Huawei GGSN 9811 hardware and software

Revision Record
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Course Code Product Product Version Course Version ISSUE
OWD908102 GGSN V900R008C01 ISSUE1.01
Developer/Modifier Time Approver New/Update
Jiyuan 2010/12 Jiyuan update
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page0

GGSN9811 Hardware
and Software Overview
www.huawei.com
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.

References
HUAWEI GGSN9811 Hardware Description
HUAWEI GGSN9811 Hardware Installation

Objectives
Upon completion of this course, you will be able to:
Describe GGSN9811 hardware structure
Describe GGSN9811 software structure
Describe the board function
Describe the service flow

Contents
1. Background Knowledge of GGSN9811
2. System Structure of GGSN9811
3. Cable Connection of GGSN9811
4. Service Flow of GGSN9811

Contents
2. GGSN9811 Hardware and Software (NE40E Platform)

GGSN Location

Contents

Contents
2.1 System Structure of GGSN9811
2.2 Cable Connection of GGSN9811
2.3 Service Flow of GGSN9811

Contents
2.1.1 Hardware Introduction
2.1.2 Hardware Logical Structure
2.1.3 Software Logical Structure

Cabinet: N68E-22
1
3
4
5
2
6

Subrack(NE40E) Power distribution box (3 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
LAN Switch cabling frame (1 U)
High capacity fiber rack (1 U)
Filler panel (1 U)
1
2
9
Filler panel (1 U)
subrack ( 20 U)
3
4
5
8
7
6

Board Configuration(NE40E)
C
A
R
D
C
C
A
R
D
C
12
S
SPU-E SPU-E
1 5 6 7 8
0
S
R
U
11
S
F
U
9
S
R
U
2 3 4
L
P
U
1
L
P
U
C
A
R
D
C
C
A
R
D
C
A
R
D
C
A
R
D
C C C
SPU-E GGSN
A
R
D
A
R
D
Board Name Full Spelling
F
U
SRU Switching Route Unit
SPU Service Processing Unit
LPU Line Processing Unit
SFU Switching Fabric Unit
A
R
D
A
R
D
A
R
D
A
R
D

Board(NE40E)
Physical Board Function
SRU: Switching
Route Unit
The SRU controls and manages the system.
SFU: Switching
Fabric Unit
The SFU performs the switching function,
supports expeditious data exchange.
SPU: Service
Processing Unit
The SPU performs functions such as service
control, user packet forwarding, flow control,
quality of service (QoS), and packet inspection.
LPU: Line Processing
Unit
The LPU provides physical interfaces that
connect the GGSN9811 to NEs or external
networks

SRU Board(NE40E)
SRU
ETH 1
ETH 0 OFL
RUN
ALM
ACT
LINK ACTLINK ACT
SFU
MPU
AUX CONSOLE ACT
HD1: for BAM
HD2: for CDR
SRU

SFU Board
The SFU provides the switching
function.
There are 4 SFU in the GGSN9811:
two stand alone SFU boards and
two SFU modules in two SRU
boards.
These 4 SFU work in load share
mode.

SPU Board
The SPU board handle all the
service related functions.
Signalling: GTP, Radius, Diameter,
etc.
SPU
OFL
RUN
SPU
Routing and forwarding.
Security function.
..

LPU Board
The LPU processes
and forwards service
data. In addition, the
LPU maintains and
manages link
LPU
RUN LPU
OFL
RUN
1
0
OFL
1
0
11
10
13
12
LPU
OFL
RUN
0-0
LPU
OFL
RUN
protocols and
forwarding
information base (FIB)
tables.
11
10
23
22
24X10/100/1000Base-TX-RJ45
0-7
24X10/100/1000Base-SFP
FE(10M/100M) LPU GE(1000M) LPU

Power: Power Distribution Box
Power distribution box (3 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Filler panel (2 U)
Filler panel (1 U)
Front view
Filler panel (1 U)
Filler panel (1 U)
subrack ( 20 U)
Input
Output
Rear view

Power Supply Modules
1
2
NEG(-)
3
4
5
9
8
7
6
IN OUT FAIL
ON
OFF
RTN(+)
PGND
1
2
3
5
4
1. –48 V power 2. Power
ground
3. Protection
ground
4. Power
switch
5. Handle

Contents

Hardware Architecture

Internal Connection
The GGSN9811 subrack contains two types of data
exchange planes:
Ethernet management
For operation and maintenance
Service data exchange planes
For service

Ethernet Management Planes
The GGSN9811 subrack consists of two Ethernet
management planes: plane A and plane B. The two
planes form the dual star topology. The bandwidth
between a management plane and a service board is 100
Mbit/s.

