Networking

OpenFlow is a standard protocol of SDN which assist SDN Controller to communicate directly with the forwarding plane of network devices such as switches and routers, both physical and virtual (hypervisor-based), so it can better adapt to changing business requirements. Generally the conventional switches forwards the packets which are called the Forwarding Plane and do high-level routing that happens on the Control Plane which occur on same device but in OpenFlow switch it separates the forward plane from the control …

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Tcpdump is a network sniffer tool. It is most powerful and widely used command line tool for Linux/Unix. It sniff or capture the TCP/IP traffic that receive or transfer over a network. tcpdump has an option to save captured packets in a file for future analysis. It can be save in a pcap format file, that can be viewed by tcpdump command or a open source GUI based tool called Wireshark (GUI Network Packet analyser tool) that reads tcpdump pcap format files. 1. Prequisite for …

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