The Evolution of Enterprise Networking

1
The Evolution of Enterprise Networking
Bob Uszynski Data Network Consultant ATT
Technical Marketing April 2004
2
ATT Investments for the Future
Note Sprint excludes PCS, but includes ILEC
business
Source Company reports, Network Fusion,
Bankruptcy filings, Rep. Upton press release,
Kaufman Equity research
3
MCI has failed to make adequatecapital
investments since 2001
MCI WorldCom Historical CapEx
Source MCI SEC and Bankruptcy Court Filings
1Q014Q01 Avg. 1,971MM
CapEx (MM)
90 Drop in CapEx
3Q022Q03Avg. 191MM
Q1
Q2
Q3
Q4
Q1
Q2
Q31
Q4
Q1
Q22
2001
2002
2003
Note All figures culled from 10Q financials and
monthly operating reports submitted during
bankruptcy restructuring by WorldCom, Inc.
includes WorldCom subsidiaries (WorldCom Group,
MCI Group, et al.)
1 WorldCom, Inc. files voluntary bankruptcy
petition July 21, 2002 2 Partial quarter figure
reflects only April 2003 and May 2003 CapEx
(58MM and 90MM,respectively)
4
ATTs Areas of Investment

• Next Generation Optical Network
• International
• Advanced Packet Technologies MPLS, VOIP
• Managed Network and Hosting Services
• Local Services
• Customer Experience - Management and Control
• - 35B over the Past Five (5) Years to Build
  the Worlds Best Network
• - On September 10th ATT announced plans to
  invest an additional 3Bin its networks and
  systems through 2005

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NEXT GENERATION OPTICAL NETWORK
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US IP Backbone 3Q2003

• Three main components
• 16,000 Miles of State-of-the-Art fiber from
  Lucent Corning OC-768
• Intelligent Optical Switches allows for next
  generation services
• MANs/Multi-services Platform (MSP) --
  Interconnect with ATT Local Services - 70 cities
• International infrastructure to 150 countries.

Anchorage, AK
Seattle
Spokane
Portland
Portland
Manchester
Worcester
Minneapolis
R
Albany
St. Paul
Syracuse
Cambridge
Rochester
Glenview
Milwaukee
Hartford
Framingham
Madison
Grand Rapids
Wayne
Providence
Providence
Buffalo
RollingMeadows
Stamford
Bridgeport
Philadelphia
Detroit
NYC
Harrisburg
Des Moines
New Brunswick
White Plains
Salt LakeCity
Oak Brook
Cleveland
NYC Bdwy
Pittsburgh
Plymouth
Wash.DC
Cedar Knolls
R
Sacramento
Columbus
Davenport
Chicago
R
San Francisco
New York City
South Bend
R
Rochelle Pk
Chicago
R
Omaha
Las Vegas
San Francisco
Silver Springs
Newark
Denver
Akron
Dayton
Baltimore
Hamilton Square
Kansas City
Bohemia
Indianapolis
R
Arlington
Cincinnati
Freehold
Camden, NJ
Oakland
San Jose
Florissant
Norfolk
R
St Louis
ColoradoSprings
Louisville
Richmond
Redwood City
R
Raleigh
Los Angeles
Sherman Oaks
Springfield
Albuquerque
Greensboro
Nashville
R
OklahomaCity
Charlotte
Tulsa
SanBernardino
Honolulu
Little Rock
Columbia
Anaheim
Memphis
Gardena
Birmingham
Phoenix
Norcross
Dunwoody
San Diego
Atlanta
Dallas
Ft. Worth
Jacksonville
New Orleans
Austin
Orlando
Houston
R
Tampa
W. Palm Beach
R
Ft. Lauderdale
Ojus
Ft. Lauderdale
San Juan PR
Miami
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ATTs Current Network Architecture
Global
US
CBB
Private Data or IP
Public IP
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ATTs Network Architecture 2H 2004
MSE
MSE
Global
MSE
MSE
Opennet
AGN
GFN
MSE
US
HSPS IPFR/ATM
CBB
AFN
MSE
HSPS FR/ATM
Private Data or IP
Public IP
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ATTs Network Architecture 2H 2005
MSE
MSE
MSE
Global
AGN
Opennet
MSE
MPLS Core
MSE
US
HSPS IPFR/ATM
CBB
MSE
HSPS FR/ATM
MSE
MSE
Private Data or IP
Public IP
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ATTs Multi-Service Edge (MSE) (Target View)
Access speed
Access protocol
Application
MSE
DS1/3OC3