Service Data Exchange Planes
The two SFU modules embedded in the two SRUs form
four exchange planes with the two SFUs.

Power Supply Monitoring
The power supply monitoring module can monitor the
power distribution box (PDB) and power supplies of the
subrack.
The subrack internal power supply module is monitored by
the SRU.
PDB monitoring

Fan Monitoring
The GGSN9811 subrack is equipped with a fan box on
the top. The fan box consists of nine fans and one fan
monitoring module. The fan monitoring module is used
to monitor the running status of fans and control the fan
speed.

Contents

Logical Structure
The logical structure of
GGSN9811 as follow:
AM（Access Management）
SM（Service Management）
CM（Charging Management）
OM
AM
CM
LMT
PS（Platform Service）
OM（Operation and Maintenance）
LMT（Local Maintenance Terminal） PS
SM

OM System
The OM system is the management center of the
GGSN9811

Platform Service System

Access Management System

Service Management System

Charging Management System

Contents

Contents
2.2.1 Console Cable Connection
2.2.2 Service Cable Connection

Console Cable Connection
RTN(+)
NEG(-)
COM1
COM2
A
10 9 8 7 6 5 4 3 2 1
B
10 9 8 7 6 5 4 3 2 1
RTN(+)
NEG(-)
Power Distribution Box
1 2
8
1
X1 X2
1
8
Subrack
SRU SRU
Monitor Serial Cable
for the Power
Distribution Box

Contents
2.2.1 Console Cable Connection
2.2.2 Service Cable Connection

Ethernet Cable Connection

Contents

GGSN Main Processing Procedure
1. Create PDP Context Req
SRU
Route
distribute
4.Create user
connection
Route
distribute
Buffer CDR
LPU SPU
2. User
authentication
Radius
Server
3. Address allocation
Radius/
DHCP/SPU
LPU
5. Create PDP Context Rsp
IP Addr
Gn uplink PDU
Forward
Gi uplink PDU
Gn downlinkPDU Gi downlink PDU
Uplink GTP tunnel
decapsulation
Downlink GTP tunnel
encapsulation
Generate original
CDR
SSFFUU mmoodduullee iiss BBeettwweeeenn
eevveerryy ttwwoo bbooaarrddss

Flow Looking on Boards
Uplink Data flow
SGSN GTP tunnel LPU SPU LPU PDN
Downlink Data flow:
LPU SPU LPU GTP tunnel
PDN SGSN
Uplink Data flow with Gi IPSec/GRE tunnel:
SP
U
GTP tunnel LP
U
Downlink Data flow with Gi IPSec/GRE tunnel:
IPSec/GRE
tunnel
SP
U
LP GTP tunnel
U
LP
U
IPSec/GRE
tunnel
LP
U
SGSN PDN
PDN SGSN

OAM Flow
L
P
U
S
L
P
U
S
SFU
SRU
P
U
P
U
LMT PC

GGSN9811 Cabinet(NE80E)
1. LCD module
2. Fan subrack
4. boards area
8. Power module

GGSN9811 Board (NE80E)
Board Name Full Spelling
MPU Main Processing Unit
SPU Service Processing Unit
LPU Line Processing Unit
SFU Switching Fabric Unit

MPU Board
SRU
ETH 1
ETH 0 OFL
RUN
ALM
ACT
LINK ACTLINK ACT
MPU
HD1: for BAM
AUX CONSOLE ACT
HD2: for CDR
MPU

Summary
The GGSN9811 has SRU, SFU, SPU and LPU board.
SRU: OAM and routing management.
SFU: switching.
SPU: service handling.
LPU: physical interface.

Huawei GGSN 9811 hardware and software

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