Enterasys Networks 9E312-12 manual System Management Buses, System Diagnostic Controller

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INB NIB

INB NIB

Each module that attaches to the Internal Network Bus (INB ) has an INB Network Interface Block (NIB). The INB NIB converts canonical frames to fixed length data blocks for transmission onto the INB. For data blocks received from the INB, the INB NIB reassembles the data blocks received from the INB back into canonical frames for transmission to the Fast Packet Switch (FPS) then from the FPS to the front panel ports.

System Management Buses

There are two management channels within the MMAC-Plus system: the SMB-1 and the SMB-10. These buses provide out-of-band management and inter-module management communication.

SMB-1 Bus

The SMB-1 is a 1Mbs management bus located within the MMAC-Plus. This bus is utilized by all diagnostic controllers in the system including connectivity modules, power supply modules and the environmental module. The SMB-1 transports inter-chassis information between system components, such as power and environmental information, as well as diagnostic messages. Periodic loop-back tests are performed by all modules which share this bus to ensure the validity of SMB-1. In the event a failure is detected on SMB-1, the SMB-10 may be used as an alternate communication channel.

SMB-10 Bus

The SMB-10 is a 10Mbs management bus located within the MMAC-Plus. This bus is used for inter-chassis communication of modules as well as serving as an out-of-band management channel into the MMAC-Plus. The SMB-10 is externalized from the chassis via an optional Ethernet Port Interface Module (EPIM) located on the front of the Environmental Module. Through an EPIM connection, full SNMP management of the MMAC-Plus is available out-of-band from user data. Modules which share the SMB-10 bus periodically send out loop- back packets to ensure the validity of SMB-10. If a fault is detected on the SMB-10, the SMB-1 is used by the modules as an alternate communication channel.

System Diagnostic Controller

This diagnostic controller is composed of a Z-80 microprocessor and its supporting logic. The diagnostic controller is designed to control the power-up sequencing of modules, monitor the 9E312-12 input and output power parameters, keep watch over the main host processor, monitor the temperature,

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Contents MMAC-Plus9E312-12 Ethernet Switch Module User’s Guide Page Vcci Notice FCC NoticeDOC Notice Contents Contents Introduction Processor FeaturesINB 9E312-12 Module Getting Help Related ManualsInstalling the 9E312-12 Module Installing the 9E312-12 Module Pin PinoutsReset Switch User Accessible Components E312-12 Module DIP Switch location Setting the 9E312-12 Module DIP SwitchNVRAM-2 Front Panel Ports OperationI960 Host Fast Packet SwitchSystem Management Buses System Diagnostic ControllerINB Interface DC/DC ConverterSystem Status Lanview LEDsLED Color State Description Function of the INB Transmit LEDs are listed in Table Function of the Port Transmit LEDs are listed in Table Technical Specifications SpecificationsSafety ServicePhysical Environment
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