PLANET WGSW-52040 - Manual (Page 341)

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19.1.22 spanning-tree cost-format
Command:
spanning-tree cost-format {dot1d | dot1t}
Function:
In global mode, users can select path-cost format with dot1d or dot1t, the default format is dot1t.
Command Mode:
Global mode.
Default:
count path-cost with dot1t format.
Usage Guide:
There are two formats about cost value: they are dot1d marked on IEEE802.1d-2008 and dot1t marked on
IEEE802.1t, but path-cost ranges of them are different, dot1d range from 1 to 65535, and dot1t range from 1 to
200,000,000.
If users already configured the cost value of link with spanning-tree cost command manually, changing path-cost
format with cost-format command is successful after the previous configuration is cleared only.
Example:
Set the cost format in global mode
Switch(config)#spanning-tree cost-format dot1d
19.1.23 spanning-tree mst loopguard
Command:
spanning-tree [mst <instance-id>] loopguard
no spanning-tree [mst <instance-id>] loopguard
Function:
Enable the loopguard function for specified instance, the no command disables this function.
Parameter:
<instance-id>: MSTP instance ID.