NST Network Interface Bandwidth Monitor: Difference between revisions
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Revision as of 09:48, 27 November 2011
Overview
The NST Network Interface Bandwidth Monitor is an interactive dynamic SVG/AJAX enabled application integrated into the NST WUI for monitoring Network Bandwidth usage on each configured network interface in pseudo real-time. The image below is an example display of the bandwidth monitoring application for network interface: "eth0". Also shown is an included Ruler Measurement tool overlay to perform time and bandwidth rate analysis.
A use case for the Bandwidth Monitor can be found in the Wiki article: "LAN Ethernet Maximum RAtes, Generation, Capturing & Monitoring".
SVN: 2502
Screencasts
The following screencast provides a brief introduction to using the Network Interface Bandwidth Monitor:
Feature Summary
The following are key features of the NST Network Interface Bandwidth Monitor tool:
- Graphically monitor Network Bandwidth rates on each configured network interface within the NST WUI.
- User selectable network interface network interface to monitor.
- Interactive display using dynamic SVG (Scalable Vector Graphics).
- User selectable AJAX query updates providing a pseudo real-time Bandwidth Rate presentation.
- Automatic and manual bandwidth rate scale adjustments.
- Pause individual graphs for analysis or synchronization both Received/Transmit graphs when using a TAP for monitoring.
- Adjustable graph dimensions for long duration bandwidth monitoring.
- Customize network interface graph titles.
- Graph controls for visual appearance including fill and opacity setting.
- Zoom controls for graph size enlargement and Full Screen viewing.
- Crosshairs overlay for exploring time and bandwidth values.
- A Ruler Measurement tool overlay for time and bandwidth rate analysis.
NST Bandwidth Monitor Reference Diagram
SVN: 2703
The image below can serve as a reference diagram for the NST Bandwidth Monitor. Many of the Bandwidth Monitor features have been identified and marked on the image. A Threshold Pause feature that allows "Pausing" of one or more Bandwidth Monitoring graphs when a configured Threshold Armed Rate value is Reached or Exceeded (i.e., Triggered) is also shown.
The Threshold Pause session was configured on the "p1p1 Bandwidth Monitoring" graph with an Armed Rx bandwidth data rate of: "8.3 Mbps". This bandwidth rate must be maintained for the Armed duration of "2400 msecs" before a Threshold Trigger can occur. A Threshold Trigger event did occur on 2011-11-17 07:59:12.430 at an Rx data rate value of: "14.16 Mbps". A Post Trigger Delay of "5 seconds" was in effect. Two bandwidth monitoring graphs were set to be Paused: p1p1 and em1. A query rate of "200 msec" was also configured for bandwidth monitor graph updates.
All notification executables located in directory: "/etc/nst/notifications/bwmon" were run at each Threshold Pause state change marked with ID: "GXC-9116".
The traffic generated for this example was from a YUM update. A Dualcomm DGCS-2005L TAP was used on the external side of a firewall and presented the network traffic to interface: "p1p1" .
NST Bandwidth Monitor: Multi-View
Large Multi-Network Interface Adapter Server Configuration Example
This example shows the bandwidth monitoring application for selected network interfaces: "em1, em2, em8 and lo" on a NST system configured with eleven (11) network interfaces.
