Metro Ethernet and Related Services

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Metro Ethernet &

Related Services

By Anuradha Udunuwara

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Agenda

• Introduction to Data Services Section• Metro Ethernet Technology• SLT Metro Ethernet Services• SLT Metro Ethernet Network

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Introduction to Data Services Section

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Organizational structure

Team Leader

Eng/DS_SP Eng/DS_OP Eng/DS_Mtce

HS/DS & VoIP

HD/DN & IP Services

CEO

Team Leaders Team Leader

ServiceProvisioning

Team

Operation Teams

Maintenance Team

CMO

Eng/DS_NW

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• Local Leased Circuits [ Point to Point -PP]

• Internet Leased Line [ ILL ]

• International Private Leased Circuits [ IPLC ] –Local Extension

• Direct Inward/Outward Dialing[ DIOD ]

• IP VPN Last mile access

• Metro Ethernet

Data Services provided by SLT

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Data Networking - Typical ArchitectureSLT Managed Leased Line Network

Site-2

Site-1Site-3

Site-4

Data Node1

Data Node -2

Data Node -6

Data Node 3

Data Node -5

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Data Network

Router Router

DSU DSU

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Metro Ethernet Technology

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Types of Networks;

1. Local Area Network (LAN)

2.Wide Area Network (WAN)

3.Metropolitan Area Network (MAN)

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• A group of computers and network communication devices interconnected within a geographically limitedarea, such as a building

• Characterized by,

• Transfer data at high speeds

• Exist in a limited geographical area

• Resources are managed by the company running the LAN.

Local Area Networks (LAN)

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Switch/Hub

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• Interconnects LANs

• Characterized by,

• Transfer data at low speeds

• Exist in an unlimited geographical area

• Interconnects multiple LANs

• Connectivity and Resources are managed by a Telephone Company

Wide Area Networks (WAN)

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– High Speed Connectivity (10,20,50 Mbps….)• Point to Point Data Connectivity• Network Connectivity• Internet Connectivity

– Better Service Levels• Network availability - 99.999% (Can go out of service only

5.256 minutes per year)• Ring Access Networks• Highly available Data Nodes• Fast network resiliency

Customers say they need;

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– New and enhanced Services• LAN interconnections• Virtual Private LAN Services (VPLS)• Enhanced QoS (Quality of Service)

– Cost Effectiveness• Multiple Services on a single port• Cheap Services – particularly at higher speeds

Customers say they need;

Can we deliver these in the current Network ?

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Why Ethernet ?

- Most common Interface today- Cost effective - Supports very high Bandwidths (upto 1Gbps)- Flexible upgrades within a wide range (1Mbps to 1Gbps)

- Easy and simple to manage and maintain

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Ethernet as a Service

• Ethernet’s origins in the Enterprise– Used as a LAN connectivity technology– Just plug it in and start using it

• Ethernet’s new usage as a Service– Requires “service attributes” like other MAN /

WAN services• Ethernet UNI, Ethernet “VC”, Service Performance, etc.

Same Ethernet technology just used in a new waySame Ethernet technology just used in a new way

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Let’s look at TDM and other L2 Services

Inflexible Bandwidth Scalability• Increasing non-Ethernet service

bandwidth often requires:– New service (step function)

• T1 T3, FR ATM– New hardware

• new interface or equipment– New service provisioning

• different protocols / technologies• Often resulting in:

– Oversubscribing to meet growing bandwidth needs

OC-48

OC-12

OC-3

T3

T1

1.5M 45M 155M 622M

TDM hierarchy or L2 Service dictates

bandwidth increments and technology

Frame Relay

POS

ATM

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Ethernet Service Benefits over TDM/other L2 Services

Flexible Bandwidth Scalability• Increasing Ethernet service

bandwidth:– Requires just bandwidth provisioning– Provision only amount of BW needed

• Same protocol for LAN and MAN• Lower OpEx & CapEx with Ethernet

– 25-40% lower cost than• TDM, Frame Relay, ATM interfaces1

– 10x lower cost• than high speed SONET interfaces1

– Easier and less costly to meet growing bandwidth needs

OC-48

OC-12

OC-3

T3

T1

1.5M 45M 155M 622M

Ethernet provides flexible bandwidth

increments using same technology

Frame Relay

POS

ATM

1GbE

10/100MbE

1 Source: Network Strategy Partners, LLC

Ethernet

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Services Definition

MetroMetroEthernetEthernetNetworkNetwork

CustomerCustomerEquipmentEquipment

(CE)(CE)

