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I2C error on VDX-8770 and Management Module (MM) fails

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TitleI2C error on VDX-8770 and Management Module (MM) fails
Symptoms
  • MM I2C bus unresponsive 
  • Management card offline and not accessible
  • Error Message
    2019/08/14-07:25:37:979387, [EM-1029], 48/7, M2 | Active, WARNING, VDX8770-4, M1, a problem occurred accessing a device on the I2C bus (-4). Operational status (1) not changed, access is being retried.,
Environment
  • BR-VDX8770
  • Management Module card
  • NOS  7.2.0c 
Cause
Loss of communication to the MM (Management Module) on the I2C bus. 

 
Resolution
  1. Try to re-insert Faulty MM1 
  2. If possible try to swap MM1 and MM2 to prove slot 
  3.  If the fault remains with MM1 contact GTAC
Additional notes

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