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Operation
The 9E423-36 module is a 37-port device. Three front panel RJ-21 Telco connectors
support 36 10BASE-T ports, each port being a separate collision domain with the
37th port connecting to INB-2.
As shown in Table 3-1, Ethernet Network Interface Blocks (ENIBs) convert data
packets received from any of the 10BASE-T ports into a canonical frame format
before forwarding to the SmartSwitch ASIC, while the Internal Network Bus
Network Interface Block (INB NIB) converts data packets received from the INB
into a canonical format before forwarding to the SmartSwitch ASIC.
36
Ethernet
Ports
i960
Processor
Smart
Switch
ASIC
Figure 3-1. Packet Flow
Chapter 3
Diagnostic
Controller
DC/DC
Convertor
INB
NIB
I
N
B
3-1
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