Cisco Networkers 2006 - AGG-1020 - Introduction to Broadband Aggregation Architectures

8/13/2019 Cisco Networkers 2006 - AGG-1020 - Introduction to Broadband Aggregation Architectures

1/25

1 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicAGG-1020

12662_05_2006_c1

Introduction to BroadbandAggregation Architectures

AGG-1020


2/25


12662_05_2006_c1

Objectives and Purpose

List various broadband aggregation architectures

Identify the technologies used by each architectureand how each architecture functions

Identify benefits of each architecture

Upon Completion of this session,You Will Be Able to Do the Following:

This session is a primer for LABAGGsessions at Cisco Networkers 2006


3/25


12662_05_2006_c1

Broadband Aggregation Introduction

CPECustomer Premises Equipment

NAPNetwork Access Provider

NSPNetwork Service Provider

CPE NAP NSP

Video

Voice

Content

ATU-RDSLAM

Aggregation

Service Selection

Core

Termination

Service

Selection

Enterprise

Internet

ISP

Internet


4/25


12662_05_2006_c1

Broadband Aggregation IntroductionCPE

CPE NAP NSP

Video

Voice

Content

ATU-RDSLAM

Aggregation

Service Selection

Core

Termination

Service

Selection

Enterprise

Internet

ISP

Internet

Provides Layer 1 through 3 functions


5/25


12662_05_2006_c1

Broadband Aggregation IntroductionNAP

Subscriber termination

Aggregation

Core Network

CPE NAP NSP

Video

Voice

Content

ATU-RDSLAM

Aggregation

Service Selection

Core

Termination

Service

Selection

Enterprise

Internet

ISP

Internet


6/25


12662_05_2006_c1

Broadband Aggregation IntroductionNSP

CPE NAP NSP

Video

Voice

Content

ATU-RDSLAM

Aggregation

Service Selection

Core

Termination

Service

Selection

Enterprise

Internet

ISP

Internet

Termination of service selection

Internet access

Services


7/257 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicAGG-1020

12662_05_2006_c1

Broadband Aggregation Introduction (Cont.)

CPE NAP NSP

Video

Voice

Content

ATU-RDSLAM

Aggregation

Service Selection

Core

Termination

Service

Selection

Enterprise

Internet

ISP

Internet

Training Focus



12662_05_2006_c1

Retail and Wholesale Services

Characteristics of a Retail Service

Owns the subscriber service (gets the monthly subscription)

Dictates the class of service (the line rate)

Provides access to the internet and other value-added servicessuch as e-mail

SubscriberServiceProvider



12662_05_2006_c1

Retail and Wholesale Service (Cont.)

Characteristics of a Wholesale Service

Carrier connects subscriber to service provider

Offers a range of network architectures to achieve this

Retailer still owns the customer but payspercentage of monthly subscription to wholesalerfor connectivity services

Wholesaler often has retail business

SubscriberServiceProvider

Carrier

ILEC



12662_05_2006_c1

VC Service

DSLAMs

(Local Exchanges)

BRASISP1.com

Local Loops

ISP2.com

ATM Core

NetworkATM Access

Network

ISP2.com

ISP1.com

Each Subscriber Is Presented as a Unique VC to the ISP

Local Loops

Local Loops

Local Loops



12662_05_2006_c1

DSLAM

ATM Bridging and Routing Methods

RFC 1483 Bridging

RFC 1483 Bridging with RBE

RFC 1483 Routing

AggregationDevice

Core

Routed

CPE

Bridged

CPE

Bridging

RBE

Routing

ISP1.com

ISP2.com

Bridged

CPE Routing

BridgeGroup



12662_05_2006_c1

FR,

etc.

PHY

Layer 3

NCP

LCP

HDLC

PHY

Point-to-Point Protocol (PPP) Review

PPP uses HDLC framing

PPP packet types

LCPLink Control Protocol

Link establishment, termination, AND maintenance

AuthenticationPAP or CHAP

NCPNetwork Control Protocol

Encapsulation of Layer 3 protocol

For example IPCP

Point-to-Point Link

Layer 3

NCP

LCP

HDLC

PHY

ATM, FR, etc.

Layer 3

ATM

Layer 3

FR,

etc.

PHY

ATM



12662_05_2006_c1

PPP Review (Cont.)

