Dell PowerConnect B-FCXs Configuration Manual page 308

8
Configuring STP related features
FIGURE 49
The arrow shows the path
to the root bridge
Root Bridge
Switch 1
Bridge priority = 2
Bridge priority = 6
Switch 3
Root port = 3/3
Alternate = 3/4
If the root port on a Switch becomes unavailable, 802.1W Draft 3 immediately fails over to the
alternate port, as shown in
266
802.1W Draft 3 RSTP ready for failover
Port1/2
FWD
Port1/4
FWD
Port1/3
FWD
Port3/3
FWD
Port3/4
BLK
Figure
Port2/2
FWD
Port2/4
FWD
Port4/4
FWD
50.
PowerConnect B-Series FCX Configuration Guide
Switch 2
Bridge priority = 4
Root port = 2/2
Alternate = 2/3, 2/4
Port2/3
FWD
Port4/3
BLK
Switch 4 Bridge priority = 8
Root port = 4/4
Alternate = 4/3
53-1002266-01