STP Loop Guard causes the non-designated port to go into the STP loop inconsistent state instead of the forwarding state. In the loop-inconsistent state, the port prevents data traffic and BPDU transmission through the link, therefore avoiding the loop creation.

Enable loop protection on each layer 2 interface (port, LAG, or VLAN) for which loop protection is needed, with the commands loop-protect and loop-protect vlan. Define the action to be taken when a loop is detected with the command loop-protect action.

Enter the loop-protect command and specify the ports on which loop protection should be enabled. For example: Optionally specify receiver-action of send-disable to shut down the port …

Sets the action to be taken when a loop protection packet is received on a port. If an action is configured after a loop is detected, then the new action only takes effect after the re-enable timer expires. To have the action take effect immediately, disable and then re-enable loop protect.

STP loop guard is best applied on blocking or forwarding ports. The no form of the command sets the loop guard status to the default of disabled on the interface. Occasionally a hardware or software failure can cause MSTP to fail, creating forwarding loops that can cause network failures where unidirectional links are used.

When rebooting the switch or switchover, The loop-detected count on the loop detected port is reset to zero. Specifies the name of a logical interface on the switch. This can be one of the following: An Ethernet interface associated with a physical port. Format: member/slot/port. A LAG (link aggregation group). Specify the ID of LAG .

Loop protection. In cases where spanning tree protocols cannot be used to prevent loops at the edge of the network, loop protection may provide a suitable alternative.

Configures the time interval between successive loop protect packets sent on an interface. The no form of this command sets the time interval to the default value of 5 seconds. Configures the transmit interval in seconds. Range: 5 to 10. Default: 5.

Loop protect commands. Select a command from the left navigation menu /*]]>*/

Configures the time interval after which an interface disabled by loop protection is re-enabled. The loop protection timer is disabled by default. The no form of this command disables the loop protect timer. Specify the number of seconds after which a disabled interface is re …