K-Series with "doI2cAccess: CI2CBus::Access() failed for slave 0x40" errors

  • 0
  • 1
  • Article
  • Updated 5 years ago
  • (Edited)
Article ID: 14197 


Error log ('show support') contains one or more instances of "CI2CBus::Access() failed for slave 0x40" error; for example:
Sep 25 23:33:06 NIM[11.tBcPoEAccs]doI2cAccess:
CI2CBus::Access() failed for slave 0x40 on NIM 3#015

Power over Ethernet (PoE) may not be working on a group of ports on the referenced line card slot (NIM# + 1). 

Given that "slave 0x40" refers to the PoE microcontroller and that line card slots 1-9 are identified in messages as "NIM 0" through "NIM 8", this particular message means that there is an I2C bus issue with the PoE microcontroller on the slot 4 line card. 

Upgrade to firmware or higher.
Release notes state, in the 'Problems Corrected in' section:
When multiple PoE capable line cards are reset at the same time, messages similar to: "<3>System*11+PoE controller on Line Card 9 is not accessible." and "<3>NIM*11.tBcPoEAccs+doI2cAccess: CI2CBus::Access() failed for slave 0x40 on NIM 8" might be displayed. These messages are the result of PoE initialization and do not reflect loss of power on a working line card.

If the symptom persists after upgrade, please contact the GTAC for assistance.
Photo of FAQ User

FAQ User, Official Rep

  • 13,620 Points 10k badge 2x thumb

Posted 5 years ago

  • 0
  • 1

There are no replies.

This conversation is no longer open for comments or replies.