functions (IP Services) and IPv6 functions (Advanced IP Services) via optional software keys. With Cisco Catalyst Switch Modules 3110G and 3110X for BladeCenter, Cisco introduces a technology called the Virtual Blade Switch (VBS). This switch virtualization technology takes the individual physical switches within a rack of BladeCenter chassis and treats them as one logical switch. This innovation is the foundation of the switches′ ability to deliver increased performance and resilience while simplifying operations and management.