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Configuration restrictions and guidelines
• If BPDU guard is disabled, a port set as an edge port will become a non-edge port again if it
receives a BPDU from another port. To restore the edge port, re-enable it.
• If a port directly connects to a user terminal, configure it as an edge port and enable BPDU
guard for it. This enables the port to transition to the forwarding state quickly while ensuring
network security.
• You cannot configure edge port settings and loop guard on a port at the same time.
Configuration procedure
To specify a port or a group of ports as edge port or ports:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view or port
group view.
• Enter Layer 2 Ethernet interface
view or Layer 2 aggregate interface
view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
Use one of the commands.
3. Configure the current ports
as edge ports.
stp
edged-port enable
All ports are non-edge
ports by default.
Configuring path costs of ports
Path cost is a parameter related to the rate of a port. On a spanning tree device, a port can have
different path costs in different MSTIs. Setting appropriate path costs allows VLAN traffic flows to be
forwarded along different physical links, achieving VLAN-based load balancing.
You can have the device automatically calculate the default path cost, or you can configure the path
cost for ports.
Specifying a standard for the device to use when it calculates
the default path cost
CAUTION:
If you change the standard that the device uses to calculate the default path costs, you restore the
path costs to the default.
You can specify a standard for the device to use in automatic calculation for the default path cost.
The device supports the following standards:
• dot1d-1998—The device calculates the default path cost for ports based on IEEE 802.1d-1998.
• dot1t—The device calculates the default path cost for ports based on IEEE 802.1t.
• legacy—The device calculates the default path cost for ports based on a private standard.
Table 13 sho
ws the mappings between the link speed and the path cost.
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