Ip Network Testing Techniques And Methods Of-ip Network, Testing, Cn2 Network - Communications

A high-quality network design and positioning through business

, network design, equipment selection, construction, program verification, and continuous optimization, maintenance and management of six areas to ensure that, where equipment selection, program verification and optimization, mainly through selection

Test And network testing to achieve. To this end China

Telecommunications In early 2004 and early 2005 were organized CN2 project equipment selection test and network acceptance testing. Two tests are considered to be the world's high-end industry

Router And traditional Internet integration to the next generation multi-service bearer network transformation roadshow.

To demand-oriented networks To the network demand, according to the requirements of network operators to develop testing equipment to test the content to adhere to the basic method. "Turnip greens, all have love," is on the selection test, because the equipment is ultimately selected to be used by a particular network, so must the network's "taste" to evaluate the options. Will test the positioning in the network rather than equipment, is also a carrier test and test equipment vendors or third-party unit testing within the essential difference between, CN2's test is meaningful only closely linked to the network.

CN2 network is based on profit targets "fine mesh" at all levels of China Telecom have a lot of vision to her: the ability to carry

Business Great customer, voice, video, data and other services unified multi-service bearer network, with high

Security And QoS guarantees. Such networks require equipment with the capacity of six,

Package Include: scalability, high availability, multi-service integrated carrying capacity to distinguish between

Service Providing capacity, manageability and security. Analysis of these capacity requirements, it is converted to a complete test and evaluation index system, including: equipment availability and the control / forwarding plane's stability, exchange capacity and routing /

Label / Multicast capacity, traffic forwarding capabilities, fast route convergence and fast reroute (FRR) capabilities, quality of service (QoS) capabilities, MPLSVPN and multicast service capability,

IPv6 Capabilities, network management and security capabilities.

Content based on network demand and test after test in specific projects, the deepening of China's telecommunications needs of the details of the definition of test targets and parameters, design test method. To IGP fast route convergence test, for example, because the demand is ISIS CN2 within any single circuit or single router failure, the whole network within ISIS agreement must be in the second convergence. Thus, according to CN2 network engineering construction specifications, rapid convergence in the device configuration mechanism and related time parameters. Of CN2 network structure, a fully reflect the structural features of the simulation topology used to measure the

Table Broadcasting To the DUT. Simulation network topology contains 1200 nodes devices, 6000 link; including the core, aggregation, edge three-tier network architecture, a wide Full-Mesh, 2 1 dual homing, 3-2 pairs of return; core , tandem, the number of nodes between the edge ratio is 1:4:20. Topology routing segment where the first link the nodes connected subnet, not enough to add child nodes from the edge layer routing. Analog network is a common single circuit or single router failure type, test out the equipment in the simulation of the rapid convergence of the network capacity.

Scientific and comprehensive organizational network test

The CN2 on such a large scale, complex network of in-depth testing, to solve technical issues include: the testing standards on sound science and the acceptance of targets identified in the test methods with limited resources for full study many aspects of such a large scale network functionality, performance and capacity. To this end, China Telecom in the index system of identification and quantification, test methodology, instrumentation and equipment capacity, test selection, error calibration and other aspects of intensive research.

The CN2 network of scientific tests have fully considered the following aspects:

Selected sampling points Using scientific sampling methods. Considering business operations model, forecast network traffic, the network level, device type, link type,

Geography Sub-location and room Cloth So, select the test node; test path selection of comprehensive coverage of the path nodes at different levels, including between the core, core to the non-northern provinces (autonomous regions and municipalities) tandem, the core to the northern edge of non-operational control points.

Calibration error Delay in all test-related items, in all the test nodes with precision clock synchronization devices

GPS Calibration time and NTP synchronization mechanism to eliminate the time error is generated. Meanwhile, the test data through the instrument correction and compensation network management software test results.

Testing methods were complementary and more

Function testing: "black box" testing, through the application of (www, dns, telnet, ping, trace, etc.) test and check the operation of the network status (such as View the routing table, QoS queue information, etc.).

Performance testing: performance testing of equipment built

Proxy The main secondary instrument testing (mainly used to verify the former; quantitative restrictions by instrument, can only select a limited node), based on stream in the background to send test flow, and statistical data, calculation results.

Business experience validation: application of the system through the use of subjective feelings of the network's operational capacity.

Capacity Test: The instrument analog network equipment, sending a large number of control information (such as BGP routing). Since the control information is automatically transmitted to the entire network, so the number on the meter, there is no extra demand node selection.

Fully tested multi-angle Function test: test the network functions such as routing, QoS, VPN, multicast, security, network management function is normal, this is the most basic and most important test.

Business performance test: test the network latency, packet loss rate, jitter, fault switching speed. Performance test results will show the possible future CN2 network quality of service.

Network capacity test: test the network capacity, mainly to control the level of capacity, such as support for the IGP, BGP routing number, the quantity of multicast group. Capacity test data represent an extension of CN2 network.

Business superposition

Years of test experience shows that many devices individual test results was good, but when doing business stack test data change dramatically. On the selection test, the stack operations more comprehensive, in-depth practical work test equipment; on network testing,

by: gaga

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