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Following the Data Path for a Unicast Session

JUNOS software for the SRX 3400 and SRX 3600 services gateways is a distributed parallel processing high throughput and high performance system. This section describes the process that the services gateway undertakes in establishing a session for packets belonging to a flow that transits the device.

To illustrate session establishment and the packet “walk” including the points at which services are applied to the packets of a flow, this example uses the simple case of a unicast session.

This packet “walk” brings together the packet-based processing and flow-based processing that the JUNOS software performs on the packet.

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