Fast Flow Technology

While traditional packet-based networks have advanced in networking performance, one of their fundamental strengths is also a limitation– routers and switches process individual packets one at a time independent of context. Given the exponential growth in quality sensitive real-time TCP/IP traffic such as video and voice, coupled with the general nature of IP communications susceptible to delay, jitter, and retransmissions, today’s Internet is suffering from significant network congestion and under-utilization.

The quantum step forward to realizing the potential of IP networking requires shifting the focus from processing individual packets to managing individual flows.

Application developers are turning more and more to use of multiple flows in order to maximize the bandwidth for their quality sensitive, bandwidth intensive broadband applications such as video conferencing, OTT video, interactive on-line gaming, and VoIP. Anagran eliminates traffic congestion in the world’s busiest IP networks using Fast Flow Technology ™, developed specifically to mitigate IP peak traffic conditions.

Congestion is unavoidable in IP networks and results in high delays, dropped connections, poor quality of experience (QoE), and overall user disappointment with their broadband service. Traffic peaks frequently exceed network capacity based on various factors such as mix and consumption behavior of differing applications. As noted in a recent issue of Business Week, with the dramatic growth in high-bandwidth, quality sensitive real-time entertainment applications such as streaming video, the challenges facing the Internet are formidable.

Nonetheless, many network operators over-engineer capacity in transmission facilities in an attempt to mitigate congestion-induced performance problems. Purchasing excess capacity is obviously not an economically viable long-term strategy. A better solution is required that can be deployed transparently in today’s Internet infrastructure to manage disruptive IP congestion and enable optimum use of network bandwidth.

By maintaining awareness and insight into all flows passing through it, Anagran’s FR-1000 manages diverse traffic profiles in a way that best matches the network’s established policies for service delivery and quality. Anagran’s Behavioral Traffic Controlâ „ cents (BTC) enabled Internet traffic managers (ITMs) optimally managing all traffic by flow class at the most efficient, cost-effective points in the network, consistent with accepted network management bandwitdh utilization policies.

BTC monitors every flow, constantly comparing each flow’s behavior over time against a simple set of operator-defined rules. BTC can identify flows that, by virtue of their duration, byte count, source/destination, or other criteria, require some form of policy management, executed in a fair, equitable, and balanced mannner.

An inherent characteristic of IP networks is that they tend to allocate bandwidth as equally as possible among all flows. This was a natural architectural characteristic of the Internet at its onset and served as an equitable mechanism to easily and automatically allocate bandwidth. Unfortunately, aggressive multi-flow applications, peer-to-peer (P2P) being the best known example, have taken advantage of this architectural characteristic by opening up large numbers of flows. A large file transfer, for example, could be divided into ten segments and sent over ten parallel TCP connections. The receiving computer reassembles the segments into a single file and the overall file transfer will complete much more quickly than if the single file had been sent over a single TCP connection. While cleverly exploiting the inherent design of TCP, these applications obtain greater throughput by utilizing more than their fair share of the bandwidth at the expense of other users on the network.