As a packet transits the router, it takes the following path. This packet “ walk” brings together the packet-based processing and flow-based processing that the JUNOS software performs on the packet.
Figure 3 shows the path of a data packet as it traverses through the Services Router. Refer to Figure 1 to see how the flow module in Figure 3 fits in with the architecture of the software.
Figure 3: Data Packet Traversing the Flow Module on the Services Router
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