• - Corp WAN
• Intranet Traffic
• E-mail
• VOIP
• Public Internet

- ATM - FR/ATM - Ethernet - IP
OC3/12
DS0/1/3nxDS0/1
OC3
MPLS Core
OC3/12
Gigabit Ethernet
nxDS0nxDS1DS3
DS3OC3/12/48
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INTERNATIONAL
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ATTs Global Network

• The platforms we deploy domestically are also
  used internationally
• Customers get the same service from ATT all
  over the world

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IP CONVERGENCE ADVANCED PACKET TECHNOLOGY
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MPLS Unifying Network Architecture

• Application Benefits
• Full mesh connectivity
• Multiple classes of SVCVoice, Video, data
• IP VPNs

• Architecture Benefits
• Traffic Engineering
• Scalable, Hierarchical
• Layer 2 transport
• Reliability Security

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What is MPLS?

• Per the MPLS Forum
• Multi Protocol Label Switching (MPLS)
  Architecture is a key development in IP
  Technologies that will assist in adding a number
  of essential capabilities to todays IP networks,
  including
• Traffic Engineering,
• Providing Traffic with different qualitative
  Classes of Service (CoS) and quantitative Quality
  of Service (QoS) (e.g. SLAs)
• Provide enhanced restoration and provisioning
  capabilities
• Provide IP based Virtual Private Networks
• Defacto IETF Standard for RFC 2547 (IP VPNs)

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What is MPLS ?

• Multi Protocol Label Switching
• Provider backbone technology
• Supports Quality of Service
• Classes of Service for different applications
• Traffic Prioritization

• Any-to-Any connectivity
• Provides virtual private networks
• Secure connection to Internet
• Automatic Disaster Recovery

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What is CoS ?

• CoS is the ability to prioritize one type of
  traffic over another and to have some level of
  assurance that the traffic and service
  requirements can be satisfied.
• CoS does not create bandwidth it allows a
  customer and a carrier to more efficiently manage
  bandwidth according to application demands.
• Key CoS parameters to be managed /controlled are
  bandwidth, delay, jitter and packet loss

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Why Quality of Service is a concern
VoIP ERP Multimedia VPN WWW
Low Latency Required Low Bandwidth
Latency Tolerant Bursty Bandwidth
Non-Uniform Network Traffic demands Traffic
Management
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Why is CoS needed?

• Current demand
• Important applications such as Voice over IP,
  video-conferencing, and mission critical ERP
  (SAP) have strict delay and guarantee
  requirements to perform properly.
• The Network is being used increasingly for
  delivery of mission-critical information that
  cannot tolerate unpredictable losses.
• Solution
• The enterprise network must be designed with the
  ability to differentiate traffic and enable
  different service levels for different users and
  applications.

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How can we achieve Quality of Service?
By applying several traffic mgmt techniques in
the customer site router and the carrier network
a quality solution is created.

• Classification
• Classification of packets into different lists is
  done in the customer router based on customer
  requirements
• Marking
• Controls the amount of traffic accepted for each
  class
• Policing
• Discards the excess traffic

• Traffic Shaping
• Queues the access traffic
• Fair Queuing
• Provides minimum bandwidth guarantee to each
  class. One queue used for each class
• Congestion mechanism
• In case of congestion, traffic of the lowest
  priority class is discarded first

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CoS via IP Packet Marking

• CE classifies traffic per packet via marking
• IP Precedence bits or Dif Serv Code Points
• Marking interpreted ?
• Separate queuing per class
• Per class resource scheduling, e.g.,
• Priority queuing (LLQ)
• Bandwidth scheduling (CBWFQ)

