sFlowTrend release notes

version 4.4.03

Released 05-Jun-2012

• Corrected an issue introduced in version 4.4.02, where very large and erroneous traffic spikes could occasionally be seen with certain sFlow implementations.
• Fixed several minor bugs with SNMP introduced in the previous release.

version 4.4.02

Released 27-Apr-2012

• Updated certificates used for signing sFlowTrend code, to avoid a certificate expiry issue.
• Changes to the SNMP library to improve robustness. Also added support for AES encryption for SNMPv3 privacy.
• For a virtual switch, added the ability to label an interface with the name of an attached virtual machine.

version 4.4

Released 21-Jul-2011

• Added event features. sFlowTrend now raises events when traffic levels cross defined thresholds and when various conditions in the operation of sFlowTrend are detected. Events are displayed in the Events Tab. In addition it is possible to configure notification of events via Email or syslog. For more details, see the sFlowTrend Help

version 4.3.03

Released 11-Apr-2011

• Fixed bug that caused sFlowTrend to stop receiving sFlow from switches that were configured using SNMP, to send sFlow.

version 4.3.02

Released 4-Apr-2011

• Corrected bug associated with including "/" in a subnet name.
• Fixed bugs with SNMP v3 which affected configuration of sFlow via SNMP.
• Fixed bug where charts and queries would fail when using Custom time periods of a month or more.
• Fixed bug when changing Options, if the user did not have admin permission.
• Fixed problem with filter generated when clicking on legend items in Top wireless versions, Top SSIDs, and Top channels charts
• Corrected problem with deleting agents.
• Updated the host look up RADB URL.
• Updated Japanese localisation bundle.

version 4.3.01

Released 24-Feb-2011

• Corrected an issue where the history back and forward menu items may not have worked correctly.
• Corrected a problem with reports, where it was possible to construct a query with inconsistent settings, which would then cause the query to fail.
• Several other minor bugs fixed, most of which would not be visible to users.

version 4.3

Released 20-Jan-2011

• Added the ability to bookmark favourite tabs and their settings so that you can easily return to the same tab, configured with settings, at a later time.
• Added support for importing and exporting reports.
• Defining reports using Javascript is now supported.
• Improved the formatting and presentation of reports.
• Various bug fixes and minor enhancements

version 4.2.01

Released 26-Oct-2010

• Added Japanese localisation.

version 4.2

Released 08-Oct-2010

• Added support for Host sFlow, including a new Host statistics tab. The Host statistics tab displays host performance metrics in tabular format and charts which trend performance metrics for hosts.
• sFlowTrend (free) now allows data collection from a maximum of 5 switch or host sFlow agents.
• Improved the host information lookup to display the end host location using the switch and interface naming conventions configured in Options.
• Improved the behaviour of the time selector, including fixing a bug so that the end time cannot be before the start time.
• Improved the function editor in Reports.
• Provided additional downloads for sFlowTrend-Pro (client/server):
  • Installer for 64-bit Windows with 64-bit JREs (for 64-bit Windows with 32-bit JREs, use the regular Windows installer)
  • RPM package
  • .deb file (for Debian-based distributions)
  Note: if you wish to use one of these new downloads and have a previous installation of sFlowTrend-Pro using the installer, uninstall sFlowTrend-Pro before reinstalling using the new download.

version 4.1

Released 29-Apr-2010

• Host location (switch port connecting the host to the network).
• Host information (MAC, MAC vendor, IP, country location).
• New clustering options for the Circles charts (country and switch).

version 4.0.1

Released 13-Jan-2010

• Added Japanese localisation.
• Fixed problem with downloading CSV data from tables in reports.

version 4.0

Released 05-Dec-2009

• A reporting package. Reports can be created, run, and results viewed in sFlowTrend, and via a browser, or as a PDF. The raw data from a report is accessible.
• A new Circles chart, which helps visualize flow of traffic between subnets.
• Many other bug fixes, and performance and feature enhancements.

version 3.1.04

Released 4-Nov-2009

• Fixed problems that prevented non-global SNMP settings to be configured for switches which had initially been conconfigured to use global SNMP settings.

version 3.1.03

Released 17-Jul-2009

• Fixed bug in decoding of exported 802.11 packet headers.
• Fixed bug with interpreting strings in sFlow extended fields.

version 3.1.02

Released 31-Mar-2009

• Corrected a problem in handling multi-byte characters when communicating between the client and server.
• Fixed a defect where a chart would not be updated at the end of the day, when viewing data for "today".

version 3.1.01

Released 07-Jan-2009

• Corrected an issue where, if the default duration of data retained is increased beyond a certain amount, then no data beyond the current hour would be retained.
• Corrected a problem which meant that if the sFlow port to use was changed, the service or application would need to be restarted to resume data collection.

version 3.1

Released 28-Nov-2008

• Added the ability to show traffic trend charts for all switches, or all wireless access points. This applies to sFlowTrend-Pro only.
• Global SNMP settings can be defined. If the global SNMP settings are changed, the new settings will be changed for all switches that use the global settings.
• Added support for SNMPv3.
• SNMP data from the ifTable and sFlow MIB is automatically refreshed periodically.
• Released sFlowTrend-Pro service for Linux.

version 3.0.01

Released 09-Oct-2008

• Added support for running sFlowTrend behind a web proxy server. If running sFlowTrend as an application,the proxy can be configured in Tools>Options>Advanced. If running sFlowTrend-Pro as a service, the proxy for the server is configured during installation of the server, and the client is configured through Tools>Options>Advanced.

version 3.0

Released 12-Aug-2008

This is a major release of sFlowTrend, introducing the option of running sFlowTrend-Pro as a service. When running sFlowTrend-Pro as a service, the server runs continually in the background and the sFlowTrend-Pro local or remote client is used as the GUI to access the collected data.

