Download Carrier Ethernet: The next generation network and service

Carrier Days
Carrier Ethernet:
The Next Generation Network and
Service Delivery Technology
Ralph Santitoro
Director of Carrier Ethernet Solutions
[email protected]
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
24 April 2008
1
About Turin Networks
A leading global provider of Carrier
Ethernet solutions
For wireline and wireless network operators
Turin’s iConnect solutions address the
real-world challenges of network operators
To increase network efficiency and capacity
To facilitate migration to Carrier Ethernet networks
Solutions deployed by more than 600
customers worldwide including:
Top five wireless network operators in U.S.
11 of the top 17 broadband Internet providers
Headquartered in Petaluma, California
R&D facilities in Boulder, Dallas, Boston, and
Shanghai
Sales offices throughout the world.
www.TurinNetworks.com
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
2
Contents
Network Segmentation
Fundamental Ethernet service components
Ethernet services and Ethernet access to IP services
Comparison between Ethernet L2 VPNs and IP VPNs
Why Ethernet L2 VPNs, EPL and EP-LAN services?
Ethernet/IP service delivery over PDH access networks
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
3
Network Segmentation
Metro Edge /
Aggregation Network
Access Networks
•
•
•
•
•
•
Active Fiber
PON
HFC (Cable)
PDH (E1/E3)
DSL
RAN (Wireless)
IP Service Networks
Internet
?
Transport/Transmission Organization
Voice
IPTV
IP VPN
VoD
Services Organization
Access Networks
All Layer 1 technologies. Technologies well defined and deployed
IP Service Networks
“Application/Service-aware” part of the network. Technologies well defined and
deployed. All IP/MPLS
Metro/Aggregation Network
What networking technology should be used? Carrier Ethernet
Networking Technologies have been defined to solve specific issues
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
4
Fundamental Ethernet Service
Components
UNI Access/Aggregation
E-NNI Metro Transport / I-NNI Access/Aggregation UNI
E-NNI
Network
Network
Core Network
EVC
UNI (User-to-Network Interface)
Physical interface/demarcation between service provider and subscriber
Service start/end point
NNI (Network-to-Network Interface)
Demarcation/peering point
Between service providers (E-NNI)
Between service provider internal networks (I-NNI)
Ethernet Virtual Connection (EVC)
Logical representation of an Ethernet service
Defined by association of 2 or more UNIs
Ethernet service components are independent of the Access or
Transport Network technology used to delivery the service
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
5
Example of Ethernet Service Delivery over
Different Access/Transport Technologies
Ethernet
Service Provider
UNI1 PDH (E1/T1)
E-NNIAccess E-NNI
Network Provider
MPLS Transport
Network
I-NNI
Fiber Access
Network
UNI2
10Mbps EVC
PDH Access Network
• EoPDH: 5 bonded E1s
MPLS Transport Network
• Ethernet over MPLS
Fiber Access Network
• Ethernet over Fiber (EoF)
PDH Access/Aggregation Network
UNI1: PDH access network bonds 5 E1s for 10Mbps EoPDH
E-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ)
MPLS Transport Network
802.1ad frames mapped to MPLS transport network
I-NNI: 1Gbps Ethernet over Fiber (802.1ad / QinQ)
Fiber Access Network
UNI2: 10Mbps Ethernet over Fiber (EoF)
Subscriber is unaware of the various access and transport network
technologies used to deliver this 10Mbps Ethernet Service
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
6
Comparison of Ethernet Connectivity Services
and Ethernet Access to IP Services
Ethernet Connectivity Services
Multi-site E-LAN
Ethernet Private LAN
Transparent LAN Service (L2 VPN)
VPLS (L2 VPN)
Site-to-Site E-Line
Ethernet Private Line
Ethernet Virtual Private Line (L2 VPN)
E-LAN
E-Line
Ethernet Access to IP Services
Provide Layer 2 connectivity to IP Service Networks
Ethernet access to Internet
Ethernet access to Managed VoIP service
Internet
E-Line
VoIP
Ethernet Connectivity Service: Layer 2 Service End-to-End
Ethernet Access to IP Service: Layer 2 access to IP Service
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
7
Technical Comparison of Ethernet L2 VPN and IP
VPN Services in Access Network
Ethernet L2 VPN Service
• UNI
• EVC (service) identified via VLAN ID
• CoS identified via PCP
• Forwarding on MAC or VLAN ID
Service Attribute
Customer Handoff
Service Identification
CoS Identification
Packet/Frame
Routing/Forwarding
Fault Management
Performance
Management
Service
Provider
IP VPN Service
• Port
• Service identified via IP address
• CoS identified via DSCP
• Forwarding on IP Address
Ethernet Service
Ethernet UNI
VLAN ID / EVC
PCP (or DSCP/ToS mapped to PCP)
MAC Address (E-LAN)
VLAN ID (E-Line)
Link Trace, Continuity Check (L2 Ping),
Loopbacks
Frame Delay, Frame Delay Variation,
Frame Loss Ratio, Service Availability
IP Service
Ethernet port (or PDH circuit)
IP Address
DSCP/ToS
IP Address
Traceroute, ICMP Ping
Packet Delay, Packet Delay
Variation, Packet Loss
Fundamental difference between Ethernet and IP Services is the
information used to identify, forward and process service frames
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
8
Why Ethernet L2 VPNs, EPL and EP-LAN services?
