Operation
3-2
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 test are preformed 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 which is
also 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. In the event a fault is detected on
the SMB-10, the SMB-1 can be used as an alternate communication channel by the
modules.
System Diagnostic Controller
This diagnostic controller is composed of a Z-80 microprocessor and it’s
supporting logic. The diagnostic controller is designed to control the power-up
sequencing of modules, monitor the 9F310-02 and 9F315-02 input and output
power parameters, keep watch over the main host processor, as well as monitor
the temperature and control the SMB LANVIEW diagnostic LED. Although the
diagnostic controller and the main host processor can operate independent of
each other if needed, they exchange information about each others status and
overall module condition. The information gathered by the diagnostic controller
is available to the network manager via local/remote management and the LCD
located on the environment module. The 9F310-02 and 9F315-02 have been
designed so that in the event of a diagnostic controller fault, the 9F310-02 and
9F315-02 will continue to function.
Summary of Contents for MMAC-Plus 9F310-02
Page 1: ...MMAC Plus 9F310 02 9F315 02 FDDI Switch Module User s Guide ...
Page 2: ......
Page 8: ...Contents viii ...
Page 18: ...Installing the MMAC Plus modules 2 6 ...
Page 30: ...Specifications 5 4 ...
