Introducing the Network 9000 Routing Hub
1.4.1
10Base-T/10Base-FL (FOIRL) Fiber Concentrators
The 10Base-T concentrators come in three models. The model 201 has 24 ports on two 50 pin
Telco connectors, a management port and an AUI uplink. The model 202 is similar to the
model 201, but with the addition of an FOIRL fiber uplink. The model 203 has 20 ports using
RJ-45 connectors and a management port. The 10Base-FL concentrator has 12 fiber ports and
is FOIRL compliant.
Each of these concentrators consists of an I/O module, which can optionally be used in
conjunction with the Management Processor 210. The concentrator can connect to any of the
three midplane Ethernet LAN segments and also connects to the LMB. The concentrator does
not require a software load image or operational parameters. Its operating software and
characteristics are permanently stored on the I/O module. The concentrator determines which
midplane Ethernet LAN segment it will connect to by reading initialization parameters located
in the control storage. (You can configure which Ethernet LAN segment a concentrator will be
connected to from a Management Card or another product module in the Hub.) The
concentrator provides status and control information which can be obtained by other product
modules in the Hub.
1.4.2
Enhanced Management Card
The Management Processor 210 provides an IEEE 802.1k compliant SNMP agent for the
concentrator. With additional memory (user upgradable SIMMs) it can also provide a
command line interface using the management port on a concentrator I/O module, or through
a remote console mechanism (DEC RCP, Telnet, etc). When the model 210 is installed in the
processor module slot it will continuously read status information from the I/O module in the
same slot (a concentrator) and process this information for retrieval via SNMP or the user
interface. Further, the model 210 can be directed to control and acquire status information
from a concentrator in another slot. The model 210 loads a software image and operational
parameters as described in the System Features section. If a memory card is installed it can
load the software image and operational parameters from the memory card. It can also load
and store parameters for other products in the Network 9000 Hub.
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