How to check if I2C bus is jammed on the QFX3500

This article shows how to check and solve I2C bus issues on the QFX3500.

1.Use the diag tool located in /usr/sbin/diag_tools:

2.Check the I2C bus and enable verbose with the command:

3. Run the test:

As you can see, this QFX3500 passed the i2c bus test. However, if we get an output similar to the following, the perform the instructions in the solution below.

Reboot will solve the issue. If not, an RMA is required.

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James Palmer

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