Up to four SFMs can be installed in the router, processing a total of 160 Mpps. The SFMs are hot-pluggable, as described in Field-Replaceable Units (FRUs). Removing or inserting an SFM causes a brief interruption in forwarding performance (about 500 ms) as the Packet Forwarding Engine reconfigures the distribution of packets across the remaining SFMs.
To replace an SFM, perform the following procedures: