Includes dual power supplies, hot-swappable modules, link aggregation (LAG), and support for HSRP/VRRP. Modular chassis or stackable designs make it easy to scale as your network grows. It is the top tier of the classic Cisco three-tier hierarchical network model, designed to organize complex IT environments into manageable, scalable, and predictable layers. (For next-generation data center layouts, see our guide on Spine-Leaf Architecture vs. It must have high-speed PCIe and Ethernet links to switch ICs to swap packets requiring special handling and issue commands and must also integrate efficient, standard CPUs to host network operating systems or. Chassis-based Layer 2/3 switches are modular devices designed to offer high performance, scalability, and fault tolerance. These switches consist of a central chassis that houses various line cards, modules, power supplies, and fan trays. Supporting high-density 25/50 GE and 40/100 GE, along with 400 GE, for. This document provides reference architectures for configuring networks for small campuses, large campuses, small software-defined (SD) branches, medium SD-branches, and large SD-branches. 1X support, SNMP, CLI/Web GUI, and network access control. Large buffers handle bursty traffic.