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NetDisturb is an IP network emulator software that can generate impairments (latency, delay, jitter, limited bandwidth, lost and duplication packets) over IP networks. NetDisturb allows the user to disturb flows on an IP network (IPv4 or IPv6), and thus to study the behavior of applications, devices or services in a disturbed network environment.

NetDisturb is inserted between two Ethernet segments (on the same IP network or two different IP networks) and operates bi-directional packet transfer on Ethernet, Fast Ethernet and Gigabit network interface cards.

Based on a Client-Server architecture, NetDisturb is made of two parts:
- The Server handles the impairment characteristics
- and the Client manages the Server using a powerful and intuitive graphical interface

This allows two configurations where the Server and the Client may be installed on the same PC (local control), or the Server is located on one PC and the Client is located on another PC (remote control) and dialogs with the Server by using a communication link (Wan, Lan...).

Both configurations require two identical Ethernet NICs for the Server. We recommend to use two identical NICs for performance reasons.

Please refer to the PDF document for a general overview of NetDisturb software

Netdisturb is based on the notion of IP flows. A flow is a set of packets with a set of common packet properties, and can be unidirectional or bi-directional. Flows are part of sessions (successions of flows and "think times") related to some homogeneous user activity (e-commerce, mail, IPTV session...).
NetDisturb can generate impairments (unidirectional or bi-directional) on 16 IP flows user-defined simultaneously.
It is possible to use a trigger to link the launch of the impairments with an event for an IP flow.
NetDisturb offers also two working modes by applying impairments:
- Enable / Disable desequencing of the packets in a flow,
- Impairments laws apply to the IP flow or to each TCP/UDP connection of the IP flow.

Impairment laws handled by NetDisturb

Pre-defined Loss and Duplication laws:
- Loss: Constant Law. Parameter: number of packets
- Loss: Uniform Law. Parameters: alpha, beta, threshold
- Loss: Burst Uniform Law. Parameters: alpha, beta, threshold(n), threshold(n + x), depth
- Loss: File (Loss Values). Parameters: file name, threshold
- Loss: Percentage. Parameter: percentage
- Loss: 1 Packet out of N. Parameter: range(N)
- Loss: Percentage & Duration (time-limited losses percentage). Parameters: percentage, duration
- Loss: File (Percentage & Duration). Parameter: file name
- Duplication: Percentage (send n times the received packet). Parameters: percentage, Min ≤ n ≤ Max
- Duplication: 1 Packet out of M (duplicate 1 packet n times every M received packets).
  Parameters: range(M), Min ≤ n ≤ Max
- Duplication: Uniform Law. Parameters: alpha, beta, threshold
- Loss (1 out of N) then Duplication (1 out of M): the loss law (1 Packet out of N) is used first before
  the duplication law (1 Packet out of M)

Pre-defined Delay & Jitter laws:
- Constant Delay. Parameter = constant delay
- Constant Delay & Exponential Jitter. Parameters: constant delay, λ
- Constant Delay & Uniform Jitter. Parameters: constant delay, alpha, beta
- Constant Delay & File (Jitter). Parameters: constant delay, user file
- File (Packet Sending Minimum Cadences). Parameter: user file
- Router Simulation & Constant Delay. Parameters: IP throughput, max memory, constant delay
- Router Simulation & File (Packet Sending Minimum Cadences). Parameters: IP throughput, max memory, user file
- Constant Delay & File (Throughput & Duration). Parameters: constant delay, user file

Pre-defined Content impairment laws:
- 1 Packet out of N Parameter: range(N)
- Percentage. Parameter: percentage
- Normal Law (Laplace-Gauss). Parameters: average, standard deviation, threshold
- Uniform Law. Parameters: alpha, beta, threshold

Performances

Please refer to the PDF document for a detailed view of the performances on Gigabit networks realized by our labs (Version 4.6). In short (Gigabit Ethernet / Incoming & Outgoing throughput): 975 Mbps (TCP / 16 IP Flows) ; 970 Mbps (UDP / 16 IP Flows)

Applications

Product requirements

License information