Dell Force10 Z9000 Configuration Manual page 712

Figure 34-3. Load Balancing with PVST+
STI 2 root
vlan 100 bridge-priority 4096
STI 1 root
vlan 100 bridge-priority 4096
The bridge with the bridge value for bridge priority is elected root. Since all bridges use the default priority
(until configured otherwise), lowest MAC address is used as a tie-breaker. Assign bridges a low
non-default value for bridge priority to increase the likelihood that it will be selected as the STP root.
Task
Assign a bridge priority.
Range: 0 to 61440
Default: 32768
Display the PVST+ forwarding topology by entering the command
from EXEC Privilege mode, as shown in
| Per-VLAN Spanning Tree Plus (PVST+)
712
STI 1: VLAN 100
R2
STI 2: VLAN 200 STI 2: VLAN 200
STI 3: VLAN 300
2/32
2/12
X X
1/22
X X
1/32
R1
Command Syntax
vlan bridge-priority
Figure
R3
3/22
Blocking
X X
3/12
show spanning-tree pvst
34-4.
STI 3 root
vlan 100 bridge-priority 4096
Command Mode
PROTOCOL PVST
vlan vlan-id
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