Transcript Shared success

IP NETWORK
Prepared by IP O&M Section
Shared success
TOPICS
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Introduction
IP Network Layers and their Functions
IP Network Equipments
Broadband Access Technologies
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INTRODUCTION
What is IPNGN?
Multi-Service Network
Separated Planes
Open Interfaces
A packet Mode Technology
Guaranteed QoS
Supports generalized mobility
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INTRODUCTION Cont’d
Why NGN?
Fusion of services
Common network
IP in back bone
Split of different layers
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INTRODUCTION Cont’d
• Ethio telecom’s IP Network is constructed in such
a way that it can provide NGN (including GSM,
Fixed NGN, CDMA, IP/Broadband Access
Network services including Value Added Services)
at regional cities, major cities, sub cities, and
towns.
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IP NETWORK LAYERS & THEIR FUNCTIONS
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IP NETWORK LAYERS & THEIR FUNCTIONS Cont’d
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Gateway layer/ deployed in 4 sites
Backbone layer/ deployed in 5 sites
Core layer/deployed in 17 sites
Edge layer/deployed in 25 sites, and
CS Layer/ deployed in 84 sites (75 cities)
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GATEWAY LAYER
It contains Gateway Routers,
 Mainly functions to connect to an external
network /internet/
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GATEWAY LAYER Cont’d
OPGW upto Metema
DWDM upto Moyale
Internet
Internet
Shashemene
Gateway Site
Bahir Dar
Gateway Site
DWDM upto Dewele
Internet
Dire Dawa
Gateway Site
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GATEWAY LAYER Cont’d
 The Ethio Telecom has built extensively Ethiopia’s
internet infrastructure to give better and quality
internet service.
 Currently we have fifteen international internet links
from Bole, Bahirdar Diredawa and Shashemene
gateways
 The Total Upstream /downstream bandwidth is
6475.5/6775.5 in Mbps
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GATEWAY LAYER Cont’d
Int’l Link
Bandwidth
(Down/Up in
Mbps)
Int’l Link
Bandwidth
(Down/Up in
Mbps)
SEACOM1
622/622
Canar Tel 1
622/622
SEACOM2
622/622
Canar Tel 2
622/622
SEACOM3
622/622
Sudatel 1
622/622
SEACOM4
622/622
Sudatel 2
622/622
SEACOM5
622/622
BCS
622/622
Djibouti
155/155
EMS sat
155/45
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BACKBONE LAYER
 Totally 10 sets of BR (T8000), distributed to five
cities,
 Each city deploys two sets of BR, full-meshed
connection,
 This layer is mainly responsible for service traffic
forwarding and high capacity communication
facilities.
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BACKBONE LAYER Cont’d
Equipment Protection
Link Protection
SH
AA
DD
BD
MK
Addis Ababa
Bahir Dar
Shashemene
Mekele
Fully Meshed Horizontal Connectivity with vertical redundancy
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Dire Dawa
CORE LAYER
 This layer is mainly responsible for service
traffic forwarding, convergence and high
capacity communication facilities.
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EDGE LAYER
 Provides information exchange b/n the access
and core network.
 Provides It is an entry point in to carrier/service
provider core backbone networks.
 Used for aggregation of core switches.
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EDGE LAYER Cont’d
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Three IP/MPLS Layers - 10Gbps
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ACCESS LAYER
 Access layer is where broadband access devices and
ethio telecom’s other networks (GSM, CDMA, FL-NGN)
are connected.
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NETWORK EQUIPMENTS
 Routers: ZTE T8000,M6000-8,T1200, GER,
BRAS
 Switches: ZTE T160G and T64G
 DSLAMs
 MSAGs
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 ZXR10 M6000-8 carrier class router
 Switching Capacity: 1.92 Tbps
 Weight: < 145 k g
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BROADBAND ACCESS TECHNOLOGIES
 Broadband dial-up (PPPoE) and leased line (IPoE)
services
 ADSL2+ (up to 24Mbps) and VDSL2 (up to 250Mbps)
services.
 EPON – up to 1Gbps optical
 GPON – up to 2.5Gbps optical
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ADSL2+ PPPOE Network Link and
Traffic Flow
BRAS
BRAS
AAA Server
IP-NGN
Core
Internet
BRAS
Transmission
FL-NGN
Access
MSAG ADSL2+
CC
TB
Copper
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ADSL PPPOE Traffic Flow Procedure
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Customer dials using the PPPOE protocol that includes
customer account and password information.
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BRAS accepts the customers’ dialup request, and then using
the radius protocol, Synchronize the account/password and
speed information from the AAA server, Authenticate.
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If the account and password is correct, BRAS will assign a
dynamic address to the customer. Customers get the internet
access services through the PPPOE protocol and BRAS
controls the speed of customer internet access.
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If the account and password isn’t correct, BRAS Refuse the
customer’s internet access request and disconnection link.
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Modem
Customer
ADSL2+ IPOE Network Link and Traffic Flow
BRAS
BRAS
Internet
IP-NGN
Core
BRAS
Transmission
FL-NGN
Access
MSAG ADSL2+
CC
TB
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ADSL2+ IPOE Traffic Flow Procedure
 Customer gateway is deployed on the
BRAS;
 Traffic goes to the BRAS then forwarded to
the internet through IP NGN Network.
 The speed of internet access limitation will
be configured on the BRAS.
Copper
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Switch
Customer
Contacts of IP functional Maintenance Team
Name
Behailu Sisay
Wondifraw Belachew
Tigist Nigus
Abebe Anjojo
Abayneh Bahiru
Aberra Gebre
Telephone No.
0911217654
0911243521
0911502522
0911500193
0911504977
0911503505
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THANKS!
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