1. AT&T Multi-protocol Label Switching Private Network Transport Service (MPLS PNT)
National Communications
Tel:

2. Agenda Your Business Requirements What is MPLS?
MPLS PNT Offer – IP VPN
The Value of MPLS PNT
Wrap Up and Q&A

3. Your Business Requirements
Global solutions that grow with the business
Consistent customer support
Consistent and predictable services
Superior customer experience
Easy to use, integrated services
Migration path to new technologies
Value for return on communications investment
On-time implementation
Ability to Leverage the Latest Technologies
Offer customers what they want and stay ahead of there competition
One Future Proof Network
A network that will run tomorrow’s applications
Lower Networking Costs
Lower total cost of ownership
Simplification
Ability to add and remove locations with ease
Technology that does require a team of “Rocket Scientists” to operate
High Performance and Flexible Bandwidth Growth
Class of service provides an effective means of handling a complex application mix
AT&T Designs Networking Solutions for Your
Business Needs

4. AT&T is Investing to Operate the World’s Best IP Network
AT&T’s IP Network: Engineered to Your Requirements
AT&T is Investing to Operate the World’s Best IP Network
Corporate Sites
Business Partners HQ
Remote Worker
End User
Single AT&T Global Network HQ
End User
Corporate Sites
Business Partners
End-to-End Quality of Service
Varying Degrees of Management
Overview:
To ensure that our customers continually have optimal reach and performance, AT&T is aggressively building out our core network on a global basis. Since 1998, AT&T has invested more than $35 billion in its networking infrastructure to create a global, packet based, intelligent network.
Key Discussion Points:
1)       Geographic: Where do you need to go?
Are your geographic requirements changing (global/domestic)?
What levels of support do you need consistently delivered globally?
2)       Performance: What are the price/performance trade-offs.
What requirements are new web-based apps driving your networking?
Where are 5 9’s of reliability mandatory. Where are they “optional”?
What would having an MPLS-based IP network mean to you?
AT&T Proof Points:
Investing in the edge:
Key area for unlocking value. By increasing our local footprint (around the world) it allows us to control our costs, create new capabilities, and reduce our cycle times. AT&T has shifted its focus on investment dollars from the core to the edge.
Investing in the core:
Consolidating on a common core network via our Intelligent Optical Network:
1)Bandwidth-on-demand via our IP-based MPLS Core
AT&T’s IP infrastructure is a leader in the industry: AT&T has been rated as having the top performing dial platform for more than 3 years running. AT&T has also been recognized by the industry analyst firm Ryan Hankin Kent as being the leader in IP traffic volume.
Investing in an integrated management platform:
AT&T’s e-servicing platform and iGEMS (integrated global Enterprise Management System) provides consistent support on a global basis with improved service level management capabilities as well as a wide array of integrated, easy to use e-servicing tools.
Closing Point:
The overall impact of a business process transformation is strongly connected to the reach and performance capabilities of the networking infrastructure. If the ability to consistently manage the performance of the network is not designed to scale, the quality of a business process transformation will be compromised.
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)