User NetworkUser NetworkInterfaceInterface

(UNI)(UNI)

Service ProviderService ProviderResponsibilityResponsibility

Service Model: Services described as seen by CE, UNI to UNIService Model: Services described as seen by CE, UNI to UNI

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Ethernet Service – Basic Model defined in MEF

• Customer Equipment (CE) attaches to UNI

• CE can be – router– IEEE 802.1Q bridge (switch)

• UNI (User Network Interface)– Standard IEEE 802.3 Ethernet PHY

and MAC– 10Mbps, 100Mbps, 1Gbps or 10Gbps

• Metro Ethernet Network (MEN)– May use different transport and

service delivery technologies• SONET/SDH, WDM, RPR, MAC-in-MAC,

Q-in-Q, MPLS

CE

CE

CE

UNI

Metro Metro Ethernet Ethernet Network Network (MEN)(MEN)

UNI

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L1, L2

• Connection Oriented• Circuit Switched

Ex:-TDM, ATM, FR

• FR and ATM have a VC identifier. Therefore, we do not have to create labels.

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L3

• Connectionless• Packet Switched

Ex:-IP

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L2 & L3

• Traffic is switched• Control signal is routed

Ex:-IP/MPLS

• Ethernet does not have a label. Therefore, we have to create labels. We use MPLS.

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Why MPLS for Ethernet Services (EoMPLS)?

• More Scalable (Free label Space)• Sub 50msec resiliency (MPLS Fast Reroute)• Traffic Engineering (RSVP-TE)• Hierarchical QoS (HQoS)• Easy and simple to operate and maintain

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Traffic

Service

Ethernet Service Switch

Physical Network

Ethernet over MPLS over Ethernet

MPLS

Ethernet

Physical

IP

Ethernet

MPLS or GRE

.1q

GE,10GE etc.

Outer label

Service label=VC label=inner label

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Outer label 1

Ethernet

Inner label

Ethernet

Inner label

Outer label 2

Ethernet

Inner label

Outer label 3

Ethernet

Inner label

Outer label 4

EthernetEthernet

A E

D

C

B

Ethernet Ethernet

MPLS

LDP signaling session (TCP port 646)

RSVP-TE signaling

Ethernet frame: Get me to the other side

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Multiple Services on single port- IP-VPN access- Layer 2 VPN services (VPLS)- High Speed Data Links (LAN interconnections)- High Speed Internet

- Single Port

PE

CPEIP-VPN

High Speed Internet

VPLSHigh Speed Data

SLT Metro Ethernet Network

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Reliable Access


PE

Ethernet Connection

SiSi

Access Ring(1Gbps)

Core Ring(10Gbps)

- Customers are now seeking network availability requirements like 99.999% (5.256 minutes/year down time)

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A E

D

C

B

Primary Path

Secondary Path

Detour Path

1

23

- The switchover from the working link to the protection linkwill happen within sub 50ms to ensure that no impact onreal time applications

- MPLS (Multi Protocol Label Switching) with MPLS Fast Reroute enables this feature

High Speed Resiliency

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QoS

• Latency (delay)• Jitter (variation in delay)• Packet loss

SLA

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Enhanced Quality of Service (QoS)

Reserve 8 Mb/s

Reserve 2 Mb/s

Reserve 2 Mb/s

Reserve 4 Mb/s

16 Mb/s

Priority 01 - voice

Priority 02 - video

Priority 03 - Data

Priority 04 - Internet

• Installed SLA– Voice 2 Mb/s– Video 2 Mb/s– Data 4 Mb/s– Internet 8 Mb/s– TOTAL=16 Mb/s required

• Actual usage– Voice 1 Mb/s– Video 1 Mb/s– Data 4 Mb/s– Internet 10 Mb/s– TOTAL = 16 Mb/s used

• In SLT Metro Ethernet, the low priority traffic can burst when the high priority traffic is not available

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SLT Metro Ethernet Services

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Ethernet Service

• MEF has defined 2 Ethernet Service Types

– Ethernet Line (E-Line) Service• Provides Point-to-Point connectivity

– Ethernet LAN (E-LAN) Service• Provides Multipoint-to-Multipoint (Any-to-Any)

connectivity

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Ethernet Line Service (ELINE)

ELINEELINE

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ELINE Service Multiplexing

• In this example a single site has multiple ELINE connections to other sites multiplexed over a single UNI.

