A central point, which can run on a dedicated SPU, or share the resources of one if there is only one SPU. A central point takes care of arbitration and allocation of resources, and it distributes sessions in an intelligent way. The central point assigns an SPU to be used for a particular session when the SPU processes the first packet of its flow.
http://www.juniper.net/techpubs/en_US/junos12.1×44/topics/concept/ipv6-flow-srx-series-architecture.html
A central point, which can run on a dedicated SPU, or share the resources of one if there is only one SPU. A central point takes care of arbitration and allocation of resources, and it distributes sessions in an intelligent way. The central point assigns an SPU to be used for a particular session when the SPU processes the first packet of its flow.
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