User Group

May 24, 2005

Metro Ethernet- Table of Contents

I. Why Ethernet?II. Metro Ethernet Product DescriptionIII. Metro Ethernet Product ComparisonIV. Metro Ethernet Product AvailabilityV. Metro Ethernet Development StrategyVI. Ethernet over SONET Product DescriptionVII. Ethernet over SONET Development

Strategy

Why Talk About Ethernet?

• In 2002, Ethernet was 1% of a $23B market…By 2007, Ethernet will be 10% of a $38B market – Yankee Group

• “…services are becoming clearly delineated, and customers have begun to ask for the services by name…the service gaining prominence in the metro market in the next 3 years” – Yankee Group

• Metro Ethernet addresses customer demand for guaranteed bandwidth and QoS – Reduce bandwidth contention – no longer a “Best

Effort” service– SLAs, especially for service availability– Support for voice and specialized applications

• Retains the economic NMLI/GigE value proposition– Very high bandwidths at an affordable price– Economically scales from 10Mbps up to 1000Mbps– Customers can transparently leverage low-cost

network equipment (CPE) and employee expertise

Why BellSouth Metro Ethernet?

• Education

• Healthcare

• Financial

• Government

Metro Ethernet Application Examples

Premium Service - Feature Description

• Committed Bandwidth Rate (CBW)– CIR-like capability is designed to eliminate bandwidth

contention; Customer gets the bandwidth they subscribe to– Minimum BW across the switched core network that will

always be available to transport data originating from a specific customer location

– 10, 20, 50, 100, 250, 500 Mbps speeds available– Bandwidth overhead included in CBW Rate

• IFG, Broadcast Overhead• Packets above CBW limit are dropped

– Uses Policing• Policing on Ingress Port (Access)• No Traffic Shaping Utilized• No Egress Policing (Full Line Rate)

– Basic Building Block for Premium Service

Premium Service - Feature Description

• CBW with Bursting– Burstable bandwidth not guaranteed; only when available– Burst speeds are limited to ingress port speed (line rate)– Each CBW is associated with a maximum burst rate:

• CBW (Mbps) Maximum Burst Rate (Mbps)

• 10 100• 20 100• 50 100• 100 1000• 250 1000• 500 1000

– CBW without bursting – “Fixed mode”– CBW + bursting – “Burst mode”

Premium Service - Feature Description

REMOTE SITES Host Site

100 Mbps CBW100 Mbps CBW

50 Mbps CBW50 Mbps CBW

100 Mbps CBW

250 Mbps CBW – Fixedon a 1000Mbps Port

400 Mbps

300 Mbps

100 Mbps

250 Mbps100 Mbps

Premium Service - Feature Description

• CBW with “Priority Plus”– Provides customers a means of managing their real-time

delay-sensitive traffic (VoIP, video, data mirroring)– Priority Plus traffic carries the highest priority on network– Cisco 7609 examines IP Precedence (IPP) bits value on

incoming traffic• 8 priority levels into ingress port (0 – 7)• IPP = 5 - Priority Plus• IPP = 1-4, 6, 7 – Treat as CBW• Priority Plus traffic is directed to a low-latency trunk queue • Amount of priority traffic is limited as a percentage of CBW• Priority traffic exceeding CBW percentage limit will be

discarded– Requires Committed Bandwidth (CBW)

Premium Service - Feature Description• “Q Forwarding”

– Supports VLAN Aggregation• IEEE 802.1Q Specifications• Supports up to 2 Layers of VLAN Stacking• Maximum Frame MTU 1536 Bytes

– Targeted to ISPs and Carriers requiring VLAN segregation• Reduces cost for the ISP• Provides security for the ISP’s customers

– Customer Access Port• BellSouth & Customer agrees to 802.1Q Tag• Q-tag designates specific customer• Tag passed to aggregation port

– Service Mix• CBW• CBW w/Priority

– Frame Header• MTU Size Increases by 4 Bytes for each Tag Added

Aggregation with Q Forwarding

Cisco 7609

Customer C

Host

Customer A

Customer B

Customer AVLAN tag = 55

Customer BVLAN tag = 32

Customer CVLAN tag = 55

500M CBW

21

22

24

21

22

24

Customer Network Management

• Web-enabled GUI on customer’s desktop• Primary Capabilities:

– Service Status Monitoring– Performance Monitoring and Reporting

• Port Utilization• Frame Volume• Errors• QoS Threshold Exceptions• Latency and Availability

– Alarm Surveillance and Fault Reporting• Real-time critical and major alarms

• Available to Premium customers • Tariffed in Metro Ethernet tariff as “Metro Ethernet Reporting”• Secure passwords and ID cards provided• Enables Service Level Agreements (SLAs)

Service Comparison

Metro Ethernet “Basic”

Metro Ethernet “Premium”

• 10, 100, 1000 Mbps switched• Best-effort service • Data transport only• No port aggregation• Uses pricing “bands” to

eliminate mileage• Full-duplex 10Mbps• Fiber and metallic interfaces

• No service guarantees• Cisco 7609 & Alcatel

• 10, 20, 50, 100, 250, 500 Mbps (switched)

• Committed bandwidth with bursting option

• VOIP supported using traffic prioritization

• 802.1Q VLAN stacking supports traffic aggregation across a common port

• Uses pricing “bands” to eliminate mileage

• Full duplex 10Mbps • Fiber and metallic interfaces

• SLAs supported by CNM• Cisco 7609 only• Dedicated GigE/Fast Ethernet will be

offered in the ME tariff

Metro Ethernet Premium Availability

• Available in the following Metros: Birmingham, AL; Miami, FL; West Palm Beach, FL; Orlando, FL; Jacksonville, FL; Ft. Lauderdale, FL; Atlanta, GA; New Orleans, LA; Charlotte, NC; Raleigh, NC; Wilmington, NC; Charleston, SC; Columbia, SC; Greenville, SC; and Spartanburg, SC

• Scheduled for deployment during 2005: Louisville, KY; Nashville, TN

• Additional switch deployments will be determined by market need or “anchor tenant”

Metro Ethernet Development Strategy

• Ethernet over Copper– Will enable mid-band speeds (2Mbps, 4Mbps, 8Mbps)

• Virtual Ethernet Service– Multiple VLANs across single Ethernet port– Each can have specific QoS

• Automatic Protection Switching– Fiber switching in the event of a failure

• Carrier Class SLAs– Tightened SLAs on network availability and latency– Additional SLAs on jitter and error bits

Metro Ethernet for Resale

For more information on the GSST product for resale, contact your Local Support Manager (LSM) at 1-800-511-6555, or your Local Contract Manager (LCM)

THANK YOU!THANK YOU!