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

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Article ID: 14379 


Error log ('show support') contains one or more instances of "CI2CBus::Access() failed for slave 0x40" error; for example:
<163>Dec 13 09:37:35 NIM[2.tBcPoEAccs]doI2cAccess:
CI2CBus::Access() failed for slave 0x40 on NIM 1

Power over Ethernet (PoE) may not be working on a group of ports on the referenced module slot.

Given that module slots are identified in messages as "[<slot>.<task>]" and that "slave 0x40" refers to the PoE microcontroller , this particular message means that there is an I2C bus issue with the PoE microcontroller on a slot 2 module NIM. 

Ensure that the PoE power header (looks like four parallel pins) is installed so that the NIM's RJ45 ports can physically receive PoE power.
See the "S-Series Option Module Quick Reference" guide, for more about the power header. 

Contact the GTAC for assistance, as necessary. 

See also: 14197.
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Posted 4 years ago

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