What is the Maximum Transmission Distance Supported by InfiniBand Cables Without Affecting the Transmission Bandwidth Latency?

The transmission distance of the InfiniBand cable depends on the type, rate, and quality of the cable.
John Doe

John Doe

Answered on 9:40 am

The transmission distance of the InfiniBand cable depends on the type, rate, and quality of the cable.

According to the IBTA standard, the maximum transmission distance of InfiniBand cables is shown in the following table:

Rate

Copper Cable

Fiber Optic Cable

SDR (10 Gb/s)

15m

300m

DDR (20 Gb/s)

10m

300m

QDR (40 Gb/s)

7m

300m

FDR (56 Gb/s)

5m

300m

EDR (100 Gb/s)

3m

100m

HDR (200 Gb/s)

3m

100m

NDR (400 Gb/s)

2m

 100m

It can be seen that the maximum transmission distance of copper cables decreases with the increase of the rate, while the maximum transmission distance of fiber optic cables is relatively stable.

However, these data are only theoretical limit values, and factors such as the quality of the cable, the loss of the connector, and the temperature and humidity of the environment must also be considered.

Therefore, when choosing InfiniBand cables, you need to consider the performance and cost of the cables according to the actual network needs and conditions.

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