PPP Link Operation

Link Dead Phase

Link Establishment Phase

Authentication Phase

Network-Layer Protocol Phase

Data Exchange

Link Termination Phase

Configure Request

Configure Ack

IPCP Configure Request

IPCP Configure Ack

Data

Terminate Request

Terminate Ack

Configure AckConfigure Request

IPCP Configure AckIPCP Configure Request

Data

Terminate AckTerminate Request

Authentication Packets Authentication Packets



12662_05_2006_c1

PPP Broadband Access Methods

PPP over ATM (PPPoA)

PPP session initiated by CPE

PPP over Ethernet (PPPoE)

PPP sessions initiated by the client or CPE

DSLAM

AggregationDevice

Bridged CPE

CPE

PPPoA

PPPoE

PPP Sessions

ISP1.com

ISP2.com

Core

PPP Session


15/2515 2006 Cisco Systems, Inc. All rights reserved. Cisco Public

AGG-1020

12662_05_2006_c1

PTA

PPP termination and aggregation (PTA)

Terminate PPP sessions at the aggregation device

Route IP data to the ISP or corporate site

Useful for service providers own customers

DSLAM

Bridged CPE

CPE

PPPoA

PPPoE

PPP Sessions

PTA IP Route

Internet

PPP Session

AggregationDevice



AGG-1020

12662_05_2006_c1

ISP1.com

ISP2.com

L2TP

Layer 2 Tunneling Protocol (L2TP)

Terminate PPP sessions at the ISP or corporate site

Example usage: between wholesale and retail service

providers

DSLAMBridged CPE

CPE

PPPoA

PPPoE

PPP Sessions

PPP Session

IPCore

LAC LNS

LNSTunnel

AggregationDevice



AGG-1020

12662_05_2006_c1

AAA

Authentication,Authorization, andAccounting (AAA)

Who can access the network

What can they access

Usage tracking

Authentication methods

Local

RADIUS

TACACS+

AAAUser

RADIUS

TACACS+

LocalAAA

PPPL2TP



AGG-1020

12662_05_2006_c1

Managed LNS

Deploy virtual router (LNS/PTA) for eachupstream customer to improve service scale

Communicate directly with customer AAA without needing proxy

Multiple VRFs separate customer traffic without overhead of L2TP tunneling

Does not require MPLS

Customer B

SPNetwork

AAA

AAA

LNS/PTA

VRF

Clients

DHCP

DHCP

AAA

VRFL2TP or PPP

Customer A



AGG-1020

12662_05_2006_c1

Remote Access into MPLS

PPPoX to MPLS VPN

RBE to MPLS VPN

L2TP to MPLS VPN

1483 Routed to MPLS VPN

Clients

NSP

Corporation

PE

AAA

AAA

BRAS

PE

PE

MPLS Network

AAADHCP



AGG-1020

12662_05_2006_c1

Session Control

AAA Director

y

Dial

ADSL

GGSN/PDSN

Notebook

PDA

WAP

LeasedLine

PC

ASP

802.11b

ISP

Corporate

VPN

Walled Garden

Service POP

Video Content Voice

SessionController

SessionManager


21/25


12662_05_2006_c1

Summary

List various broadband aggregation architectures

Identify the technologies used by each architectureand how each architecture functions

Identify benefits of each architecture

In this Session,You Learned the Following:


22/25


12662_05_2006_c1

Related Cisco Networkers Sessions

The following are related Networkers sessions:

LABAGG-2020Understanding and Configuring PPPoE onCisco Aggregation Routers

LABAGG-2021Understanding and Configuring PPPoA onCisco Aggregation Routers

LABAGG-2022Using PPPoA and PPPoE OptimizationFeatures on Cisco Aggregation Routers

LABAGG-2020Understanding and Configuring L2TP on

Cisco Aggregation Routers


23/25


12662_05_2006_c1

Related Training and Reading

Related Training

Networkers sessions AGG-1020 and LABAGG-2020 throughLABAGG-2023 are derived from the Cisco training courseImplementing Broadband Aggregation on Cisco Routers(BBAGG).

This course is available through Cisco learning partners.

For inquiries contact [email protected]

Recommended Reading

Design and Implementation of DSL-Based Access SolutionsSanjeev Mervana and Chris LeCisco Press, ISBN 1-58705-021-8
mailto:[email protected]:[email protected]:[email protected]:[email protected]


24/25


12662_05_2006_c1

Complete Your Online Session Evaluation

Win fabulous prizes; Give us your feedback

Receive ten Passport Points for eachsession evaluation you complete

Go to the Internet stations locatedthroughout the Convention Center tocomplete your session evaluation

Drawings will be held in theWorld of Solutions

Tuesday, June 20 at 12:15 p.m.

Wednesday, June 21 at 12:15 p.m.Thursday, June 22 at 12:15 p.m. and 2:00 p.m.


25/25

AGG 1020

Documents

Cisco Networkers 2006 - AGG-1020 - Introduction to Broadband Aggregation Architectures