1.2.7 Control Plane
This section describes the functions and features of the control plane.
USG9560 uses the SRU (E8KE-X8-SRUA-200) to implement the control plane functions. For
details about the SRU, see
. The functions of the SRU are
described from the aspects of system control and management, system maintenance, and
reliability.
System Control and Management Unit
As the system control and management unit, the SRU provides the following functions on the
system control panel:
l
Route calculation: All routing protocol packets are sent by the forwarding engine to the
SRU for processing. In addition, the SRU broadcasts and filters packets, and downloads
routing policies from the policy server.
l
Outband communication between boards: The LAN switch modules integrated on the
SRU provide outband communications for the SFUs, LPUs and SPUs. In this manner,
messages can be controlled, maintained, and exchanged between the boards.
l
Device management and maintenance: Devices can be managed and maintained through
the management interfaces (serial interfaces) provided by the SRU.
l
Data configuration: The SRU stores configuration data, startup files, upgrade software,
and system logs.
l
Data storage: The SRU provides two interfaces for CF cards, which serve as mass
storage devices to store data files.
System Maintenance Unit
As the system maintenance unit, the SRU collects monitored information to test system units
locally or remotely, or implement in-service upgrading of system units.
The SRU periodically collects the operating data of system units through the Monitorbus. The
SRU generates related control information based on the collected information, such as the
detection of board installations and adjustments to fan speed. Through the joint test action
group (JTAG) bus, the SRU remotely or locally tests system units, or performs in-service
upgrading of system units.
Reliability
The main control modules, clock modules, and LAN switch modules on the SRU work in 1:1
hot backup mode, improving system reliability.
The two SRUs work in 1:1 backup mode. Each SRU monitors the status of the other. If the
active SRU is faulty, the standby SRU automatically takes over as the active SRU.
1.2.8 Technical Specifications
This section describes the dimensions, weight, power, and environment specifications of the
USG9560.
lists the technical specifications of the USG9560.
HUAWEI USG9500 Series
Hardware Guide
1 Hardware Overview
Issue 03 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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