Figure 2-1
Logical architecture
CLK
PIC
Uplink board
SFU
PIC
Downlink
board
CLK
System bus
Master MPU
Slave MPU
Data flow
Data flow
System bus
Data plane
Control and
monitoring planes
Inter-board communication
Uplink
Downlink
Physical Architecture
The physical architectures of the data, control, and monitoring planes on a router are as follows:
l
The data plane's forwarding function is implemented by the uplink and downlink line
processing units (LPUs) and a switch fabric unit (SFU) on the router.
l
Control and monitoring plane functions are implemented by control units on the main
processing units (MPUs) and LPUs.
For information about the mapping between the physical and logical architectures, see section
"Product Overview" in
HUAWEI CX600 Metro Services Platform Hardware Description -
Product Overview
.
2.2 Signal Flow on the Control Plane
The control plane, functioning as the nerve center, integrates control and management functions
and uses buses to control system units.
The control plane consists of control units on MPUs and those on other boards. Each MPU is
comprised of the following three functional units:
l
System management and control unit and system clock unit: work on the control plane.
l
System maintenance unit: works on the monitoring plane. For more information, see section
"Signal Flow on the Monitoring Plane" in this document.
MPU units and board units communicate through system buses and the SFU.
Signal Flow on the Control Plane
illustrates the principles of signal flow transmission on the control plane.
HUAWEI CX600-8/16/X3/X8/X16 Metro Service Platform
Hardware Description
2 Product Signal Flow Overview
Issue 03 (2013-11-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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