A Layer 3 switch does everything an L2 switch does, plus routing — moving traffic between networks (VLANs/subnets) using IP addresses, in hardware, at wire speed. This is what you put at the core or aggregation layer to connect all your VLANs and buildings together quickly. In practice, Layer 2 switches fit access-layer endpoint connectivity, while Layer 3 switches are better for inter-VLAN routing. In the complex network architecture of the industrial internet, Layer 2 and Layer 3 managed switches act as two parallel "expressways," respectively handling the rapid data transmission at the data link layer and intelligent routing at the network layer. Their core differences lie not only in. This guide explains the differences between Layer 2 (L2) and Layer 3 (L3) switches, offers actionable deployment advice, and provides a framework for selecting the right hardware for your network. Layer 2 and Layer 3 switches operate at different layers of the OSI model and serve distinct purposes. How Immunity fits A layered network in practice When an L2-only network is enough Why hardware routing beats a router here Resilience at the core Choosing L2 and L3 for your network Stacking and the access layer Multicast, QoS and other L3 work Migrating from a flat network Managing L2 and L3. A Layer-2 switch works at the Data Link layer or Layer 2 of the OSI reference model. Learn more with this free online training course on the Meraki Learning Hub: Sign in with your Cisco SSO or create a free account to start training. Traditional switching operates at.
