High availability, high performance control card supporting stacking with four 10GbE ports Allied Telesis SwitchBlade x8100 Series Layer 3+ chassis switches, with AT-SBx81CFC960 control cards, guarantee high performance for the large enterprise network core. Able to be used in 6 and 12 slot chassis, with the ability to stack two chassis into a single virtual unit, the CFC960-based system combines resilience and scalability in a superior solution