Cisco Catalyst 3560-X Series, Software Configuration Manual

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring Optional Spanning-Tree Features
Displaying the Spanning-Tree Status
To globally disable loop guard, use the no spanning-tree loopguard default global configuration
command. You can override the setting of the no spanning-tree loopguard default global configuration
command by using the spanning-tree guard loop interface configuration command.
Displaying the Spanning-Tree Status
To display the spanning-tree status, use one or more of the privileged EXEC commands in Table 1-2 :
You can clear spanning-tree counters by using the clear spanning-tree [ interface interface-id ]
privileged EXEC command.
For information about other keywords for the show spanning-tree privileged EXEC command, see the
command reference for this release.
Step 3
spanning-tree loopguard default Enable loop guard.
By default, loop guard is disabled.
Step 4 end Return to privileged EXEC mode.
Step 5 show running-config Verify your entries.
Step 6
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Table 1-2 Commands for Displaying the Spanning-Tree Status
Command Purpose
show spanning-tree active Displays spanning-tree information on active interfaces only.
show spanning-tree detail Displays a detailed summary of interface information.
show spanning-tree interface interface-id Displays spanning-tree information for the specified interface.
show spanning-tree mst interface interface-id Displays MST information for the specified interface.
show spanning-tree summary [ totals ] Displays a summary of interface states or displays the total lines of the
spanning-tree state section.