Specifying A Standard For The Device To Use When It Calculates The Default Path Cost - HP 5120 EI Series Lan Switching Configuration Manual

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- 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.
•
Table 13 shows the mappings between the link speed and the path cost.
Table 13 Mappings between the link speed and the path cost
Link speed
0
10 Mbps
100 Mbps
1000 Mbps
Port type
N/A
Single port
Aggregate interface
containing 2 Selected ports
Aggregate interface
containing 3 Selected ports
Aggregate interface
containing 4 Selected ports
Single port
Aggregate interface
containing 2 Selected ports
Aggregate interface
containing 3 Selected ports
Aggregate interface
containing 4 Selected ports
Single port
Aggregate interface
containing 2 Selected ports
Aggregate interface
containing 3 Selected ports
Aggregate interface
containing 4 Selected ports
Path cost
IEEE 802.1d-1998
65535
100
19
4
82
IEEE 802.1t Private standard
200,000,000 200,000
2,000,000 2000
1,000,000 1800
666,666 1600
500,000 1400
200,000 200
100,000 180
66,666 160
50,000 140
20,000 20
10,000 18
6666 16
5000 14