Description

Customer has alarms related to FAN tray and PEM. wanted to know if it's a hardware issue.

 

 

Symptoms

show chassis alarms no-forwarding

 

6 alarms currently active

Alarm time        Class Description

2023-09-07 11:32:35 EDT Major Fan Tray 3 I2C Access Error

2023-09-07 11:32:31 EDT Major Fan Tray 2 I2C Access Error

2023-09-07 11:32:29 EDT Major Fan Tray 1 I2C Access Error

2023-09-07 11:32:25 EDT Major Fan Tray 0 I2C Access Error

2023-09-07 11:29:26 EDT Major PEM 0 I2C Failure

2023-09-07 11:27:52 EDT Major PEM 1 I2C Failure

Solution

On TVP platforms, If there is an I2C failure, the I2C controller will be trapped in an error condition. All I2C access will fail after that failure. Alarms will be generated for I2C failure.

 

Temporary workaround --rebooting box.

 

Permanent fix:

Fix based on code for avoiding this anomaly in behavior to report inconsistent alarm failure  junos:21.4R3-S5 junos:22.1R3-S4 junos:22.2R3-S2 junos:22.3R3-S1 junos:22.4R1 junos:23.1R1 

Modification History

Moving to non-validated state