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diff --git a/docs/vTC/README.rst b/docs/vTC/README.rst new file mode 100644 index 000000000..018573541 --- /dev/null +++ b/docs/vTC/README.rst @@ -0,0 +1,96 @@ +========= +Yardstick +========= + +Overview of the virtual Traffic Classifier +======== +The virtual Traffic Classifier VNF [1], comprises in the current version of +1 VNFC [2]. The VNFC contains both the Traffic Inspection module, and the +Traffic forwarding module, needed to run the VNF. The exploitation of DPI +methods for traffic classification is built around two basic assumptions: +(i) third parties unaffiliated with either source or recipient are able to +inspect each IP packet’s payload and +(ii) the classifier knows the relevant syntax of each application’s packet +payloads (protocol signatures, data patterns, etc.). +The proposed DPI based approach will only use an indicative, small number of the +initial packets from each flow in order to identify the content and not inspect +each packet. +In this respect it follows the Packet Based per Flow State (PBFS). +This method uses a table to track each session based on the 5-tuples +(src address,dest address,src port,dest port,transport protocol) +that is maintained for each flow. + +Concepts +======== +Traffic Inspection: The process of packet analysis and application +identification of network traffic that passes through the vTC. + +Traffic Forwarding: The process of packet forwarding from an incoming +network interface to a pre-defined outgoing network interface. + +Traffic Rule Application: The process of packet tagging, based on a +predefined set of rules. Packet tagging may include e.g. ToS field modification. + +Architecture +============ + +The Traffic Inspection module is the most computationally intensive component +of the VNF. It implements filtering and packet matching algorithms in order to +support the enhanced traffic forwarding capability of the VNF. The component +supports a flow table (exploiting hashing algorithms for fast indexing of flows) +and an inspection engine for traffic classification. The implementation used for +these experiments exploits the nDPI library. The packet capturing mechanism is +implemented using libpcap. When the DPI engine identifies a new flow, the flow +register is updated with the appropriate information and transmitted across the +Traffic Forwarding module, which then applies any required policy updates. +The Traffic Forwarding moudle is responsible for routing and packet forwarding. +It accepts incoming network traffic, consults the flow table for classification +information for each incoming flow and then applies pre-defined policies marking +e.g. type of Service/Differentiated Services Code Point (TOS/DSCP) multimedia +traffic for QoS enablement on the forwarded traffic. It is assumed that the +traffic is forwarded using the default policy until it is identified and new +policies are enforced. The expected response delay is considered to be +negligible,as only a small number of packets are required to identify each flow. + +Graphical Overview +================== + ++----------------------------+ +| | +| Virtual Traffic Classifier | +| | +| Analysing/Forwarding | +| +--------> | +| ethA ethB | ++------+--------------+------+ + | ^ + | | + | | + | | + v | ++------+--------------+------+ +| | +| Virtual Switch | +| | ++----------------------------+ + + +Install +======= + +run the build.sh with root privileges + +Run +=== + +sudo ./pfbridge -a eth1 -b eth2 + +Custom Image +============ + +TBD + +Development Environment +======================= + +Ubuntu 14.04 >= VM |