 2 then starts the TCN timer on the Designated ports and sends RST BPDUs that contain the
TCN as follows (Figure 46):
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
Bridge priority = 1000
Bridge priority = 200
Bridge priority = 60
Bridge priority = 900
Bridge priority = 400
Bridge priority = 300
Port2 Port2
Port2
Port2
Port3
Port3
Port3
Port3
Port3
Port3
Port4
Port4
Port4
Port4
Port5
Port 5
Port5
Port7 Port8
Indicates the active Layer 2 path
Indicates direction of TCN
Switch 1
Switch 2
Switch 5
Switch 3
Switch 4
Switch 6