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Ethernet LAN Service (ELAN)

• Service is Multipoint-to-Multipoint fully connected

ELANELAN

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The simplicity of SLT Metro Ethernet model

Customer Router or Switch High Speed Ethernet on Fiber or Copper


Customer Location

SLT IP/VPN

High Speed Internet

SLT Internet Data Center

Point-to-Point

MultiPoint-to-MultiPointPoint-to-Multipoint

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• Typically required to connect;- Headquaters Building (Main Link)- Dissaster Recover Centers (DRC)

(LAN interconnections)

High Speed Data Links

Metro Ethernet

LAN interconnection

Head QuartersDRC Site

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Customer ALocation 1

Customer ALocation 2

Virtual Leased Line – VLL(Point–to–Point)

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Head QuartersSLT Metro Ethernet Network

Virtual Switch

Branch 1

Branch 2

Virtual Private LAN Service – VPLS(Point–to–Multipoint & Multipoint–to–Multipoint)

- Customer feels like remote offices are connected to the same LAN

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HQ

BR2BR1

SLTNetTelephone

Telephone

Internet FTP Server Video Server

Internet

FTP Client

Video Client

Video Client

Internet

HQBR

VLL

VPLS

Example

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VPN Access

- Metro Ethernet is used as the Access Network

Existing IP/MPLS BackboneSLT Metro Ethernet

Network

IP-VPN

SiSi

VPN Access

Edge Router

M-Agg

Branch A

Branch B

Branch C

Head Quarters

IP-VPN

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• Applications;- Web browsing- Hosting applications- Video Straeming- Multimedia- Cyber Cafe

High Speed Internet Links

SLT Metro

Ethernet Network

Internet

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Customer ALocation

Customer CLocation

Public Internet

SLT IP/VPN

Customer BLocation


SLT Internet Data Center

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• Available Speeds;- From 1 Mbps to 1000Mbps (1Gbps)

• Low Speeds (proposed);- 1, 1.5, 2, 3, 4, 5, 6, 8, 10Mbps

• High Speeds (proposed); - 10, 15, 20, 25, 30, 34, 40, 45, 50, 70, 100,

155, 200, 300, 400, 500, 700, 1000Mbps

Available Speeds

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SLT Metro Ethernet

The Provider Edge – “Metro Ethernet Switch” is installed in the customer premises to provide “Metro Ethernet services”

Ethernet Connection

Provider Edge (Metro Ethernet Switch)

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SLT Metro Ethernet

Ethernet ports are made available in the customer premises, to connect with other remote locations

Head Office

Branch Office A

Branch Office C

Branch Office BSLT Metro Ethernet Network

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Port types

• Access Port– 10/100/1000 Mbps– No IP address

• Network Port– 1/10 Gbps– Has IP address

1/1/1

1/1/10

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D

C

E A

B

10GE OPTICAL FIBER RING

GE OPTICAL FIBER RING

SLT Metro Ethernet Network architecture

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HK

MD

KPT

CEN

SI

Existing IP/MPLS Backbone

M.Agg=Metro Aggregation Switch

PE=Provider Edge

Internet Router

Internet

GE access rings

GE access rings

GE acce

ss rin

gs

GE access rings

GE access rings

10GE aggregation ring

GE

M.Acc=Metro Access Switch

GE

GE

GE

GE

GE

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MEN PROJECT IMPLEMENTATION10 G -Aggregation Ring

CEN, SI,KPT,HK, &MD

1G – Access RingsTotal No of Access Rings - 14

1. Central -052. SI -033. KPT -044. HK -015. MD -01

Total No of Buildings -90

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Buildings to be connected

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Buildings to be connected

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Summary

“SLT Metro Ethernet” brings the Network Provider Edge to the door step of the customer to deliver cost effective, high speed, scalable, reliable and multi-serviceEthernet Access to the customers through the sate-of-the-art MPLS technology

Documents

Metro Ethernet and Related Services