Error log ('show support') contains one or more instances of "CI2CBus::Access() failed for slave 0x40" error; for example:
Dec 13 09:37:35 10.19.98.17 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.