Dell Force10 MXL Blade - Modify Interface PVST+ Parameters

Per-VLAN Spanning Tree Plus (PVST+) | 409
Figure 23-5. BPDU Filtering enabled globally
Modify Interface PVST+ Parameters
To increase or decrease the probability that a port becomes a forwarding port, you can adjust two interface
parameters:
• Port cost is a value that is based on the interface type. The greater the port cost, the less likely the port
is selected to be a forwarding port.
• Port priority influences the likelihood that a port is selected to be a forwarding port in case that
several ports have the same port cost.
Table 23-2 lists the default values for port cost by interface.
Task Command Syntax Command Mode
Enable BPDU Filter globally to filter transmission of BPDU port fast
enabled interfaces.
edge-port bpdu filter
default
PROTOCOL PVST
Table 23-2. PVST+ Default Port Cost Values
Port Cost Default Value
1000-Mb/s Ethernet interfaces 20000
10-Gigabit Ethernet interfaces 2000
40-Gigabit Ethernet interfaces 1400
Port Channel with one 10-Gigabit Ethernet interface 2000
Port Channel with one 40-Gigabit Ethernet interface 1400
Port Channel with two 10-Gigabit Ethernet interfaces 1800
Port Channel with two 40-Gigabit Ethernet interfaces 600