Configuring Path Costs Of Ports - HP A5120 EI Series Configuration Manual

To do...
Enter interface
view or port
group view
Configure the current ports as edge ports
NOTE:

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.

Among loop guard, root guard and edge port settings, only one function (whichever is configured the earliest)
can at a time take effect on a port.

Configuring path costs of ports

Path cost is a parameter related to the rate of a port. On an MSTP-enabled 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.
Make the following configurations on the leaf nodes only.
Specifying a standard that the device uses when it calculates the default path cost
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- 1 998.

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.

Follow these steps to specify a standard for the device to use when it calculates the default path cost:
To do...
Enter system view
Specify a standard for the device
to use when it calculates the
default path costs of its ports
CAUTION:
If you change the standard that the device uses to calculate the default path costs, you restore the path
costs to the default.
Enter Ethernet interface
view or Layer 2 aggregate
interface view
Enter port group view
Use the command...
system-view
stp pathcost-standard { dot1d-
1998 | dot1t | legacy }
Use the command...
interface interface-type
interface-number
port-group manual port-
group-name
stp edged-port enable
Remarks
—
Optional
By default, the device calculates
the default path cost for ports
based on a private standard.
75
Remarks
Required
Use either command.
Required
All ports are non-edge ports
by default.