at&t multi protocol label switching

AT&T Proprietary Information

AT&T Multi-protocol Label Switching Private Network Transport Service

(MPLS PNT)

National Communications Tel: 866-624-2008Email: [email protected]


Agenda

• Your Business Requirements

• What is MPLS?

• MPLS PNT Offer – IP VPN

• The Value of MPLS PNT

• Wrap Up and Q&A


Your Business Requirements

AT&T Designs Networking Solutions for Your

Business Needs

AT&T Designs Networking Solutions for Your

Business Needs

Easy to use, integrated services

Consistent customer support

Global solutions thatgrow with the business

Migration path to new technologies

Superior customer experience

Value for return on communications

investment

Consistent and predictable services

On-timeimplementation


AT&T’s IP Network: Engineered to Your Requirements

AT&T is Investing to Operate the World’s Best IP Network

HQ End User

Corporate Sites

Business Partners

Corporate Sites

Business Partners

HQ

Remote Worker End User

Single AT&T Global Network

End-to-End Quality of Service

AT&Ts Network Evolution: Optimizing Application Performance with MPLS • Supports Quality of Service/Classes of services for different applications

–Traffic Prioritization• Scalable Virtual Private Networks (VPN)

Varying Degrees of Management


MPLS in the AT&T Global Network Backbone

X-overServicesNetwork

CSR

Frame VPNs

Internet Private & I1.1 Servers

SNA

ATM & FrameInfrastructure

NCP

RAS

CSR

CSR

NCP

CSR

Shared ServersCSR

PE Shared MPLS

Network

PE

PE

PE

Optical Core

Network

PE

CSR

Internet MPLS VPNs

Edge VPNs

RAS


How MPLS forwards PacketsData Packet Two Labels

The inner label (second-level) identifies the destination VPN and customer address

Egress MPLS Edge Router removes

labelsfrom each packet

The outer label (first-level) is the forwarding label for transport within the core

Ingress MPLS Edge Router adds two labels to each packet


Convergence - Wouldn’t this be Nice?

Internet Internet

ApplicationsApplicationsInternet Internet

ApplicationsApplications

Data Data

ApplicationsApplicationsData Data

ApplicationsApplications

MPLS IP MPLS IP

BackboneBackboneMPLS IP MPLS IP

BackboneBackbone

Voice Voice ApplicationsApplications

MPLS Enabled IP Network – All Applications on ONE IP Network


MIS – Managed Internet Service The Foundation for MPLS PNT

LAN

AT&T CBB

(IP Backbone)

CustomerPremises

Customerrouter

Public Internet

local access

AT&TPOP

Accessrouter

Provides customers with managed, dedicated connectivity to the public Internet, complemented with a number of value added services. AT&T carries customers’ traffic to anywhere on the Internet

DescriptionDedicated port into AT&T’s OC48/OC192 Common Backbone - no single point of

failure in the core backbone:• Designed with multiple rings for alternative routes between nodes• Routers deployed in a redundant fashion (power, processors)

• Access speeds range 56kbps – 2.5 Gbps (OC48)• Access options: PL, FR, ATM, T1SINA, Ethernet

• MIS with CPE option includes: equipment lease, installation, monitoring, and maintenance; also offer redundant configuration (“Cold Standby” CPE)


What is AT&T MPLS PNT?

PNT is a new type of VPN (Hybrid of the traditional models)

– Provisioned on the AT&T IP Network

– Uses MPLS (Multiprotocol Label Switching) to provide security

Does not need additional VPN gear at the customer’s site for security

• A private networking environment in a shared infrastructure (IP

Network) utilizing Multiprotocol Label Switching (MPLS)

technology based on IETF Standard (RFC 2547)

Simply stated – A network-based IP VPN


Applications of MPLS PNT

VPN

– MIS PNT is a network based VPN, which offers all of the benefits of traditional IP based VPNs without the need for additional VPN gear and management

Point to Point Connection

– MIS PNT provides a dedicated, replicable, and secure path through the AT&T IP Backbone

Merge Networks (FR, ATM, IP)

– MIS PNT gives customers the ability to have the security of FR on an IP network. Therefore, they can have Internet access and security and CoS all on one network


Features of MPLS PNT Access Speeds

– Packet over SONET (POS) interface access for T1, T3, OC3, OC12 and OC48 (Fractional T1 is not available at this time – coming 1Q04)

– (NxT1 is not available at this time – however MARO ALB is available)

Addressing– Allows both private (example10.x.x) and public addressing

Routing protocol– Supports both Static and BGP (depending on PNT model)

Billing options– Flat rate, Burstable, Hi-Cap Flex, and aggregate

Internet Access– MPLS PNT does not provide internet access (on the same port – Coming soon!)

– Internet access can be provided by purchasing Internet ports and will incur additional charges

Management– Supports both managed and unmanaged options

Footprint– Domestic US only


Model Examples of MPLS PNT

CE router will send AT&T's PE (AR) router labels identifying the VPN. The AT&T PE router adds labels identifying the path through the network

PE(AR)

P (BR)

PE(AR)

DownstreamISP’s MPLS

VPN

MPLS VPN

DownstreamISP’s MPLS

VPN

CE

CE

Label Transport IP Transport

CE router will act just like any other IP router. The CE router will send IP packets to AT&T's PE router (AR). The AT&T PE router assigns VPN labels to the packets

PE(AR)

P (BR)

PE(AR)

CustomerRegion 1 MPLS VPN

CustomerRegion 2

CE

CE


The Value of Both Models MPLS IP Transport

(CPE does not send a VPN label to AT&T AR)

– Customer Edge router (CE) will send IP traffic to AT&T PE router

– AT&T PE router (AR) will assign two labels to the customer’s packets.

