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Networked Applications
Testing with Network Emulator
Ensuring end-user satisfaction in a network-centric world
The demands on the corporate network are constantly increasing and so
are performance expectations. End users assume they can use their IP phone
for the conference call (with the same reliability as the PBX) and follow
the presentation broadcast to their PC from Asia (with the same performance
as their cable TV at home) while catching up on managing their data in
the company ERP database on the other coast (with sub-second response
times). All on the same network. The one you’re responsible for.
Many distributed applications are sensitive to network conditions, such
as:
* Mission critical enterprise applications
* Transaction-oriented applications
* Conferencing systems
* VoIP
* IPTV
* Streaming media
* Gaming
* VPNs
End-user satisfaction in a network-centric world isn’t a natural
by-product of connecting the devices. It is the result of careful planning
and testing to account for all the factors that can impact application
performance. Examples of these metrics are:
* Delay
* Jitter
* Packet Loss
* Packet Sequencing
* Bit Errors
* Available bandwidth
Understanding distributed application performance is also important for
conducting capacity planning. Capacity planning can optimize network infrastructure,
reduce costs, accommodate future growth and provide insight into how resources
are used. Effective capacity planning requires analyzing end-to-end performance
in order to understand which applications and hosts use which resources
and how the applications perform for end users, particularly in the presence
of network impairments.
Unfortunately, testing the performance of distributed applications means
running the applications under various network conditions to evaluate
how they respond. Spools of fiber can be used to characterize the delay
associated with long-haul networks, but they can’t be used to vary
delay or emulate other QoS metrics. Testing applications under realistic
network conditions requires the use of Anue Network Emulators.
Anue Network Emulators allow you to precisely control the amount of errors,
delays and other impairments that you add to network traffic during testing.
By running critical networked applications in a realistic emulated environment,
you can establish, maintain and optimize performance and availability.
Anue GEM and XGEM Network Emulators can emulate up to 64 different network
profiles simultaneously at full line rate for all packet sizes, enabling
you to reproduce with accuracy any network configuration and condition,
including delay, jitter, errors, drop, reorder, fragmentation, duplication,
buffering, flow control, and bandwidth constraints.
With Anue Network Emulators you can emulate real world scenarios in the
lab–accurately, repeatedly and efficiently–in order to:
* Pro-actively plan for increased capacity requirements as the organization
grows or deployed user-base increases.
* Assess the sensitivity of your distributed applications to variations
in traditional QoS parameters such as bandwidth, packet loss, delay, and
jitter.
* Determine how resource sharing can lead to degradation of performance
due to network congestion.
* Identify the best techniques (buffering, QoS, MPLS, bandwidth shaping)
to assure quality of experience for the end user.
* Find problems early, before deployment, to improve the quality of your
products and services.
Since 1997, Gillaspy Associates has built
a solid reputation for developing strong relationships with our customers
by providing quality solutions and ongoing support.
Downloads
Anue Network
Emulation vs. Fiber Spools
Related Pages
Data Recovery
Network Emulator
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