R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

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Link speed Port type
Path cost
IEEE
802.1d-1998
IEEE 802.1t Private standard
Aggregate interface
containing 2 Selected ports
10000 18
Aggregate interface
containing 3 Selected ports
6666 16
Aggregate interface
containing 4 Selected ports
5000 14
10 Gbps
Single port
2
2000 2
Aggregate interface
containing 2 Selected ports
1000 1
Aggregate interface
containing 3 Selected ports
666 1
Aggregate interface
containing 4 Selected ports
500 1
Configuration guidelines
When it calculates path cost for an aggregate interface, IEEE 802.1t takes into account the number of
Selected ports in its aggregation group, but IEEE 802.1d-1998 does not. The calculation formula of IEEE
802.1t is: Path cost = 200,000,000/link speed (in 100 kbps), where link speed is the sum of the link
speed values of the Selected ports in the aggregation group.
Configuration procedure
To specify a standard for the device to use when it calculates the default path cost:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Specify a standard for the
device to use when it
calculates the default path
costs of its ports.
stp pathcost-standard
{ dot1d-1998 | dot1t | legacy }
Optional.
The default standard used by the
device is legacy.
Configuring path costs of ports
When the path cost of a port changes, the system re-calculates the role of the port and initiates a state
transition.
To configure the path cost of ports:
Step Command Remarks
1. Enter system view.
system-view N/A