5. MPLS in the AT&T Global Network Backbone
RAS
Internet
Edge VPNs
Private &
I1.1 Servers
RAS
Shared
Servers
NCP
CSR
CSR
CSR
X-over
Services
Network
SNA PE PE
NCP
Internet
MPLS VPNs PE PE
Shared MPLS Network
CSR PE
AT&T Global Network is a seamless, ubiquitous network that has been designed on the same state of the art equipment as in the AT&T Frame/ATM network in the US. Use of the same platform and equipment makes it easy to maintain the network and makes it possible for AT&T to quickly deploy services and technologies consistently any where in the world.
This network allows us to offer a seamless suite of VPN solutions on a global basis, with MPLS at the core with the ability to offer Class of Services.
What is Multiprotocol Label Switching (MPLS)?
MPLS allows the network to transmit data packets, using standard IP routing protocols, to any-to-any location via a short, pre-determined path across the AT&T network. Customers looking for simplified fully-meshed communications and those with a need for distributed communications now have an elegantly simple solution that gives them the best of both worlds-the ubiquitous access of IP and the security and reliability of Frame Relay / ATM.
Multi-protocol label switching architecture describes the mechanisms to perform label switching---which combines the benefits of packet forwarding based on layer 2 switching, with the benefits of layer 3 routing.
MPLS supports quality of service for your business applications: This means that you will have class of services for different applications and traffic prioritization. In addition, you will receive any-to-any connectivity meaning fully meshed connectivity, as wells as secure VPNs.
Now let’s look at a comparison of the operations required to update an overlay IP managed network vs. an IP managed network based on MPLS.
Adding a new CPE device to the customer’s network requires that a number of steps be taken in both the providers network and the customer’s network. In the provider’s network, N-1 new PVCs are required to fully connect the new node.A new traffic matrix is required to resize the PVC mesh, and all of the customer’s PVCs need to be resized. A new OSPF routing topology may also be required, especially if the PVCs are not fully meshed. In the customer’s network, each CPE device must be updated with the new IP topology.
The problem with this approach is that the Frame Relay or ATM network has no IP awareness, so it is unable to help simplify the operations that take place at the IP layer.
In contrast, adding a new CPE device with an MPLS-based managed IP network is simple. Here, only the new CPE device needs to be configured to understand how to reach the network. The POP edge LSR also needs to be configured to know which VPN(s) the CPE device belongs to. Since the network is VPN-aware, it is able to update the CPE with VPN reachability. The same routing update process also informs the other CPE devices about this new entrant.
Of course, you may also need to reconfigure the trunks in your network to handle the additional capacity, but this is not typically required for each new customer edge device.
CSR
Frame
VPNs
ATM & Frame
Infrastructure
Optical Core Network
CSR

6. How MPLS forwards Packets
Data Packet
Two Labels
The inner label (second-level) identifies the destination VPN and customer address
The outer label (first-level) is the forwarding label for transport within the core
Egress MPLS Edge
Router removes labels
from each packet
Ingress MPLS Edge Router adds two labels to each packet

7. Convergence - Wouldn’t this be Nice?
MPLS Enabled IP Network – All Applications on ONE IP Network
Data Applications
Voice Applications
MPLS IP Backbone
Internet Applications

8. MIS – Managed Internet Service The Foundation for MPLS PNT
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
LAN
Customer
Premises
Customer
router
Description
Dedicated 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)
local access
AT&T
POP
Access
router
AT&T CBB
(IP Backbone)
Public Internet

9. Simply stated – A network-based IP VPN
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
Traditional VPNs
On IP networks - Use special VPN gear at the customer’s site (“edge”) to secure data
On Frame or ATM networks - Use PVCs in the provider’s network to secure data

10. 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

11. Features of MPLS PNT Access Speeds Addressing Routing protocol
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

12. Model Examples of MPLS PNT
Label Transport IP Transport PE
(AR) P
(BR)
Downstream
ISP’s MPLS
VPN
MPLS VPN CE PE
(AR) P
(BR)
Customer
Region 1
MPLS VPN
Region 2 CE
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
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

13. The Value of Both Models
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.
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

14. 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.

15. Class of Service With MPLS PNT
CBB
Core BR
CR2
CR1
AR1
AR2
For traffic flow direction from CR1 to CR2, queuing and prioritization is done at CR1 outgoing interface towards AR1 and AR2 out going interface towards CR2. For traffic flow direction from CR2 to CR1, the queuing and prioritization is done at CR2 outgoing interface towards AR2 and AR1 outgoing interface towards CR1.
Basically, the CR and AR work together. AR2 will honor the TOS bits marked by CR1 and queue different classes accordingly, to deliver the performance at the AR2-CR2 link. Vise versa for CR2 and AR1.
Types of queuing mechanisms used are Low Latency Queue, Class Based Weighted Fair Queuing, and Weighted Random Early Drop.
Packet prioritization by reordering
Bandwidth allocation
Congestion management
CR=Customer Router
AR=Access Router

16. Service Level Agreements (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

17. The Value of MPLS PNT Cost Effectiveness Layer 3 PPP local access
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

18. 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

19. AT&T Accolades
AT&T ranked highest on Gartner’s US NSP Magic Quadrant with best “Ability to Execute” and “Completeness of Vision”
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
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 percent network reliability for ATM and Frame Relay,as well as percent reliability for IP services

20. AT&T: The World’s Networking Company
Thank You

21. Back Up Slides

22. 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
Backbone Node Redundancy Access Router Redundancy Automatic Load Balancing AR CR
POP
IOC LC AR CR
POP
IOC LC
Backbone
Backbone
Backbone AR CR
POP
IOC LC
Backbone
Customer site
Customer site
Customer site