Cisco® Catalyst® 4500-X Series Switch (Figure 1) Is A Fixed Aggregation Switch That Delivers Best-in-class Scalability, Simplified Network Virtualization, And Integrated Network Services For Space-constrained Environments In Campus Networks. It Meets Business Growth Objectives With Unprecedented Scalability, Simplifies Network Virtualization With Support For One-to-many (Cisco Easy Virtual Networks [EVN]) And Many-to-one (Virtual Switching System [VSS]) Virtual Networks, And Enables Emerging Applications By Integrating Many Network Services.