There are two types of SRUs, namely, SRUA and SRUB. The SRUA is divided into two types:
LE02SRUA and LE03SRUA. The SRUB has only one type, that is, LE02SRUB. Table 5-7 lists
the types of the SRU.
Table 5-7 Lists of SRUs
Name Switching Capacity Support Time and Clock
Synchronization
LE02SRUA 512 Gbit/s, bidirectional No
LE03SRUA 512 Gbit/s, bidirectional Yes
LE02SRUB 1 Tbit/s, bidirectional Yes
5.2.2 Function and Application
Function Description
The SRU integrates the control and switching functions and provides the control plane,
management plane, and switching plane.
l The control plane has such functions as protocol processing, service processing, route
calculation, forwarding control, service scheduling, traffic statistics, and system security.
l The management plane is responsible for system monitoring, environment monitoring, log
and alarm processing, system loading, and system upgrade.
l The switching plane provides high-speed and non-blocking data channels to implement
service switching between service modules. The S9300 supports double SRUs in 1:1
backup mode with the data switching units working in either 1+1 load balancing mode or
1:1 backup mode. The SRU can be equipped with a Flexible Service Unit (FSU). The SRU
provides 4 x 10G interfaces to FSU.
Based on the functions, the SRU consists of the following modules physically:
l Control module: functions as the control and management plane for the SRU and the entire
system, implementing protocol processing, route calculation, forwarding control, system
management, and system security.
l Switching module: functions as the service switching plane, providing high-speed service
channels to implement service switching.
l Local clock module: provides the working clock for the chips of the control module,
switching module, and equipment management and monitoring module.
l Equipment management and monitoring module: provides the controller area network bus
(CANBUS) module to monitor the SRU and manage the CANbus modules on the LPUs.
l Power supply: provides power supply for the SRU, FSU, and clock pinch board.
l FSU: provides enhanced services such as centralized forwarding, network quality analysis
(NQA), Ethernet operation, administration and maintenance (OAM), and NetFlow. It is an
optional value-added service module.
l Clock pinch board: provides the stratum-3 clock and synchronization Ethernet clock and
supports IEEE 1588v2. It is an optional clock module.
5 Boards
Quidway S9300 Terabit Routing Switch
Hardware Description
5-14 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 01 (2010-12-15)
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