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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 9 Configuring Spanning-Tree PortFast, UplinkFast, BackboneFast, and Loop Guard
Configuring Loop Guard on the Switch
This example shows how to enable loop guard:
Console> (enable) set spantree guard loop 5/1
Rootguard is enabled on port 5/1, enabling loopguard will disable rootguard on this port.
Do you want to continue (y/n) [n]? y
Loopguard on port 5/1 is enabled.
Console> (enable)
Disabling Loop Guard
To disable loop guard on the switch, perform this task in privileged mode:
This example shows how to disable loop guard:
Console> (enable) set spantree guard none 5/1
Rootguard is disabled on port 5/1, disabling loopguard will disable rootguard on this
port.
Do you want to continue (y/n) [n]? y
Loopguard on port 5/1 is disabled.
Console> (enable)
Task Command
Step 1
Disable loop guard on a port. set spantree guard none mod/port
Step 2
Verify that loop guard is disabled. show spantree guard {mod/port | vlan} mistp-instance
instance
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