- Improved Security
Enterprises don’t want Carriers to know or
route their IP addresses for site-to-site
interconnections (VPNs)
Ethernet enables Carrier’s network to transport and
switch Enterprise IP traffic without interacting with it
EPL and EP-LAN services over NG-SDH
provides enhanced information security
SDH’s circuit channelization coupled with LCAS
diverse routes provide a data isolation and data
‘scrambling’ effect
Ideally suited for Financial verticals such as stock
exchanges, banks and government market sectors
Mitigating Carrier Ethernet Security Risks: http://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
9
Why Carrier Ethernet for Metro/Aggregation
Networks ?
Metro/Aggregation Network’s Functionality
Aggregate, switch and transport traffic from access network to IP
service edge networks
This capability is ideally suited for Carrier Ethernet
Carrier Ethernet provides simpler and lower cost OAM than
IP/MPLS
Only need to manage 1 layer versus 3 Layers with IP/MPLS
All performance and fault management accomplished via a single
technology (Ethernet)
Fault Management
Performance Management
IP
MPLS
1 Layer to
manage
Ethernet
Ethernet
OpEx
OpEx
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
3
Layers
to
Manage
10
Converged Ethernet/IP Service
Delivery over PDH Access Networks
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
11
Delivering Ubiquitous Ethernet Services
- The Access Network Challenge
Ethernet over Fiber (EoF) access networks
The optimal technology for delivery of Ethernet services
Unfortunately, not all Enterprise sites have fiber access
However, they all have access to copper PDH circuits
Fiber
Fiber
(Off net)
Fiber
(On net)
Ethernet
Service
Provider
(Off net)
Fiber
(On net)
How does a service provider deliver Ethernet
services to all Enterprise locations?
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
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What is Ethernet over PDH (EoPDH)?
Technology that enables delivery of Ethernet services over PDH
(E1/DS1, E3/DS3) access networks
Service Bandwidth Granularity
N x 2Mbps (N bonded E1s), N x 1.5Mbps (N bonded DS1s)
N x 32Mbps (N bonded E3s), N x 45Mbps (N bonded DS3s)
Example:
 5 bonded E1s provide a 10Mbps Ethernet service
 3 bonded E3s provides ~100Mbps Ethernet service
Supports same service attributes as EoF services
Ethernet UNI to subscriber
Granular bandwidth and QoS per service
Fault Management and Performance Management for SLAs
EoPDH enables a common Ethernet service offering
and SLA over both copper and fiber access networks
PDH (Plesiochronous Digital Hierarchy): Term to collectively refer to E1/E3 and DS1/DS3 copper access network circuits
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
13
How does EoPDH work?
