Posts Tagged ‘Multi-Segment Analysis’

How to Use Multi-Segment Analysis to Troubleshoot Network Delay and Packet Loss

October 8th, 2015 No comments

Troubleshooting network problems can be a very intensive and challenging process. Intermittent network problems are even more difficult to troubleshoot as the problem occurs at random timeswith a random duration, making it very hard to capture the necessary information, perform troubleshooting, identify and resolve the network problem.

While Network Analyzers help reveal problems in a network data flow, they are limited to examining usually only one network link at a time, thus seriously limiting the ability to examine multiple network segments continuously.

Colasoft’s nChronos is equipped with a neat feature called multi-segment analysis, providing an easy way for IT network engineers and administrators to compare the performance between different links. IT network engineers can improve network performance by enhancing the capacity of the link according to the comparison.

Let’s take a look how we can use Colasoft nChronos’s multi-segment analysis feature to help us detect and deal effectively with our network problems.

Multi-segment analysis provides concurrent analysis for conversations across different links, from which we can extract valuable information on packet loss, network delay, data retransmission and more.

To being, we open nChronos Console and select a portion of the trend chart in the Link Analysis window, then from the Summary window below, we right-click one conversation under the IP Conversation or TCP Conversation tab. From the pop-up menu, selectMulti-Segment Analysis to open the Multi-Segment Analysis window:

Figure 1. Launching Multi-Segment Analysis in nChronos

In the Multi-Segment Analysis window, select a minimum of two and maximum of three links, then choose the stream of interest for multi-segment analysis:

Figure 2. Selecting a stream for multi-segment analysis in nChronos

When choosing a conversation for multi-segment analysis, if any of the other selected network links has the same conversation, it will be selected and highlighted automatically. In our example, the second selected link does not have the same data from the primary selected conversation and therefore there is no data to display in the lower section of the analysis window.

Next, Click Start to Analyze to open the Multi-Segment Detail Analysis window, as shown in the figure below:

Figure 3. Performing Multi-Segment analysis in nChronos

The Multi-Segment Detail Analysis section on the left provides a plethora of parameter statistics (analyzed below), a time sequence chart, and there’s a packet decoding pane on the lower right section of the window.

The left pane provides statistics on uplink and downlink packet loss, uplink and downlink network delay, uplink and downlink retransmission, uplink and downlink TCP flags, and much more.

The time sequence chart located at the top, graphically displays the packet transmission between the network links, with the conversation time displayed on the horizontal axis.

When you click on a packet on the time sequence chart, the packet decoding pane will display the detailed decoding information for that packet.

Using the Multi-Segment Analysis feature, Colasoft’s nChronos allows us to quickly compare the performance between two or morenetwork links. If you’re a network administrator, engineer or IT manager, we strongly suggest you try out nChronos today and see how easy you can discover and deal with network problems.



Colasoft Delivers nChronos v4.3 with Multi-Segment Analysis

November 23rd, 2014 No comments

Colasoft Delivers nChronos v4.3 with Multi-Segment Analysis

Tulsa, OK – November 19, 2014– Colasoft LLC (, an innovative provider of network analysis solutions, today announced a new version of its flagship product, nChronos Forensic Network Analysis Application. The multi-segment analysis leverages the packets recorded by nChronos to make it easier and quicker for network professionals to analyze the root cause of distributed application performance issues.

Most IT managers are have similar difficulty in diagnosing and solving application performance issues. It’s difficult to determine if the fault is in the network, the application, the server, or something else that is unknown. Hours or days are wasted in “finger pointing”. There are many components involved and troubleshooting a multi-segment network is difficult at best. In the past, IT professionals had to capture traffic separately from different points and manually merge the information into a single trace file to determine the root cause. nChronos will now automatically discover which packets and applications were seen at multiple points in the network. nChronos packet data recorder uses advanced algorithms to match data packets across the network. With nChronos v4.3, network problems such as latency, application errors, network anomalies or slow response can be tamed with greater ease and expediency.

nChronos v4.3 provides an even greater user experience with new and useful functionality and improvements. Below are some of the highlights of these new features included in nChronos v4.3:

  1. New views are added including a VLAN View, a MPLS VPN View, a Service Access View and a Port View.
  2. Provides millisecond-level traffic statistics and alarms for network links.
  3. Storage filter is available and packets can be stored with specified length.
  4. Application transaction alarms and application transaction alarm logs are now available.
  5. Packets can be downloaded from multiple network links.
  6. Combination analysis for IPv4 and IPv6 is available.
  7. The packets can now be stamped with switch time.

“We continue to provide an increase in value with additional functionality without sacrificing our easy to use interface. With the addition of multi-segment analysis, as well as the improved Alarm and Reporting function, nChronos now automates the previously tedious process of troubleshooting distributed network issues, with greater efficiency and ease.”, said Brandon Lewis, Director of Customer Support at Colasoft ”.

The evaluation version of nChronos 4.3 is now available on the Colasoft website