Configuring Edge Ports; Configuration Restrictions And Guidelines; Configuration Procedure; Configuring Path Costs Of Ports - H3C S7500E-X Configuration Manual

Step
rate of the ports.

Configuring edge ports

If a port directly connects to a user terminal rather than another device or a shared LAN segment,
this port is regarded as an edge port. When network topology change occurs, an edge port will not
cause a temporary loop. Because a device does not determine whether a port is directly connected
to a terminal, you must manually configure the port as an edge port. After that, the port can rapidly
transit from the blocked state to the forwarding state.

Configuration restrictions and guidelines

•
If BPDU guard is disabled, a port set as an edge port becomes 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 quickly transit to the forwarding state when ensuring
network security.
•
On a port, the loop guard feature and the edge port setting are mutually exclusive.

Configuration procedure

To configure a port as an edge port:
Step
Enter system view.
1.
Enter Layer 2 Ethernet or
2.
aggregate interface view.
Configure the current ports
3.
as edge ports.

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.
Command
Command
system-view
interface interface-type
interface-number
stp edged-port
81
Remarks
Remarks
N/A
N/A
By default, all ports are
non-edge ports.