Dell POWEREDGE M1000E - Manual (Page 749)

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Cisco Catalyst Blade Switch 3120 for HP Command Reference
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Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
spanning-tree loopguard default
Related Commands Command Description
show running-config Displays the operating configuration. For syntax information, use this
link to the Cisco IOS Release 12.2 Command Reference listing page:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/prod_co
mmand_reference_list.html
Select the Cisco IOS Commands Master List, Release 12.2 to
navigate to the command.
spanning-tree guard loop Enables the loop guard feature on all the VLANs associated with the
specified interface.