Loop Protection works in conjunction with Spanning Tree to ensure that a loop-free network is present.
Loop Protection is enabled globally and at the interface level and monitors the presence of BPDUs on Loop Protection-enabled interfaces. When an interface enabled with loop-protection stops receiving BPDU’s from its designated port, the interface will not transition into the forwarding state. Typically, when an interface stops receiving BPDUs
from its directly connected neighbor, it will assume that there is no longer a switch on the other side of the link and will place the interface into forwarding mode.
Loop Protection-enabled interfaces transition to a loop-inconsistent state when they no longer receive BPDUs. If the interface recovers and begins to receive BPDUs, the interface will transition into a blocking state.
Loop protection should be enabled on all switch interfaces which have a possibility of becoming root or designated ports. When loop protection is enabled on an interface, an action and transmission mode can also be configured.
FLEX24-10G# configure terminal
FLEX24-10G(config)# loop-protect shutdown-time 300
FLEX24-10G(config)# loop-protect transmit-time 3
FLEX24-10G# copy running-config startup-config
% Saving 2132 bytes to flash:startup-config
Refer to the Admin Guide for all the advanced settings available in the switch. You’ll find additional resources like the Datasheet, Admin Guide, A&E spec sheet, etc on the product page here.
For more assistance,