Test solutions for redundant links

With the rapid development of communication technology, the role of network in daily work is increasing, and Ethernet has gradually become the communication foundation in various fields.When in practical use, breakdown of links or communication equipment often occurred.For some applications with high requirements for network communication quality, single-link is difficult to meet the reliability requirements of the system, so the dual-link redundancy scheme is generally used for communication.In the dual-link redundancy solution, there are two links, primary and backup, and communication is generally carried out through the primary link during normal operation.When the primary link breakdown, the system automatically changes to the backup link to continue working.The two-link redundant communication scheme has been widely adopted, but there is a lack of corresponding test tools to improve development efficiency and system reliability.

The redundant link tester mode of Ethertone WT2100 has two groups (two links per group, a total of four) 10/100/1000M adaptive Ethernet links, and each link has a dedicated Ethernet switch on each port.The equipment adopts the hardware architecture of FPGA + CPU, and the physical link can be connected and disconnected through the on/off of the FPGA control switch.In this functional mode, users can remotely control link on/off from the client, quickly and accurately measure the change time of primary and backup links and change on/off status of redundant links.

Function 1: Measurement of the changing time of the primary and backup links

A single WT2100 has four redundant test links, which can form two sets of primary/backup test link pairs, and can measure the changing time of two sets of primary/backup links at the same time.By using the Ethernet switch chip to control the link on-off, the on-off delay can be controlled within 20ns to ensure the measurement accuracy of the changing time.

• You can set the judgment conditions for determining the connection of the backup link according to the test requirements

• The changing time can be measured automatically and repeatedly according to the set number of times

• Measurement results can be exported

Function 2: Redundant links cycle on/off

The redundant link cyclic on and off function can automatically change the on and off state of the link according to the set number of times and the connection and disconnection time.By setting the changing mode, you can also choose to change only one impaired link.In scenarios where the test is in a state where the relevant performance and performance of the system under test is in a state where redundant links are frequently switched, this function can greatly improve the test efficiency and reduce the difficulty of the test.

The redundant link tester mode of Ethertone WT2100 can meet the requirements for high-efficiency link on-off testing in redundant link systems and the need for accurate measurement of changing time between primary and backup links, greatly improving the development and debugging efficiency of R&D personnel, and providing effective support for optimizing the automatic changing time of primary and backup links.

In addition to redundant link tester mode, Ethertone WT2100 also has multi-functional modes such as network traffic generator mode, Ethernet impairment emulator mode, Network Traffic Generator + impairment emulator Integrating mode, etc., and functional modes can be switched flexibly and quickly.With the success of Ethertone, it become the multi-functional testers having the functions of Network Traffic Generator, Impairment Emulator,and redundant link tester and so on.

Related Products: WT2100