Data Sheet

Ethernet Controller I210 —System Manageability
644
Figure 10-2. OS-to-MC Diagram
Note: This flow assumes that the MC does not share a MAC address with the Host.
The OS-to-MC flow is enabled only for ports enabled by the NC-SI “Enable Channel” command
or via the OS-to-MC Enable field for the relevant port in the OS-to-MC configuration structure
of the Flash.
OS2BMC traffic must comply with NC-SI specifications and is therefore limited to maximum
sized frames of 1536 bytes (in both directions).
10.4.2 Filtering
10.4.2.1 OS2BMC Filtering
When OS-to-MC traffic is enabled, the filters used for network to MC traffic are also used for OS-to-MC
traffic. Traffic considered as exclusive to the MC (Relevant bit in MNGONLY is set) is also considered as
exclusive to the MC when sent from the Host and not forwarded to the network.
10.4.2.2 Handling of OS-to-MC Packets
All the regular transmit offloads are available for OS-to-MC packets also.
Network
Controller
Port NPort 0
External
Network
NC-SI
Channel 0
NC-SI
Channel N
MC
MNG/host
mux
MNG/host
mux
Port 0
Driver
Port N
Driver
Networking stack
Aplication
...
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