Data Sheet

Ethernet Controller I210 —Flash Map
240
6.8.8 Alternate MAC Address Pointer (Word 0x37)
This word can point to a location in the Flash containing additional MAC addresses used by system
management functions. If the additional MAC addresses are not supported, the word must be set to
0xFFFF. The structure of the alternate MAC address block can be found in Table 6-9.
6.8.9 Checksum Word (Word 0x3F)
The checksum words (Offset 0x3F from start of the Common, LAN 1, LAN 2 and LAN 3 sections) are
used to ensure that the base Flash image is a valid image. The value of this word should be calculated
such that after adding all the words (0x00:0x3F), including the checksum word itself, the sum should
be 0xBABA. The initial value in the 16-bit summing register should be 0x0000 and the carry bit should
be ignored after each addition.
Notes: Hardware does not calculate the checksum word during Flash write; it must be calculated by
software independently and included in the Flash write data. Hardware does not compute a
checksum over words 0x00:0x3F during Flash reads in order to determine validity of the
Flash image; this field is provided strictly for software verification of Flash validity. All
hardware configurations based on word 0x00:0x3F content is based on the validity of the
Signature field of the Flash Sizing & Protected Fields Flash word (Signature must be 01b).
However, firmware is required to recompute and update the checksum word whenever it
restores the MAC address. Refer to Section 4.5.11.
6.8.10 Image Unique ID (Words 0x42, 0x43)
These words contain a unique 32-bit ID for each image generated by Intel to enable tracking of images
and comparison to the original image if testing a customer Flash iNVM image.
6.8.11 mDNS Records Area Offset (Word 0x25)
This word contains the offset to the Flash area provisioned for the storage of the mDNS records.
CHAP User Name 0x2CF:0x250 127 + 1
The user name must be non-null value and maximum size of user name
allowed is 127 characters.
Vlan ID 0x2D1:0x2D0 2
Vlan Id to be used for iSCSI boot traffic. a valid Vlan ID is between 1
and 4094
Mutual CHAP Password 0x2E3:0x2D2 16 + 2
The minimum mutual CHAP secret must be 12 octets and maximum
CHAP secret size is 16. 1 byte is reserved for alignment padding and 1
byte for null.
Reserved 0x323:0x2E4 64 Reserved for FCoE - not relevant in the I210 - should be set to zero.
Reserved 0x383:0x324 96 Reserved for future use, should be set to zero.
Table 6-9. Alternate MAC Address Block
Word Offset Description
1
1. An alternate MAC Address value of 0xFFFF-FFFF-FFFF means that no alternate MAC address is present for the port.
0x0...0x2 Alternate MAC Address for the LAN port
0x3...0xB Reserved
Configuration Item
Offset
(Bytes)
Size in
Bytes
Comments