What are the Functions and Features of Main Control Card EH1D2SRUC000 on Huawei S9700 Switch?

Main Control Card EH1D2SRUC000 integrates control and switching functions and provides the control plane, management plane, and data plane, which are described as follows:

• The control plane is responsible for protocol processing, service processing, route computing, forwarding control, service scheduling, traffic statistics collection, and system security.
• The management plane is responsible for system status monitoring, environment monitoring, log and alarm processing, system software loading, and system upgrades.
• The data plane provides high-speed, non-blocking data channels to implement service switching between service modules.

The EH1D2SRUC000 consists of the following modules:

• Control module: provides the control and management plane for the EH1D2SRUC000 and the entire system, implementing protocol processing, route computing, forwarding control, system management, and system security.
• Switching module: provides the data plane and high-speed service channels for service switching.
• Local clock module: provides working clock for chips of the control module, switching module, and device management and monitoring module.
• Device management and monitoring module: provides a controller area network bus (CAN Bus) module to monitor the EH1D2SRUC000 and manage the CAN Bus modules of LPUs.
• Power supply module: provides power for the EH1D2SRUC000.
• Apply to Huawei S9706/S9712 Switch

Table 1 describes the functions and features of the EH1D2SRUC000.

Table 1 Functions and features of the EH1D2SRUC000

Function and Feature	Description
Basic functions	The EH1D2SRUC000 is the system control and management unit for the S9712 and S9706. It integrates the main control unit, clock unit, switching unit, and system maintenance unit.
Distributed forwarding	Performs concurrent data forwarding using a distributed data plane.
CF card	512 MB by default, expandable to 1 GB or 2 GB By default, the system configuration data, startup files, system software package, and system logs are saved to the CF card.
CSS	The EH1D2SRUC000 can have EH1D2VS08000 installed to provide the CSS service.
Clock	The EH1D2SRUC000 can have LE0D00CKMA00 installed to provide stratum-3 clock, synchronous Ethernet functions.
Redundancy backup	Supported Main control board is mandatory for switches. Each switch must be configured with one or two main control boards. When one main control board is configured for a switch, the main control board can be installed in either main control board slot of the switch. When two main control boards are configured, the two main control boards work in hot standby mode to improve reliability of the switch. The active and standby main control boards monitor the status of each other. If the active main control board fails, the standby main control board automatically becomes active to ensure uninterrupted services.
Hot swap	The EH1D2SRUC000 is hot swappable. Before removing the active EH1D2SRUC000 card, perform an active/standby switchover.