Further checking, you may refer to below documentation for reference:
And in reference the FAQ http://www.intel.com/content/dam/www/public/us/en/documents/faqs/ethernet-controller-i210-i211-faq.pdf
Section 2.31 What are the I210 SMBus slave addresses?
The SMBus slave address is configured in the NVM. The 7-bit address in the images supplied by Intel is 0x49. For additional details, refer to the NVM settings in Section 126.96.36.199, “SMBus Slave Addresses — Offset 0x03” in the Intel® Ethernet Controller I210 Datasheet.
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As this is a design inquiry, you may also find useful information by accessing Resource & Design Center or Intel® Embedded Design Center below:
Hope the above information help.
Thank you for your detailed reply. I had been reading the I210 datasheet and FAQ prior to submitting this question, it's just difficult to sift through 900 pages in the time I have available.
When the I210 datasheet refers to "NVM", do they always mean "iNVM"? I took Section 2.31 to mean that an SPI Flash was necessary to change the default SMBus Address.
So following that, the answer to my original question about SMB Slave Address is "the SMB Slave Address can only be changed via SPI Flash, not the PCIe bus"?
Is that correct?
As this is a design inquiry, you may also find useful information by accessing Resource & Design Center or Intel® Embedded Design Center below for the support group to further assist you.