illustrates the principles of signal flow transmission on the monitoring plane.
Figure 2-4
Signal flow transmission on the monitoring plane
S
ys
te
m
b
ac
kp
la
ne
Master MPU
System
maintenance
unit
SFU
Slave MPU
System
maintenance
unit
Uplink unit
Monitor
unit
Monitor
unit
Downlink unit
Monitor
unit
Monitor
Control
Monitor
Control
Monitor
Control
Monitor
Control
Monitor
Control
The monitoring plane, like the control plane, supports bidirectional signal flows.
l
Board-to-MPU signal flow: implements monitoring. The system maintenance unit on each
MPU uses a MonitorBus to collect operating information on system units and generates
control information based on the unit-specific operating status.
l
MPU-to-board signal flow: implements control. An MPU delivers control information to
modules to monitor board information, such as the installation and operating status and fan
speed. The MPU also loads a bus to locally or remotely test or upgrade system units.
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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