– One label identifies the VPN and the other label identifies the path through the AT&T network

– Static and BGP routing protocol between customer router and AT&T access router

– Advantage:

Simplicity. Customer doesn’t have to understand MPLS but will be provided a network based VPN

MPLS Label Transport (CPE sends a VPN label to AT&T AR)

– CE router must be LDP (MPLS Label Distributed Protocol) enabled. It will send IP traffic to AT&T PE Router and add additional labels identifying the VPN

– AT&T PE router (AR) will assign two more labels to the customer’s packets identifying the VPN and path through the AT&T network

– The combination of the customers labels plus AT&T’s labels creates the labels needed for MIS PNT

– Static routing protocol supported between customer router and AT&T router at this time.

– Advantage:

» Customer does not need to send AT&T their external routes

» Customer can run MPLS within their regional network

» Customer can offer MPLS VPN to their own customers.


How Label Transport Model Works• IP Backbone has been MPLS enabled

• During the Provisioning process, AT&T creates a “VPN ID” for the customer

• The Provider Edge (PE) router (or Access Router) will terminate Customer Edge (CE) routers (or Customer Routers) MPLS PNT ports and assign a VPN label to it.

• PE router will then add on another label for packet forwarding purposes. Once the packet gets into the backbone core, the Provider’s (P) routers (or Backbone Routers) will have no knowledge of this VPN, where it terminates, or its IP addresses. The P routers will just forward the labeled packets, following the normal network routing mechanism.

• Once the packet reaches the destination PE router, it will then strip off the forwarding label.

• Based on the VPN label, the destination PE router will know which port belongs to the VPN. It will then take off the VPN label, and send the packets to the designated port connected to the CE router.


Class of Service With MPLS PNT

CR1 AR1 BR

CBBCore

CR2AR2

• Packet prioritization by reordering • Bandwidth allocation• Congestion management

CR=Customer RouterAR=Access Router


Service Level Agreements (SLAs)

SLAs– 99.99% Availability

– 60 millisecond Network Latency/Delay

– <0.7% Packet Loss

Provisioning• T1: 32 Business days

• T3: 42 Business days

• OC3 : 63 Business days


The Value of MPLS PNT Cost Effectiveness

– Significant cost savings – 10%-40% compared to “Traditional VPNs”

– Merges both Internet and private networking needs over one cost effective network

Layer 3 PPP local access– Offers end to end Native IP

Guaranteed Full Port Speeds– Not a CIR/CDR concept that cannot “guarantee” port speed

Extensive U.S. Domestic Reach via the AT&T IP Backbone - a Native IP Network– Uniform MPLS-enabled IP Network– Access independent

Security– MPLS inherent security on par with Frame Relay– Additional optional AT&T Security Services

High Performance Network– Available with MARO (MIS Access Redundancy Options)

– Tier 1 carrier-class IP network reliability and performance Predicatable Performance (QoS)

– Multiple Classes of Service supported to accomodate all types of applications


The Value of MPLS PNT - con’t Project Management

– Comprehensive network solution design leveraging AT&T engineering and operational expertise

– Project and deployment management utilizing global tool set to develop, document and drive implementations globally

Simplicity of One Stop Shop with Flexible Billing Options – One contract, one price schedule, one servicing model deployment / operation / customer

care, one bill– Billing includes options for flat rate, burstable, hi-cap flex and aggregate

Scalability – Network based service can be scaled easily in terms of sites and speeds

– Fully meshed connectivity to all sites with just a single connection into the VPN

Simplicity– No tunnel or PVC provisioning and maintenance required

Flexibility– Add or delete sites/routes as needed

Excellent Customer Support– 24X7 customer care and network support


AT&T Accolades

AT&T IP backbone is the largest US IP backbone in traffic volume

AT&T IP backbone is the best performing IP backbone in the industry

A clear leader of managed data networking provider in large enterprise market in a enterprise survey

Data market leader in performance and presence by META Group

AT&T ranked highest on Gartner’s US NSP Magic Quadrant with best “Ability to Execute” and “Completeness of Vision”

First and ONLY carrier with both a coast to coast OC-192 AND more than 1.8M sq. ft. of hosting capacity

Handles 2,700 trillion bytes of data on an average business day, equivalent to the printed contents of the Library of Congress, every 11 minutes

Operates with 99.999 percent network reliability for ATM and Frame Relay,as well as 99.99 percent reliability for IP services


AT&T: The World’s Networking Company

Thank You


Back Up Slides


MIS Access Redundancy Options (MARO)• Purchase multiple connections to the AT&T IP backbone to help protect against potential failure in

any single component of the MIS circuit. e.g., customer’s access router, IP backbone router, circuit link, etc.

• AT&T will coordinate with the customer to implement their desired traffic flow over the two links and manage the necessary BGP4 routing

• Fast rerouting within the AT&T network upon failure• AT&T will implement failover mechanisms to protect against failures of the MIS Managed Routers

on customer premises• AT&T can provide network professional services to assist in traffic flow design, load sharing, BGP4

design, etc. for MIS customers with or without Managed routers

AR

CR

POP

IOC

LC

AR

CR

BackboneBackbone BackboneBackbone

Customer site

AR

CR

POPIOC

LC

AR

CR

BackboneBackbone

Customer site

AR

CR

POP

IOC

LC

BackboneBackbone

Customer site

Backbone Node Redundancy Access Router Redundancy Automatic Load

Balancing