information used to check availability of boards, control the running status of the switching
fabric, perform port switching, reset the forwarding engine, and increase the fan speed.
l Working as the proxy of the network management module: The MCUA can manage and
maintain the S9303 through the open management interfaces (serial interfaces or network
interfaces).
l Implementing data configuration: The MCUA stores the configuration data, startup file,
accounting data, upgrade software, and running logs of the S9303. The MCUA provides a
CF card to store data files.
l Working in 1:1 backup mode to improve reliability: The master and slave MCUAs monitor
the status of each other. When the master MCUA fails, the slave MCUA substitutes for the
master MCUA to ensure normal running of the system.
l Supporting the optional clock board: The LE03MCUA provides the stratum-3 clock and
Ethernet clock synchronization functions and supports IEEE 1588v2.
NOTE
The LE02MCUA does not support the clock module.
Application
The MCUAs of the S9303 are installed in slot 4 and slot 5.
The S9303 must have at least one MCUA. You can install one or two MCUAs. If only one
MCUA is installed, it can be installed in either of the MCUA slots. To improve reliability of a
key device, you can install double MCUAs. When the master MCUA fails, the slave MCUA
substitutes for the master MCUA automatically to prevent service interruption.
5.3.3 Panel
Figure 5-9 and Figure 5-10 show the appearances of the MCUA panels.
Figure 5-9 Appearance of the LE02MCUA panel
Figure 5-10 Appearance of the LE03MCUA panel
5 Boards
Quidway S9300 Terabit Routing Switch
Hardware Description
5-20 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 01 (2010-12-15)
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