Cabletron Systems 9F120-08 - Manual (Page 21)

3-3
Operation
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 concentrator modules 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 independently 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 Environmental Module. The concentrator modules have been
designed so that in the event of a diagnostic controller fault, the concentrator
modules will continue to function.
DC/DC Converter
The DC/DC converter converts the 48 VDC on the system power bus to the
necessary operating voltages for its host network services module. The diagnostic
controller monitors and controls the operation of the DC/DC converter.
FNB Interface
SmartSwitch 9000 modules are designed with one of two attachment policies. One
allows dual attachment of a module to either FNB-1 or FNB-2; the second allows
dual attachment to both FNB-1 and FNB-2. The modules have dual attachment to
the FNB backplane, connecting to both FNB-1 and FNB-2. The module can insert
into the FNB or bypass it. These flexible configuration options make the
SmartSwitch 9000 ideal for networks designed to Bridge/Route multiple lower
speed LANs to FDDI and/or networks designed using an FDDI collapsed
backbone.
i960 Core
The i960 core provides the SNMP and SNMPv2 protocol stacks, as well as support
for industry standard MIBs. Additionally, Cabletron enterprise extension MIBs
are supported for each media type. Advanced management services, such as the
Distributed LAN Monitor, RMON, telnet and network address to MAC address
mapping, are also provided by the i960 core.