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Outgoing
Switch Interface ASICs
The destination Switch Interface ASIC sends bandwidth
grants through the switch fabric to the originating Switch Interface
ASIC. The Queuing and Memory Interface ASIC forwards the notification,
including next-hop information, to the Switch Interface ASIC. The
Switch Interface ASIC sends read requests to the Queuing and Memory
Interface ASIC to read the data cells out of memory, and passes the
cells to the Layer 2 or Layer 3 Packet Processing ASIC.
The Layer 2 or Layer 3 Packet Processing ASIC reassembles
the data cells into packets, adds Layer 2 encapsulation, and
sends the packets to the outgoing PIC interface. The outgoing PIC
sends the packets out into the network.
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