Dell Force10 MXL Blade Configuration Manual page 408

Figure 23-3. 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. Because all bridges use the default
priority (until configured otherwise), the 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 is selected as the STP root.
Task
Assign a bridge priority.
Range: 0 to 61440
Default: 32768
406
| Per-VLAN Spanning Tree Plus (PVST+)
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
R3
3/22
Blocking
X X
3/12
STI 3 root
vlan 100 bridge-priority 4096
Command Mode
PROTOCOL PVST