Intel S2600GZ S2600GZ/GL - Page 75

Platform Management Functional Overview Intel® Server Board S2600GZ/GL TPS Run-time determination of LAN channel capabilities can be determined by both standard IPMI defined mechanisms. 6.10.3.1 RMCP/ASF Messaging The BMC supports RMCP ping discovery in which the BMC responds with a pong message to an RMCP/ASF ping request. This is implemented per the Intelligent Platform Management Interface Specification Second Generation v2.0. 6.10.3.2 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 RMM4 add-in module. 6.10.3.2.1 Baseboard NICs The on-board Ethernet controller provides support for a Network Controller Sideband Interface (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 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 fullduplex 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. The server board will provide support for a dedicated management channel that can be configured to be hidden from the host and only used by the BMC. This mode of operation is configured from a BIOS setup option. 6.10.3.2.2 Dedicated Management Channel An additional LAN channel dedicated to BMC usage and not available to host SW is supported from an optional RMM4 add-in card. There is only a PHY device present on the RMM4 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 RMM4 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 RMM4 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. 6.10.3.2.3 Concurrent Server Management Use of Multiple Ethernet Controllers The BMC FW supports concurrent OOB LAN management sessions for the following 62 Revision 1.1 Intel order number G24881-004