R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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To do... Use the command... Remarks
Specify a standard for
the device to use when
calculating the default
path costs of its ports
stp pathcost-standard { dot1d-1998 |
dot1t | legacy }
Optional
legacy by default.
CAUTION:
If you change the standard that the device uses in calculating the default path costs, you restore the path
costs to the default.
NOTE:
W
hen calculatin
g
path cost for an a
gg
re
g
ate 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.
Link speed Port type
Path cost
IEEE
802.1d-1998
IEEE 802.1t Private standard
0 — 65535 200,000,000 200,000
10 Mbps
Single port
100
2,000,000 2000
Aggregate
interface
containing 2
Selected ports
1,000,000 1800
Aggregate
interface
containing 3
Selected ports
666,666 1600
Aggregate
interface
containing 4
Selected ports
500,000 1400
100 Mbps
Single port
19
200,000 200
Aggregate
interface
containing 2
Selected ports
100,000 180
Aggregate
interface
containing 3
Selected ports
66,666 160
Aggregate
interface
containing 4
Selected ports
50,000 140