In addition to supporting the general features listed above, the switch fabric-enabled modules also support different features. Fabric-enabled, 24-port 100FX modules (WS-X6524-100FX-MM) are field-upgradable to support Distributed Cisco Express Forwarding (dCEF) for maximum scalability. They feature connection to the bus as well as to the switch fabric for maximum resiliency. You get the superior traffic management with very large per-interface buffers and multiple priority queues, including a strict priority queue in each direction.