Kontron AT8242 - Manual (Page 44)

28 AT8242
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The reliability of the AdvancedTCA IPMB-0 is increased by using two IPMBs, with the two IPMBs referenced as
IPMB-A and IPMB-B. The aggregation of the two IPMBs is IPMB-0. The IPM Controllers aggregate the
information received on both IPMBs. An IPM Controller that has a message ready for transmit uses the IPMBs
in a round robin fashion. An IPM Controller tries to alternate the transmission of messages between IPMB-A
and IPMB-B.
If an IPM Controller is unable to transmit on the desired IPMB then it tries to send the message on the
alternate IPMB. By using this approach, an IPMB can become unavailable and then available without the IPM
Controller needing to take specific action.
4.2.2.2 IPMC - System Manager Interface
The Section 24 of [IPMI 2.0] describes how IPMI messages can be sent to and from the IPMC encapsulated in
RMCP (Remote Management Control Protocol) packets datagrams. This capability is also referred to as “IPMI
over LAN” (IOL). IPMI also defines the associated LAN-specific configuration interfaces for setting
parameters such as IP addresses and other options, as well as commands for discovering IPMI-based systems.
The Distributed Management Task Force (DMTF) specifies the RMCP format. This LAN communication path
makes the Front Blade Unit reachable to the System Manager for any management action (IPMC firmware
upgrade, query of all FRU Data, CPU reset etc.) without the need to go through the ShMC.
4.2.2.3 IPMC - System Event Log
The Kontron IPMC implementation includes a Local System Event Log device as specified in the Section 31 of
[IPMI 2.0]. The local System Event Log is a non-volatile repository for the front board and all managed FRU
events (Virtual AMC/RTM). The local SEL provides space for more than 5000 entries. However, even if blade
events are logged into the local SEL, the IPMI platform event messages are still generated by the IPMC's
Event Generator and sent to the centralized SEL hosted by the Shelf Manager through the IPMB-0
communication path - [PICMG 3.0] chapter 3.5; [IPMI 2.0] Section 29. Local SEL is useful for maintenance
purposes and provides access to the events when the FRU is extracted from the Shelf.
4.2.3 Web Management Interface
4.2.3.1 Connecting to the Web Management Interface
To have access to the Web Management Interface, at least one of the IPMC LAN channels must be configured
and accessible over the Base interface. Refer to section “Commands to configure IPMI over LAN” in the
AT8242 CLI Reference Manual for more details.
To access the Web Management Interface:
- From a remote system, open a web browser.
- Type the IP address of the management controller in the browser.
- Default username and password are admin / admin