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Multiple Instance Spanning-Tree Operation
Loop Protection
Figure 3-35. Example of Changing Modes for Loop Protection
Operating Notes
■ The receiver-action option can be configured on a per-port basis and can
only be enabled after loop protection has been enabled on the port. All
other configuration options (disable-timer, trap loop-detected, and transmit
interval) are global.
■ The trap option refers to a SNMP trap.
■ Regardless of how the receiver-action and trap options are configured, all
detected loops will be logged in the switch’s event log.
■ The no loop-protect <port> command will not remove a receive-action
configuration line from the running configuration unless this option is set
to receive-action send-disable.
■ If loop-protect is enabled in port mode, it cannot also be enabled in VLAN
mode, and vice-versa.
Viewing Loop Protection Status
Displaying Loop Protection Status in Port Mode
To display information about ports with loop protection enabled, enter the
show loop-protect command.
Syntax: show loop-protect <port-list>
Displays the loop protection status for ports. If no ports are
specified, the information is displayed only for the ports that
have loop protection enabled.
HP Switch(config)# loop-protect mode port
Any Loop Protect enabled VLAN will be deleted. Do you want to
continue [Y/N]? n
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