Hardware Information of Huawei S5700 Series Ethernet Switches

Hardware modules of Huawei S5700 refer to the interface card, SCU (Switch Control Unit), power
supply, and fan.

Logical structure of hardware modules

SCU
The SCU is fixed on the S5700 like S5700-28C-EI-24S. Each S5700 has one SCU.
The SCU is responsible for packet switching and device management. It integrates multiple
functional modules, namely, the main control module, switching module, and interface
module.
Main Control Module
The main control module implements the following functions:
Processing protocols
Functioning as an agent of the user to manage the system and monitor the system
performance according to instructions of the user, and report the running status of the
device to the user
Monitoring and maintaining the interface module and switching module on the SCU
Switching Module
The switching module, also called the switching fabric, is responsible for packet exchange,
multicast replication, QoS scheduling, and access control on the interface module of the SCU.
The switching module adopts high performance chips to implement line-speed forwarding and
fast switching of data with different priorities.
Interface Module
The interface module provides Ethernet interfaces for accessing Ethernet services.
Cards
The S5700 supports service and stack cards. Service cards allow flexible networking and
provide cost-effective and customized solutions. Stack cards connect multiple switches into
one logical switch, which implements on-demand expansion, reduces investments, simplifies
management, and improves network reliability.