Healthy VoIP Nets�Part LI�Network Management Architectures: SevOne

SevOne, Inc., headquartered in Newark, Delaware, is a privately held software company founded by computer scientists from the University of Delaware.

These innovators served as network architects for leading financial institutions, and became dedicated to providing next-generation tools and services that enable enterprises to keep increasingly complex networks and applications functioning at peak performance levels.

Their unique combination of real-world experience and academic insight enabled them to design a next-generation, peer-to-peer, distributed architecture. They also leveraged the latest Web 2.0 development tools, including an extensible service architecture that resulted in improved performance, scalability, and flexibility for network and application performance management.

SevOne delivers a fully distributed, highly scalable network and application performance management system that claims to outperform larger, legacy framework systems from Computer Associates, IBM, InfoVista, and others, but at a much lower price point.

The system includes six key components: SNMP Network Polling, which measures down to one second intervals; NetFlow, SFlow and IPFIX, which measures top traffic devices and conversations on the network; QoS, which measures the quality of service for VoIP and multimedia applications; Latency Measurement, which provides an alerting mechanism for devices which cannot be polled directly; Realtime Reporting, a flexible reporting engine which includes instant charts and graphs; plus Event Alerts, a real-time alerting console that uses email, text messaging and fax.

All SevOne appliances contain the same integrated set of software modules needed by network engineers to keep a network performing well. These modules include:

  • Instant Graphs: allows the viewing of the status of every network element in the enterprise. A flexible reporting engine creates real time, ad-hoc reports which are displayed with just a few clicks of the mouse. If a link or device experiences trouble, the real time status can be reviewed, and historical data and trends examined (see Figure 1).
  • NetFlow Reporting: the reporting engine (named FlowFalcon) provides network engineers with an application and network monitoring tool for layer 3 and 4 analysis. This tool extends the capabilities of utilization statistics, allowing the display of the top talkers, top applications and top protocols on the network (see Figure 2).
  • Report Manager: the report manager allows the creation of daily, weekly or monthly status reports that analyze the core of the network and key transmission links. Once set up, the reports can be easily recreated, and can be set to be automatically emailed to any number of people in the organization in a pdf format (see Figure 3).
  • Policy/Threshold Editor: allows the configuration and generation of alerts based upon the performance data that has been gathered. The threshold can be based upon a number of factors, including network utilization, CPU utilization, error count, packet loss, Quality of Service (QoS) and Mean Opinion Score (MOS) (see Figure 4).
  • User Manager: enables administrators to define role-based permissions for the end users, plus checking credentials both internally, and with external systems, such as TACACS and RADIUS.
  • Dedicated Flow Collector: a dedicated appliance for use in organizations that have heavy NetFlow reporting requirements, and designed to ease the collection and reporting of massive amounts of NetFlow data.
  • Hot Standby Appliance: utilizes the same hardware and software as the primary appliance, and maintains its memory cache and disk storage in sync with the primary appliance. It is configured to only take over the monitoring function when a failure of the primary device occurs, and therefore does not put any additional strain on the network.

In addition, SevOne is designed with a distributed peer-to-peer architecture, which enables administrators to log into one SevOne appliance and retrieve data from across the entire network infrastructure. Several versions of the appliances are available, capable of monitoring from 5,000 to 60,000 network elements.

Further details on the SevOne architecture and products can be found at Our next tutorial will continue our examination of vendors’ network management architectures.

Copyright Acknowledgement: © 2008 DigiNet Corporation ®, All Rights Reserved

Author’s Biography
Mark A. Miller, P.E., is President of DigiNet Corporation®, a Denver-based consulting engineering firm. He is the author of many books on networking technologies, including Voice over IP Technologies, and Internet Technologies Handbook, both published by John Wiley & Sons.

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