Cmb Connection; Service Port Management - Bay Networks 5380 User Manual

CMB Connection

The management section of the backplane is the common management bus
(CMB), a high-speed, multimaster, shared-memory communication channel that
connects all modules installed in the hub to one another and to the supervisory
module. The modules installed in the hub use the CMB to acquire and distribute
configuration, status, and traffic information.
The supervisory module is an intelligent interface between the Model 5000
chassis and user-installed modules. The supervisory module provides the
following services to other modules across the CMB:
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•
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The supervisory module also supports configuration terminal connection through
the service port on the front panel of the chassis.

Service Port Management

The service port, located on the front panel of the chassis, provides a switched
serial communication link between the service port and any module in the hub,
including the supervisory module. By connecting a terminal to this port, you can
access the Technician Interface to change the configuration parameter values for
the routers installed in the hub.
For more information about using the service port, see Chapter 3, "Initializing and
Setting Up the Routers."
112768 Rev. B
Maintains chassis component information and environmental status
Stores the primary module configurations
Restores the module configuration after the module power is cycled or the
module is reset
Overview of Model 5380 and Model 5580 Routers
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