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 NetDisturb

 Impairment Emulator Software for IP Networks (IPv4 & IPv6)

 10, 100, 1000 Mbps || Accuracy = 1 millisecond
 
Windows 2000, XP & Server 2003

 Overview & Applications
NetDisturb

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.

 

NetDisturb synoptic

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 Click to download LanTraffic V2 Performances...

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)

Click to download LanTraffic V2 Performances...

Applications

• Test of IPTV set top boxes and IPTV quality testing
• Simulation of satellite links
• Performance & Acceptance Tests: Qualify and evaluate the behavior of IP equipments (phone, fax, gateway, etc.) and applications (audio and video streaming, etc.) on IP networks.
• Configuration and control of IP Equipments for product verification and test: Define different QoS levels in an Intranet or Internet environment to configure terminals, gateways and routers.
• Test Laboratories: NetDisturb provides repeatable QoS on different flows using configuration mode and values (loss, duplicate, delay, packet content impairment) defined by the user, and so re-create real world problems in the lab.
• Applications test: NetDisturb allows testing applications such as Voice over IP, streaming audio and video, and other distributed applications.
• Emulation of symmetric or asymmetric network conditions (LAN, MAN, WAN): latency, jitter, packet loss, bandwidth limitations, etc. to test IP applications (VoIP, streaming audio & video, etc.), services and products sensitive to various real conditions.
• and more...

ZTI first developed this software tool for France Telecom, who has been using it to test VoIP and IPTV service offers, IP equipments (gateways, PBX, routers ...) and applications (video over IP).  

 

Product requirements

 

- Platform: Pentium PC running Windows 2000, XP or Server 2003 and at least 256 MB Ram.
- Hyper-threading and PC multiprocessors are also supported.
- Two Identical Network Interfaces Cards (NIC): Ethernet, Fast Ethernet, or Gigabit Ethernet.
-1024 x 768 display, DPI setting = Normal size (96 DPI) and Font size = Normal.

 

License information

 

NetDisturb is licensed on a per workstation basis.
You will need to purchase a separate license for each PC you install it on.

 

IP software testing tools, IP networks measurement tools and ATM and ISDN testing tools from ZTI

 

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