The free version of sFlowTrend can be only be run as an application.

Other new features in sFlowTrend v3.0 include:

• User access control.
• History navigator that allows you to move backwards and forwards through recently viewed screens, in a similar way to a browser's history navigator.

version 2.1

Released 25-Sep-2007

• Introduced support for sFlow for wireless.

version 2.0.04

Released 26-Jul-2007

• Resolved an issue where multicast or broadcast traffic discarded by a switch or router could cause sFlowTrend to stop receiving further samples.

version 2.0.02

Released 05-Jun-2007

• Resolved an issue with determing correct link speed with higher rate links. This could have impacted enabling of sFlow through SNMP on these links, as well as reporting the speed incorrectly.

version 2.0

Released 18-May-2007

• Release of sFlowTrend v2.0.

version 2.0-beta-1.11

Released 11-May-2007

• Added on-line help.
• Fixed an issue with enabling sFlow through SNMP on certain switches.

version 2.0-beta-1.10

Released 04-May-2007

• Fixed an issue where the built-in web server did not work correctly.
• Improved the charting for flows that are routed across a switch being monitored.
• Resolved an issue where the 'all interfaces' view displayed no data on some manufacturer's switches.

version 2.0-beta-1.07

Released 28-Mar-2007

• The Thresholds tab now includes automatic root cause analysis of threshold. This helps you to quickly determine the cause of unusual network traffic patterns.
• The Chart tab includes a progress indicator when a new chart is loaded or a chart is updated. This indicator allows the loading of a chart to be cancelled.
• Switches can now be enabled and disabled from the control bar in the Chart and tab.
• Resolved a problem with ethertype being set incorrectly in layer 2 flows.
• Resolved a problem with the incorrect scale factor being used for frames/s charts for interval sizes > 1 minute.

version 2.0-beta-1.06

Released 22-Jan-2007

• Charts tab now included custom filtering for top N charts. The filter can be any JavaScript boolean expression. JavaScript properties available for filtering can be found in the Filter bar by clicking on Edit.
• Legend items in top n charts are now clickable, allowing drilldown on selected addresses and ports etc.

version 2.0-beta-1.05

Released 09-Jan-2007

• The legend in the Counters chart is now selectable. Clicking on a legend entry causes only that statistic to be displayed.
• Drill-down from the dashboard and thresholds now selects the appropriate statistics in the Counters chart.
• IP addresses for sources and destinations shown in charts can be optionally resolved back to hostnames. If this causes excessive delay in creating a chart, the feature can be turned off using Tools > Options > Advanced: "Resolve IP addresses to hostnames in charts".
• The currently selected time in all charts is now retained when creating a new chart.
• Corrected an issue where the first switch to be added would not be enabled correctly through SNMP.

version 2.0-beta-1.03

Released 29-Nov-2006

This is a major new release of sFlowTrend, incorporating several new features:

• A new dashboard, which allow you to find quickly to top contributors to network traffic or errors, and drill down to the relevant chart.
• Configurable thresholds, which help you find network problems quickly by specifying custom bounds for network performance per interface. The top-level threshold status is also shown on the dashboard.
• A threshold tab, which allows you to view and configure the thresholds for any interface.
• Also incldued are many internal enhancements, particularly for performance and memory utilization.
• An integration interface is offered, to allow custom integration between sFlowTrend and other applications, such as switch device managers. sFlowTrend can be controlled by a web interface, available at http://localhost:8087. Please see Integrating sFlowTrend-Pro with other applications for more details.

version 1.2

Released 15-June-2006

• Additional charts are now available:
  • Top source VLANs.
  • Top destination VLANs.
  • Top inter-VLAN pairs.
• Improved startup performance.
• Resolved a minor problem with IPv6 protocol decodes.

version 1.1

Released 30-May-2006

• Several new charts are now available, including three which are security oriented. The new charts are:
  • Top source-destination pairs (top communicating source address/destination address pairs).
  • Top connections (similar to top source-destination flows, but includes both directions of a connection).
  • Top servers.
  • Top clients.
  • Top protocols.
  • Most connected sources (top sources by the number of destinations connected to. This is a security oriented chart, also refered to as 'fan-out', and can be used to find hosts exhibiting scanning behaviour).
  • Most connected destinations (top destinations by the number of sources that have connected. This is a security oriented chart, also refered to as 'fan-in', and can be used to find hosts that might be victims of distributed denial-of-service attacks).
  • Most popular protocols (top destination protocols by number of source-destination pairs. This is a security oriented chart, which can be used to find quickly protocols that are suspected of being used in scanning behaviour).
• Charts can now be generated for all the interfaces on a switch, as well as specific interfaces. Select 'all' in the interface list for this.
• Activity 'LED', which shows incoming sFlow samples by flashing. This quickly indicates if sFlow is being received by sFlowTrend. If the LED is not flashing, then a firewall might be blocking the sFlow port (UDP:6343).
• Hovering the mouse over the activity LED shows the current incoming sample rate.
• Improved handling of multicast traffic.
• Improved accuracy of charts.

version 1.0.1

Released 17-Apr-2006

• Resolved an issue where IPv6 addresses were not processed correctly.
• Performance and memory usage enhancements.

version 1.0

• Initial release