Enib/fenib, Enib/fenib -2 – Cabletron Systems 9H423-28 User Manual

Page 26

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Operation

3-2

Figure 3-1. Packet Flow for the 9H423-28

ENIB/FENIB

The Ethernet Network Interface Block (ENIB) and Fast Ethernet (FENIB) convert
Ethernet data packets received through front panel ports into a common
canonical format that allows the SmartSwitch ASIC Engine to determine the
proper destination port. The ENIB/FENIB also convert data packets from the
common canonical format back to Ethernet data packets for transmission out
front panel ports.

i960
Processor

Smart
Switch
ASIC

I
N
B

INB
NIB

SMB 1

SMB 10

DC/DC
Converter

Diagnostic
Controller

ENIB

FENIB