HP E4510-48G, Command Reference Manual

Page: 139 / 1334

4-27
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Configured in Ethernet interface view, the setting takes effect on the current interface only;
configured in port group view, the setting takes effect on all member ports in the port group.
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Configured in Layer 2 aggregate interface view, the setting takes effect only on the aggregate
interface; configured on a member port in an aggregation group, the setting can take effect only
after the port leaves the aggregation group.
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This feature takes effect only after you enable it on the root port.
Examples
# Enable No Agreement Check on GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] stp no-agreement-check
stp pathcost-standard
Syntax
stp pathcost - standard { dot1d-1998 | dot1t | legacy }
undo stp pathcost-standard
View
System view
Default Level
2: System level
Parameters
dot1d-1998 : The device calculates the default path cost for ports based on IEEE 802.1d-1998.
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.
Description
Use the stp pathcost-standard command to specify a standard for the device to use when calculating
the default path costs for ports of the device.
Use the undo stp pathcost-standard command to restore the system default.
By default, the device calculates the default path cost for ports based on a private standard.
Note that:
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If you change the standard that the device uses in calculating the default path cost, the port path
cost value set through the stp cost command will be invalid.
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Table 4-10 shows the path costs calculated using different standards at different link speed. When
calculating path cost for an aggregate interface, 802.1d-1998 does not take into account the
number of member ports in its aggregation group as 802.1t does. The calculation formula of
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 non-blocked ports in the aggregation group.