Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 145
53-1002269-02
Configuring STP related features
6
FIGURE 25 802.1W Draft 3 RSTP ready for failover
If the root port on a Switch becomes unavailable, 802.1W Draft 3 immediately fails over to the
alternate port, as shown in Figure 26.
Switch 1
Switch 2
Switch 4
Switch 3
Root Bridge
Bridge priority = 2
Bridge priority = 4
Root port = 2
Alternate = 3, 4
Bridge priority = 8
Root port = 4
Alternate = 3
Bridge priority = 6
Root port = 3
Alternate = 4
Port 2
FWD
Port 4
FWD
Port 3
FWD
Port 3
FWD
Port 4
BLK
Port 4
FWD
Port 3
BLK
Port 3
FWD
Port 4
FWD
Port 2
FWD
The arrow shows the path
to the root bridge