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by hackmiester
1314 days ago
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I'm not sure what is non-programmable about the packet switching fabric. It can be programmed to switch packets, which is what we want the device to do. It can also be programmed to route packets, which is done at the same rate as switching them (usually line rate). So we can call this "layer 3 switching" because it is the same process as the L2 switching but it is happening at L3. That's what a L3 switch is and does. It can't do the same as a box with general purpose CPU, but it can do the thing you bought it for (routing) at line rate (hence the comparison to switching). |
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