Data Sheet

System Manageability—Ethernet Controller I210
759
address of the MC are extracted from the Clear Initial State command parameters or any other NC-SI
command received later with a channel ID of the I210. Subsequent pass through traffic will be received
from or sent to this address only.
If the EID or the physical address of the NIC changes, it indicates the changes to bus owner so that the
routing tables can be updated. There is no attempt to directly send an indication to the MC about the
change.
See more details in next section.
10.7.2.2 Bus Transition
The following section defines the transition flow between PCIe and SMBus as the bus on which MCTP
flows. Figure 10-10 describes the flow to transition between PCIe and SMBus. The following parameters
are used to define the flow:
•NIC EID on PCie
•NIC EID on SMBus
• NIC PCIe Target ID
• Bus Owner EID on PCie
• Bus Owner EID on SMBus
• Bus Owner PCIe Target ID
• Bus Owner SMBus address
• MC EID on PCie
• MC EID on SMBus
• MC PCIe Target ID
• MC SMBus address
• NIC SMBus address
All these variables are initialized to zero at power on apart from the SMBus address of the endpoint
(NIC) which may be initialized from Flash value.