Intel S2600IP Technical Product Specification page 82

Platform Management OverviewIntel® Server Board S2600IP and Intel® Workstation Board W2600CR TPS
master and up to 4 slaves. The logical layer (configuration commands) is incompatible with
RMII.
Multi-port baseboard NICs on some products will provide support for a dedicated management
channel than can be configured to be hidden from the host and only used by the BMC. This
mode of operation is configured by a BIOS setup option.
4.5.3.4.2 Dedicated Management Channel
An additional LAN channel dedicated to BMC usage and not available to host SW is supported
by an optional add-in card. There is only a PHY device present on the add-in card. The BMC
has a built-in MAC module that uses the RGMII interface to link with the card's PHY. Therefore,
for this dedicated management interface, the PHY and MAC are located in different devices.
The PHY on the card connects to the BMC's other RMII/RGMII interface (that is, the one that is
not connected to the baseboard NICs). This BMC port is configured for RGMII usage.
In addition to the use of an add-in card for a dedicated management channel, on systems that
support multiple Ethernet ports on the baseboard, the system BIOS provides a setup option to
allow one of these baseboard ports to be dedicated to the BMC for manageability purposes.
When this is enabled, that port is hidden from the OS.
4.5.3.4.3 Concurrent Server Management Use of Multiple Ethernet Controllers
Provided the HW supports a management link between the BMC and a NIC port, the BMC FW
supports concurrent OOB LAN management sessions for the following combination:

Two on-board NIC ports

One on-board NIC and the optional dedicated add-in management NIC.

Two on-board NICs and optional dedicated add-in management NIC.
All NIC ports must be on different subnets for the above concurrent usage models.
MAC addresses are assigned for management NICs from a pool of up to 3 MAC addresses
allocated specifically for manageability. The total number of MAC addresses in the pool is
dependent on the product HW constraints (for example,a board with 2 NIC ports available for
manageability would have a MAC allocation pool of 2 addresses).For these channels, support
can be enabled for IPMI-over-LAN and DHCP.
For security reasons, embedded LAN channels have the following default settings:
IP Address: Static
All users disabled
IPMI-enabled network interfaces may not be placed on the same subnet. This includes the
® Dedicated Server Management NIC and either of the BMC's embedded network
Intel
interfaces.
Host-BMC communication over the same physical LAN connection – also known as "loopback"
– is not supported. This includes "ping" operations.
On baseboards with more than two onboard NIC ports, only the first two ports can be used as
BMC LAN channels. The remaining ports have no BMC connectivity.
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Intel order number G34153-003
Revision 1.1