Quidway® NetEngine 40 Series Universal Switching Router Line Processing Units
Copyright ©2007 Huawei Technologies Co., Ltd. All rights reserved.
http://www.huawei.com/products/datacomm/
1
Quidway® NetEngine 40 Series Universal
Switching Router Line Processing Units
Overview
The Quidway® NetEngine 40 universal switching router (USR) series (abbreviated as NE40) is
based on distributed hardware forwarding structure. In addition to route switching unit (SRU), it
provides multiple types of line processing units (LPU).
UR-LPUF
The LPU is composed of LPU module and physical interface card (PIC). It aims at fast
processing and forwarding of services and maintenance of link protocols and service
forwarding tables.
Functions of modules are described as follows:
I. LPU
z
Encapsulate and process protocols used at the link layer (such as Ethernet II
and PPP).
z
Classify and filter data packets to monitor user flow and access control list.
z
Manage and schedule data buffering.
z
Forward data according to the forwarding table.
z
Identify and send packets over control protocols to the primary CPU for
processing through non-line rate interface.
II. PIC
The PIC deals with the physical part of functions of a service interface, including
O/E conversion and processing at the physical layer. For details, refer to an
introduction of each interface board.
