Transcript Service Convergence over TDM Access Networks using

Carrier Ethernet-Based Converged Services
Infrastructure using Ethernet over PDH
Enables new capabilities over ubiquitous T1/E1 Access Networks
Ralph Santitoro
Director of Carrier Ethernet Solutions
[email protected]
October 15, 2007
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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Market Opportunity for Ethernet over
Copper PDH Access Networks
Source: Vertical Systems Group
Over 86% of businesses do not have access to Fiber
These businesses typically have 1 to 2 DS1s used for:
Internet Access, VoIP and IP VPN
Bandwidth is growing but sub-10Mbps appears to be the “sweet spot”
These business locations often part of a multi-site enterprise
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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What is Ethernet over PDH (EoPDH)?
PDH (Plesiochronous Digital Hierarchy)
Term to collectively refer to DS1/DS3 and E1/E3 circuits
The ‘copper’ electrical circuits in the digital hierarchy
Leverages benefits of Ethernet to deliver converged
services over PDH access network (DIY or Managed Service)
Site-to-site and multi-site ‘hub and spoke’ Layer 2 VPNs
Frame Relay migration and replacement
Ethernet Access to IP services
Internet Access, IP VPNs, IP Telephony (VoIP)
Service Bandwidth Options (technology dependent)
Up to 12Mbps (8 bonded DS1s) or 24Mbps (16 bonded DS1s)
Up to 16Mbps (8 bonded E1s) or 32Mbps (16 bonded E1s)
Up to 32Mbps (1 E3)
Up to 45Mbps (1 DS3)
Ethernet over PDH (EoPDH) also referred to as
Ethernet over TDM (EoTDM) or Ethernet over Serial
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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Two technologies used to deliver EoPDH
PPP/MLPPP/BCP-based EoPDH (RFC1990 / RFC3518)
for encapsulation, bonding and bridging
GFP/VCAT/LCAS-based EoPDH (ITU-T G.8040)
GFP (G.7040) for encapsulation,
VCAT (G.7041) and LCAS (G.7042) for bonding
Device support
EoPDH Aggregation Devices
MLPPP/BCP-based EoPDH aggregation supported by:
PDH interface and protocol processor add-in cards for routers
New EoPDH edge aggregation devices
GFP-based EoPDH aggregation supported by:
EoPDH add-in cards for Multiservice Provisioning Platforms (MSPPs)
CPE Devices
MLPPP/BCP-based EoPDH supported on most CPE WAN routers and IADs
GFP-based EoPDH supported on new types of CPE devices
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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How is EoPDH Deployed ?
Untagged or
C-VLAN-tagged
Ethernet Frame
Enterprise
or Cell Site
RAN
T1,
Bonded
T1s or T3
EoPDH
CLE
Microwave
Backhaul
Provider
Channelized
DS3s
IEEE 802.1ad S-VLAN
Tagged Ethernet Frame
Ethernet
Transport
Network
EoPDH
Aggregator
LEC
IP
IP
ETH
IP
ETH
IP
ETH
PPP
PPP
ETH
Ethernet Frames enter EoPDH CLE device and encapsulated
Into PPP/MLPPP for transport over PDH network
LEC multiplexes DS1s into channelized DS3 circuits or Microwave Backhaul
provider transports DS1 circuit data
DS1s or channelized DS3 circuits terminated on EoPDH Aggregator
DS1s extracted from chDS3s, MLPPP terminated and Ethernet Frames reconstructed
EoPDH preserves original Ethernet 802.1Q tagged frame, adds IEEE 802.1ad
S-VLAN tag (QinQ) and passes to Ethernet Transport or IP/MPLS Network
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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Why Ethernet over PDH ?
Enables new Ethernet-based services
Over existing Copper PDH Access Network Facilities
with no speed or distance limitations
T1s are the most widely deployed access network technology for
businesses data networking in North America
Fits within Provider’s existing network/business operations
In many cases, can use existing CLE devices
Fits within existing T1 Internet access service infrastructure & NOC
Simplifies Access/Aggregation Networks
Terminates TDM PDH circuits as close to subscriber as possible
Subscriber IP traffic is “backhauled” over Ethernet transport network
Layer 2 VPN switching performed locally as needed
Deploy fewer, larger routers at the IP service edge
Lower cost (CapEx) Ethernet switching and transport used
at Central Offices or Co-location Facilities
Resulting in a Simplified Network Architecture
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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Which EoPDH approach and why?
MLPPP/BCP-based EoPDH Solution
Used for Retail Service Delivery of Ethernet and IP services
Service providers have widely deployed base of CLE WAN routers
and IADs that use MLPPP that can support BCP
They just enable BCP via configuration change on the device
Used for Wholesale Service Delivery
Backhaul of CDMA IP RAN equipment over DS1s/E1s
WCDMA / UMTS R5 & R6 and CDMA 1xEVDO use MLPPP
GFP/VCAT/LCAS-based EoPDH Solution
Used for Wholesale Service Delivery
Backhaul of IP-based RAN equipment with Ethernet output
Bonds up to 16 DS1s/E1s addressing higher BW requirements
Enables a common protocol suite to be used across an Ethernet
over SONET/SDH transport network
Both approaches provide different benefits and
depend upon the application to be supported
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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Ethernet over PDH Solution Summary
- North American Example
EoPDH for Aggregation of Retail Ethernet and IP Service Delivery
LEC
Enterprise
Router, IAD or
EoPDH CPE
chDS3s
EoPDH
Aggregation
Ethernet
Transport
Network
Internet,
VoIP,
IP VPN
IP Service
Networks
Central Office or
Co-location facility
EoPDH for Aggregation and Backhaul of Mobile IP RANs
LEC
EoPDH CPE
IP RAN with
Ethernet output
CDMA IP
RANs with
PDH output
chDS3s
EoPDH
Aggregation
Ethernet
Transport
Network
Mobile
Switching
Center
Wireless Hub Site
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com
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