Data Sheet

System Manageability—Ethernet Controller I210
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10.3.7.2.1 Ports Owned by the MC
A small subset of the TCP and UDP ports is dedicated to the out-of-band management controller. The
remaining ports are assigned to the host operating system. Hence, port-based filtering - and
commands to configure it - is required. For example, port-based filtering would be used to route WS-
Management packets to the out-of-band management controller.
A Network Controller needs to know the ports owned by a Management Controller in order to deliver
packets to it. A Management Controller uses the Set Port command to communicate its ports to a
Network Controller. The Set Port command is defined in Section 10.6.3.14.3. The I210 supports 10 port
filters.
The Set Binding (Section 10.6.3.14.10) command is used to define the combination of MAC, VLAN, IP
and ports that should be met to forward packets to the MC.
10.3.7.2.2 Sharing Network Infrastructure Packets
In addition to management traffic, the management controller needs to monitor network infrastructure
traffic along with the host. For each flow it is possible to define if it should include host traffic only, both
host and network or only network.
10.3.7.2.3 ARP Filters Enhancement
ARP request message filtering is controlled by the Enable Broadcast Filter command. However, as
currently defined, this command causes either all or no ARP requests to go to the Management
Controller. For MCTP over SMBus, attempting to forward all ARP requests within a subnet to the
Management Controller can easily overwhelm the available bandwidth. Therefore, an option to have the
Network Controller forward only ARP requests that contain a Target IP Address value that matches the
IP address used by the Management Controller. An amendment to Enable Broadcast Filter is defined
below to address this requirement.
10.4 OS-to-MC Traffic
10.4.1 Overview
Traditionally, the communication between a Host and the local MC is not handled through the network
interface and requires a dedicated interface such as an IPMI KCS interface. The I210 allows the Host
and the local MC communication via the regular pass-through interface, and thus allow management of
a local console using the same interface used to manage any MC in the network.
When this flow is used, the Host will send packets to the MC through the network interface. The I210
will examine these packets and it will then decide if they should be forwarded to the MC. On the inverse
path, when the MC sends a packet on the pass-through interface, the I210 will check if it should be
forwarded to the network, the Host, or both. Figure 10-2 describes the flow for OS-to-MC traffic for the
NC-SI over RMII case. OS2BMC is available also when working over MCTP. It is not available in legacy
SMBus mode.
The OS-to-MC flow can be enabled using the OS2BMC enable field for the relevant port in the OS 2 MC
configuration structure of the Flash.