Ethernet
Frame at UNI
Enterprise
Subscriber
Bonded
E1s/E3s
Copper PDH
Access Network
EoPDH
CLE
IP
ETH
IP
ETH
GFP
S-VLAN Tagged
Ethernet Frame (EVC)
Channelized
STM-n
Ethernet
Transport or
IP Service
Network
EoPDH
Aggregator
IP
ETH
GFP
IP
ETH
Ethernet Frames enter EoPDH CLE and encapsulated into GFP
Each C-VLAN ID can be used to identify a different service (EVC)
Access network multiplexes E1s/E3s into STM-n circuits
E1s/E3s in STM-n circuits terminated on EoPDH Aggregator
GFP terminated, Ethernet frames reconstructed
EoPDH Aggregator adds S-VLAN tag (QinQ) and passes Ethernet
Service Frames
to Ethernet Transport Network or IP Service Network
Preserves enterprise subscriber’s C-VLAN ID
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
14
Ethernet L2 Services and Ethernet Access to IP
Services over E1s PDH circuits: PMO
Customer Premise
CE
PDH/SDH
Access Network
EoPDH
CLE
SDH
ADM
Ethernet over E1s
or E1s in STM-n
Ethernet
over E1s
SDH
Ethernet handoff to customer
Local
Switching
Office
(POP)
TDM
IP Service Edge
PE
Router
L2
switch
Ethernet
PDH
Aggregation
Router
Ethernet
DCS
SDH
ADM
Ethernet over E1s
or E1s in STM-n
TDM PDH circuits from Customer Premise to IP Service Edge
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
15
FMO Step 1 in Transport Network Evolution to
Carrier Ethernet
TDM
Customer Premise
CE
PDH/SDH
Access Network
EoPDH
CLE
EoPDH
Aggregator
SDH
ADM
Ethernet over
E1s or E1s in
STMn
IP Service Edge
IP Service Edge
PE
Router
Ethernet
SDH
Ethernet
over E1s
L2
switch
Ethernet
PDH
Aggregation
Router
Ethernet
PE
Router
DCS
Ethernet over E1s or
E1s in STM-n
L2
switch
SDH
ADM
Ethernet
over
SDH
Carrier Ethernet
Ethernet handoff to customer
Local
Switching
Office
(POP)
Ethernet
EoPDH aggregator terminates PDH/SDH circuits and provides Ethernet
to backhaul network resulting in improved bandwidth utilization
DCS and PDH Aggregation Router eliminated at IP Service Edge since
PDH circuits terminated at LSO
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
16
FMO Step 2 in Transport Network Evolution to
Carrier Ethernet
TDM
SDH
ADM
Ethernet handoff to customer
Ethernet
over E1s
Converged Services
• Ethernet L2 VPNs
• EVPL and E-LAN
• Ethernet access to Internet
• Ethernet access to VoIP
Ethernet over
E1s or E1s in
STMn
Ethernet
IP Service Edge
PE
Router
L2
switch
SDH
ADM
Local
Switching
Office
(POP)
Ethernet
over
SDH
Carrier Ethernet
EoPDH
Aggregator
SDH
CE
PDH/SDH
Access Network
Managed
EoPDH
CLE
CLE
Ethernet
Customer Premise
Ethernet
SDH ADMs / Transport replaced by Ethernet Transport
Shortest possible Ethernet over E1 (PDH) loops
CLE at customer premise enables converged Ethernet and IP services
Local switching of locally attached subscribers reduces backhaul bandwidth
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
17
Ethernet over PDH Benefits
Simplifies Enterprise subscriber’s WAN connectivity
Provides “IT friendly” Ethernet (UNI) instead of E1 TDM circuit
Simplifies Provider’s Access/Aggregation Network
Reduces backhaul bandwidth requirements
By terminating TDM PDH circuits as close to subscriber as possible
Through statistical multiplexing and local switching
EoPDH enables ubiquitous, global
Ethernet services for off-net subscribers
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
18
Summary
Ethernet Services can be:
Private Line Replacement (EPL)
Private LAN (EP-LAN)
Layer 2 Connectivity Service (E-Line or E-LAN L2 VPN)
Layer 2 access connection to an IP Service (Internet, VoIP, etc.)
Carrier Ethernet is the best technology to use in the
metro/aggregation network
Because this part of the network need not be “IP aware”
Because it is simpler and lower cost than using IP/MPLS
Carrier Ethernet and IP/MPLS can both have their place in the
network
Each plays a different role in the different parts of the network
Carrier Ethernet enables the delivery of the broadest range of services
while providing the lowest cost metro aggregation network infrastructure
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
19
Recommended Reading
Metro Ethernet Services – A Technical Overview
http://www.metroethernetforum.org/PDF_Documents/metro-ethernetservices.pdf
Delivering Global Ethernet Services
http://www.turinnetworks.com/html/TechBrief_Global-Ethernet.pdf
Mitigating Carrier Ethernet Security Risks
http://www.turinnetworks.com/html/TechBrief_Ethernet-Security.pdf
Leveraging GMPLS to deliver end-to-end Ethernet services
http://www.turinnetworks.com/html/TechBrief_Leveraging_GMPLS.pdf
“Carrier Ethernet Deployment Faces Challenges, Opportunities”
http://lw.pennnet.com/display_article/308790/13/ARTCL/none/none/Carri
er-Ethernet-deployment-faces-challenges,-opportunities/
© Copyright 2008 Turin Networks, Inc. All Rights Reserved
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