Switching Fabric

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What's Inside a Router
What's Inside a Router

Now that we've seen an overview of the functions and services of the network layer, let's turn our attention to the network layer's forwarding function - the actual transfer of packets from a router's incoming links to the appropriate outgoing links. We already took a brief look at a few

Tags network layer, line card, router, switching fabric, forwarding table, line speed
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Switching Fabric
Switching Fabric

The switching fabric is at the very heart of a router. It is through the switching fabric that the packets are in fact switched (that is, forwarded) from an input port to an output port. Switching can be completed in a number of ways, as shown in Figure 1:

Tags switching fabric, router, interconnection network, switch architecture
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