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Impairment overview of nutea-551 – Xtramus NuTEA-551 V1.2 User Manual

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1.4. Impairment Overview of NuTEA-551

NuTEA-551 can simulate different Ethernet traffic impairment situations, including:

CRC Error Packet

At the tail of a packet, it keeps a checksum value to verify the correctness of the packet when it is

received. If the checksum value is not correct that can verify the correctness of the packet, we call it CRC

Error Packet.

Packet Corruption

For some reason intentionally or unintentionally, the content of packet is modified, owing to poor

transmission or manual interference.

Drop Packet

Ethernet is a family of frame-based computer networking technologies. Frames are transmitted via

different devices and media. After the transmission via different media and devices, some of frames might

be lost. For layer 2 switching mode of OSI model, packet is the same as frame.

Packet Re-Order

All of frame/packet should be transmitted sequentially, and it is able to reunite to complete data at

destination device. If the frame/packet sent goes different routes, it might be possible that later packet

arriving destination earlier, so the sequence of packet is changed, owing to poor device or manual

interference.

Packet Duplication

Packet is transmitted one by one via network device. For some reason, the destination had received the

packet, however the sending side does not received the acknowledgement, so packet is resent and

duplicated packet is generated.

Packet Delay & Jitter

Delays may occur during packet/frame transmission in real world network environments. Also, these time

periods of data transmission delays may vary, and are usually referred as jitters.

For more information regarding how to configure these Ethernet traffic impairment situations, please refer

to 5.4. NuTEA-551 Parameter Settings.

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