Technical Product Specification

Platform Management Functional Overview Intel
®
Server Board S2600WP TPS
8. These sessions are not counted as IPMI sessions. (For example, Get Session Info only returns values based
on IPMI Sessions).
9. This type of Non-IPMI session can open IPMI sessions as part of a normal operation and those IPMI sessions
are counted as IPMI sessions. For example, within a Web Session, one or more IPMI Over LAN Session are
opened to GetandSet IPMI parameters. But since these IPMI sessions are not over LAN1 or Intel
®
Dedicated
Server Management NIC, they are not counted as LAN1 or Intel
®
Dedicated Server Management NIC IPMI
channel sessions but are counted as IPMI sessions in limit calculations.
10. It is an IPMI Over LAN RMCP+ session and is included in counts as part of the larger IPMI Over LAN group.
Note: The number of possible active session values returned by Get Session Info is the total
number of allocated memory session slots in BMC firmware for IPMI Sessions. The actual
number of IPMI sessions that can be established at any time is dependent on Channel and User
IPMI configuration parameters and in compliance with the IPMI Specification, which is always
less than the total available slots.
4.6.4
BMC LAN Channels
The BMC supports three RMII/RGMII ports that can be used for communicating with Ethernet
devices. Two ports are used for communication with the on-board NICs and one is used for
communication with an Ethernet PHY located on an optional add-in card (or equivalent
on-board circuitry).
4.6.4.1
Baseboard NICs
The specific Ethernet controller (NIC) used on a server is platform-specific but all baseboard
device options provide support for an NC-SI manageability interface. This provides a sideband
high-speed connection for manageability traffic to the BMC while still allowing for a
simultaneous host access to the OS if desired.
The Network Controller Sideband Interface (NC-SI) is a DMTF industry standard protocol for the
side band management LAN interface. This protocol provides a fast multi-drop interface for
management traffic.
The baseboard NIC(s) are connected to a single BMC RMII/RGMII port that is configured for
RMII operation. The NC-SI protocol is used for this connection and provides a 100 Mb/s full-
duplex multi-drop interface which allows multiple NICs to be connected to the BMC. The
physical layer is based upon RMII, however RMII is a point-to-point bus whereas NC-SI allows 1
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 through a BIOS setup option.
4.6.4.2
Dedicated Management Channel
An additional LAN channel dedicated to BMC usage and not available to host SW is supported
through 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.
Intel order number G44057-007 Revision 1.6
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