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Service Function Chaining (SFC) is a key enabler for network slicing in the Fifth-Generation (5G) mobile networks. Despite the ongoing standardisation activities and open source projects in addressing SFC, built-in 5G network support for SFC has not been sufficiently addressed on 5G Multi-tenant infrastructures. This paper proposes an Service Function Forwarder (SFF) and Classifier which is able to provide network slicing capabilities to the Service Data Plane in this type of infrastructures. The proposed prototype has been implemented as an extension of the popular Open Virtual Switch (OVS). The results of the empirical validation demonstrate that the proposed prototype is able to deal simultaneously with up to 8192 network slices with a maximum delay of 11 microseconds and 0% packet loss processing traffic at speeds up to 20 Gbps in a 5G architecture. The performance values achieved in this work are compliant with the 5G KPI expectation.

There is a significant lack of software fire-1 walls for 5G networks especially when the support 2 for the Internet of Things (IoT) technologies such as 3 NB-IoT are considered. The main contribution of this 4 research work is an advanced software firewall based on 5 the Open Virtual Switch (OVS), which is able to provide 6 firewall capabilities over these 5G IoT devices. The 7 proposed software firewall is able to significantly scale 8 up the number of rules to fulfill the 5G Key Performance 9 Indicator of controlling 1 million IoT devices per square 10 kilometer. Intensive experimental results are achieved 11 in this work, validating the suitability of the proposed 12 architecture for this remarkable level of scalability. In 13 the most demanding conditions, where more than 1 14 million of firewall rules are installed and 1 million NB-15 IoT devices are sending traffic, yielding a total of 4 16 Gbps, the system shows only 8% of packet loss and 4 17 ms delay.