Loop prevention is enabled on the root port or alternate port. An alternate port is a backup for a root port. 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, and Layer 2 protocol transparent. 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, and Layer 2 protocol transparent. Huawei, H3C and Ruijie: How to configure loop detection? Under what circumstances did the loop detection technology come into being? Loops in the network will cause the device to repeatedly send broadcast, multicast, and unknown unicast packets, resulting in a waste of network resources and even. A Layer 2 network loop is the silent killer of enterprise networks. Without a routing mechanism (Time-to-Live, TTL) to drop endlessly circulating frames, a single redundant link error can trigger a devastating broadcast storm, bringing down your entire infrastructure within seconds. For more information about Layer 2 loops: https://info. Provides Active/Active forwarding and eliminates Spanning Tree (STP) blocked ports. ECMP (Equal-Cost Multi-Path): A Layer 3 routing mechanism that load-balances.