Gigabit Switch Router Installation and Configuration Guide

Product Overview 1-61
Overview of the Cisco 12008
Figure 1-18 Block Diagram of the OC-12c/STM-4c POS Line Card
Input
interface
Packet
receive
(Rx)
Burst
buffer
Burst
buffer
Switch
fabric
interface
Forwarding
processor
L3 switching
accelerator
Switch
fabric
Output
interface
Packet
transmit
(Tx)
MBus
module
MBus
interface
Buffer
memory
H11725
Silicon
queuing
engine
Buffer
memory
Silicon
queuing
engine