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Lectures notes for 2010 - KTH

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Routing<br />

Control<br />

Plane<br />

Routing<br />

Table<br />

Access<br />

List<br />

Queuing<br />

Priority<br />

Accounting<br />

Data<br />

Data<br />

Plane<br />

Cache<br />

Packet<br />

Switching<br />

Tasks<br />

Security<br />

Tasks<br />

Queuing<br />

Tasks<br />

Accounting<br />

Tasks<br />

Figure 1: Basic steps in Routing<br />

The routing table tells us which output port to use based on the destination (and<br />

possibly the source) IP address. The data plane has to run at packet rates (i.e., in<br />

real-time). However, a router also per<strong>for</strong>ms a lot of other processing<br />

Maguire Routing 7: 3 of 70<br />

maguire@kth.se <strong>2010</strong>.03.21 Internetworking/Internetteknik

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