The Cisco Catalyst 9400 Series switches are Cisco's leading modular enterprise switching access, distribution, and core platform built for security, IoT, and cloud. These switches form the foundational building block for SD-Access Cisco's lead enterprise architecture. The platform provides unparalleled investment protection with a chassis architecture that is capable of supporting up to 9 Tbps of system bandwidth and unmatched power delivery with high-density IEEE 802.3bt PoE (60W and 90W). Redundancy is now table stakes across the portfolio. The Catalyst 9400 delivers state-of-the-art High Availability (HA) with capabilities like Cisco StackWise Virtual technology with In-Service-Software-Upgrade (ISSU), SSO/NSF, uplink resiliency, N+1/N+N redundancy for power supplies. The platform is enterprise optimized with an innovative dual-serviceable fan tray design, side to side airflow, and is closet-friendly with ~16" depth. A single system can scale up to 384 access ports with your choice of 5G multigigabit copper, 1G copper, 1G fiber, Cisco UPOE+, Cisco UPOE, and PoE+ options and up to 192 ports of 10G Fiber and 10G multigigabit options. The availability of 1/10 G fiber ports facilitates aggregation of existing small form factor fixed access switches. The addition of the new SUP-1XL-Y supervisor allows unique investment protection through 25G uplink connectivity option which is becoming a popular alternative to 10 G in the core. The platform also supports advanced routing and infrastructure services, SD-Access capabilities, and network system virtualization. These features enable optional placement of the platform in the core and aggregation layers of small to medium-sized campus environments.