Does a SFM-capable module require a DFC daughter card to use the switch fabric?
A DFC allows a module to support dCEF. The dCEF is the ability for a module to make routing decisions independent of the Supervisor Engine or MSFC2. Similar to the Cisco 7500 Versatile Interface Processor (VIP), the DFC works by replicating Layer 2 (L2) and Layer 3 (L3) forwarding logic from the Supervisor Engine and MSFC2, thereby allowing the module to make a L2 or L3 forwarding decision locally on the module. The DFC is only supported in Cisco IOS Software. The DFC card is a further enhancement and, in combination with the SFM, can increase the data forwarding capacity to 210 Mpps.