In Layer 2 access designs, use uplink ports on different VSF stack members, one into each MC-LAG configured aggregation switch. This ensures efficient, fault-tolerant Layer 2 bandwidth up from the access layer. A Layer 2 access topology provides the following unique capabilities required in the data center: VLAN extension—The Layer 2 access topology provides the flexibility to extend VLANs between switches that are connected. These aggregation switches typically operate at Layer 2 or Layer 3 of the OSI model, depending on the network topology and configuration requirements. They support link aggregation protocols such as Link Aggregation Control Protocol(LACP) and Static Link Aggregation, which allow multiple physical. Use HPE Aruba Networking CX switches that support Virtual Switching Extension (VSX) redundancy to allow access switches and other devices to connect over a redundant, MC-LAG Layer 2 connection. VSX and the MC-LAG feature provide an easy way to add link redundancy to Layer 2 connections.
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