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IP Enabled Frame RelayMPLS on a Frame Network
IP Frame offers Any-to-any connectivity and Class
of SVC over a Frame Network by MPLS tag switching
Site A
Site B
MPLS Switching
Site D
Site C
Traditional Frame PVC
Enterprise PVC
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Private Network Transport (PNT) MPLS on an IP
Network
PNT offers any-to-any Private connectivity and
Class of SVC over an IP Network without VPN
equipment
Data Packet - two labels
The outer label (first-level) is the forwarding
transport across core
The inner label (second-level) identifies the
customer VPN
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Pathways to the Future
ATT offers clients the option to evolve their
network with service or management growth
options.
EVPN
IP Frame w/ Frame Plus orManaged Router
Layer 3 MPLS/IP
IP Frame, PNT
Network Services --------------gt
Frame Plus
Managed Router Svc
Layer 2
Self Managed
Out tasked
Fully Managed
Network Management ----------------gt
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VOIP Design Principles

• Common Architecture for all real time svcs
• Maximize usage on a single set of shared
  resources
• Accommodate multiple access technologies
• SIP as common internal signaling protocol
• Open standards for all internal interfaces
• Provide security to protect ATT and client
  assets
• Build capacity to track demand

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ATTs Integrated Portfolio of Modular VoIP / IPT
Services
Client Managed
Integrated with Managed Network
ATT Fully Managed
Technology Domains
Professional Services

• Design VoIP LAN/WAN Architecture
• Deploy ETE Architecture

• VoIP / IPT Technology ROI Assessment

• IP Contact Center
• Hosting IP Contact Center

Applications and Services

• IP Centrex
• Call Center Routing

Integrated Across WAN, LAN, and Apps ETE
Solutions Supporting Multiple Protocols

• Managed IP Telephony (Hosted or Client Prem)

• IP Telephony
• Hosted IP PBX

• IP PBX Interoperability (Cisco/ Avaya/Nortel/
  Alcatel Certified) with Managed VoIP Svces

Premises Infrastructure / LAN

• IP Enabled Frame Relay (Voice CoS 1)
• PNT (3Q04) (Voice CoS 1)
• Advanced 800 Services

• Managed VoIP Services
• -- MRS with VoIP
• -- MIS with VoIP
• - with AVTS Option
• - with PNT option
• -- EVPN with VoIP

Connectivity and Access / WAN
Increased Levels of Management Efficiencies,
Cost Savings Service Guarantees
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Domestic Managed Internet Service (MIS) with VoIP

• Managed Router equipped with gateway cards
• QoS at access and edge routers w/ priority
  queuing enabling CoS 1
• Interoperability withVo MRS and IP PBX
• On-net and off-net calls supported
• Low bandwidth per call (15K per call / 4 calls
  per DSO)
• VoIP quality reports
• 768kbps to T3 access speeds supported
• Ordered and billed through MIS
• PNT provides QoS through MPLS in WAN

Enterprise Site - IP PBX
IP/IP EnabledPBX
IP Phone
PCs
MISVoIPPacketsH.323
ATT Call Control Element
Router
LAN
On-Net Calls
Off-Net Calls
PC PhoneClient
Premises VoIP Gateway
Enterprise Site - Legacy PBX Integration
MIS
PCs
LAN
4E / Edge
PSTN
On-Net Calls
Router
Existing Customer PBX
Off-Net Calls
TDM Phones
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ATT Offer Continuum
Managed Network Services
ATT MNS - router, VoIP, mux, servers
Managed Applications Dedicated or Shared
Hosting Co-location Services
Network Hosted Services
ATT Customer Care, Operations, Maintenance,
Provisioning
IP-based services ATT Remote Access Solutions,
ATT Internet Intranet offers VPN Services
Connectivity Services
ATT Private Line, ATT Frame Relay, ATT ATM
Services, Wireless, Local and Access
Transport Services
Largest, most reliable core network, FASTAR,
SONET, DWDM
Core Network
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LOCAL SERVICES
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ATTs On-Net Initiative

• Free Space Optics
• 38 GHz
• DSL
• Satellite
• WiFi
• ATT's Local Network Services (LNS)

Customers Office
ATT On-Net
LNS
LNS SONET Backbone
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THANK YOU