Enable loop protection on each layer 2 interface (port, LAG, VLAN, or VXLAN) for which loop protection is needed, with the commands loop-protect and loop-protect vlan. This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol. Loop protection increases the efficiency of STP, RSTP, and MSTP by preventing ports from moving into a forwarding state that would result in a loop opening up in the network. Spanning-tree protocol loop protection enhances the normal checks that spanning-tree protocols perform on interfaces. Loop. Below you will find brief information for Ethernet switch S2700 V100R006C00. The S2700 V100R006C00 is a high-performance Ethernet switch that provides a range of features to meet the needs of modern networks. The default action is tx-disable, which. In order to be able to detect loops in the Layer 2 network in time and avoid serious impact on the entire network, it is necessary to provide a detection technology so that when a loop occurs in the network, the user can be notified in time to check the network connection and configuration, and the. Looking for some advice on what would be the best approach to prevent physical loops at the access layer.