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Catalyst 6500 Series Switch Command Reference—Release7.6
78-15328-01
Chapter2 Catalyst 6500 Series Switch and ROM Monitor Commands
clear spantree root
clear spantree root
To restore the spanning tree bridge priority, hello time, maxage, and forward delay on t he switch to their
default values, use the clear spantree root command.
clear spantree root [vlans]
clear spantree root mistp-instance instances
clear spantree root mst instances
Syntax Description
Defaults The defaults are as follows:
•switch priority is 32768
•forward delay is 15 seconds
•hello time is 2 seconds
•maxage is 20 seconds
Command Types Switch command.
Command Modes Privileged.
Examples This example shows how to clear the spanning tree root o n a range o f VLA Ns:
Console> (enable) clear spantree root 1-20
VLANs 1-20 bridge priority set to 32678.
VLANs 1-20 bridge hello time set to 2 seconds.
VLANs 1-20 bridge max aging time set to 20 seconds.
VLANs 1-20 bridge forward delay set to 15 seconds.
This example shows how to clear the spanning tree root on two specific VLANs:
Console> (enable) clear spantree root 22,24
VLANs 22,24 bridge priority set to 32678.
VLANs 22,24 bridge hello time set to 2 seconds.
VLANs 22,24 bridge max aging time set to 20 seconds.
VLANs 22,24 bridge forward delay set to 15 seconds.
Console> (enable)
vlans (Optional) Number of the VLAN; valid values are from 1 to 1000
and from 1025 to 4094.
mistp-instance
instances Specifies the instance number; valid values are from 1 to 16.
mst instances Specifies the MST instance number; valid values are 0 to 15.