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The Edge Appliance Software, "EdgeAS", is installed on a server at network congestion points, typically between the LAN switch and the WAN router. At times of network congestion, minimum bandwidth guarantee policies dynamically allocate the specified minimum bandwidth to your key business applications to ensure consistent response times for those appliactions.

The software runs under Linux on a range of industry standard servers. A network failover card avoids it becoming a potential point of network failure.

EdgeASprovides instant per-second visibility to show the transient spikes on your network that last for just seconds but that are the underlying cause of slow response. These can be seen in real time and also historically for any previous period for which network  statistics have been retained.

The network statistics NetPriva Collector function collects unlimited per-second history with data roll up and retention parameters. There is a flexible SQL query interface for third party report writers for analysis and reporting of data held by the Collector.

Immediate "Top Ten" drill down on real time or historical traffic statistics is a key feature of EdgeAS. The drill down parameters are flexible and easy to set up and use. The picture presented takes the place of the reams of statistics that many network engineers still struggle with. Pinning down and rectifying the causes of response time problems with this degree of visibility is fast and responsive to user support calls. This enables you to get to the root causes of slow response times and other network problems easily and quickly.

NetPriva EdgeAS identifies network  traffic for your key business application such as ERP, Citrix, Email, and VoIP by readily known IP addresses, and commonly used port numbers. This provides certainty, and low cost of appliance hardware. For example a 1RU basic server can control links speeds up to 155Mbps.

NetPriva rule based policies enable dynamic bandwidth allocation and guaranteed bandwidth for each "important" application. Typically these are based on a "white list" of applications and users agreed with business management to reflect business service level and priority needs. This approach serves to align the network performance to real business needs.

The policies are easily set up and managed from either a  local or remote NetPriva Console. The NetPriva "white list" approach avoids the large system management overhead of trying to identify and deal with every application on the network. It also avoids the computational overheads that make hardware used in appliances expensive, and avoids the identification problems inherent in a heuristic approach to identifying applications by matching on "application signatures" (contrast this with NetPriva's Layer 7++ deterministic identification of all applications, and users through NetPriva EPDirect).

The effect of the NetPriva policy for an application is to provide guaranteed minimum bandwidth to the application covered by the policy at times of network congestion. The minimum bandwidth guarantee can be specified as a % of the WAN link bandwidth or as an absolute bandwidth in Kbps or Mbps. The policy comes into operation whenever there is congestion on the link. It does not restrict the bandwidth of other applications on the link if there is no important application traffic, or no congestion on the link.  

WAN application and user network statistics, including end to end round trip time, are captured by the EdgeAS and collected by the NetPriva Collector on the LAN adjacent to the EdgeAS for instant recall of any network scenario and for historical analysis and reporting.

Highly granular NetPriva application and user network statistics are stored in a relational database offering highly flexible and granular reporting from per second to per month reporting levels. The data base can be accessed via the NetPriva Console in a variety of "Top Ten" data graphical views. Each view has instant drill down facilities to establish the root cause of a network performance problem "as it is happening" or as it happened at an earlier time. The database can also be accessed via SQL query tools and a choice of third party report writers, including Crystal Reports.

NetPriva network statistics data facilitates capacity planning for WAN links to ensure it accommodates the total minimum bandwidth required for the time sensitive "important" application and user combinations that may be active at any one time.

NetPriva's queuing algorithms and technology are designed for efficiency of operation for both TCP and UDP traffic types, which is important for applications that use UDP and that are sensitive to latency. More information on the underlying technology is available in the NetPriva white paper Next Generation Queuing Whitepaper (pdf).

System notes
NetPriva EdgeAS may be run on certified 1RU  hardware platforms including Dell, Fujitsu Siemens, HP, IBM, MSI and the VIA "set top box".