Healthy VoIP Nets�Part XIV�Network Management Architectures: Network Instruments

Network Instruments' management toolset is built on a single code base, making it a highly integrated solution.

 By Mark A. Miller
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Network Instruments, LLC, headquartered in Minnetonka, Minnesota, is a developer of distributed and affordable network management, analysis, and troubleshooting solutions.

In 1994 they developed the Observer, the first Windows-based protocol analyzer, and also the first product to troubleshoot switched environments. Since that time the Observer has grown into an entire family of network management, analysis, and troubleshooting solutions, that include capabilities for protocol and packet-level analysis, network design, optimization and mapping tools, and SNMP-based enterprise management, including embedded agents and/or probes.

All of the Network Instruments products are designed utilizing its Distributed Network Analysis (NI-DNA) architecture, meaning that all solutions are based on a single code set. The architecture includes two key components: a probe which collects data regarding a local or remote network’s operation, and a console, which displays the data.

Remote probes can be installed on many types of networks, including 10/100/1000 Ethernets, WANs and wireless networks, with the control and monitoring of the probes allowed from any location, whether local or remote. Since the probe and console are derived from the same code, they work together as a seamless, integrated solution. This unified code set also allows an easier transition to additional topologies, as minimal training is required as the network grows or evolves.

Observer console interface
Figure 1 – Click to see full-size image

The console part of the system, is called the Observer. It provides network, application, and in-depth VoIP performance analysis, with call quality scoring and VoIP metrics on a per-call or aggregate level. It can also reconstruct calls for IT staff to listen to and review.

One of the big advantages of Observer is its ability to display all applications running on the network alongside VoIP traffic, since other applications can affect VoIP quality. Observer handles real-time performance issues with over 70 VoIP-specific metrics, plus over 50 event-based and threshold-based VoIP Experts. The system provides in-depth problem identification and resolution, as well as alerts to VoIP quality issues—including alarms for unacceptable jitter level, lost packets, or alterations in the QoS stream (see Figure 1).

The console is available in three versions.

The Observer Standard can capture, view, and decode over 590 different protocols of network traffic in real time, analyze the network traffic to diagnose critical problems, and collect long-term trending statistics for proactive management operations.

The Observer Expert can also track the network applications, and includes an extended level of VoIP analysis, conversation tracking, and performance predictions. For VoIP applications, it can monitor over 70 call quality metrics.

The Observer Suite provides all of the functionality of the Observer Standard and Observer Expert, plus SNMP device management, and remote monitoring (RMON) management.

This article was originally published on Feb 26, 2008
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