View
212
Download
0
Embed Size (px)
Citation preview
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 1
Carrier Ethernet-Based Converged Services Infrastructure using Ethernet over PDH
Enables new capabilities over ubiquitous T1/E1 Access Networks
October 15, 2007
Ralph SantitoroDirector of Carrier Ethernet Solutions
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 2
Market Opportunity for Ethernet over Market Opportunity for Ethernet over Copper PDH Access NetworksCopper PDH Access Networks
Over 86% of businesses do not have access to FiberThese businesses typically have 1 to 2 DS1s used for:
Internet Access, VoIP and IP VPNBandwidth is growing but sub-10Mbps appears to be the “sweet spot”
These business locations often part of a multi-site enterprise
Source: Vertical Systems Group
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 3
What is Ethernet over PDH (EoPDH)?What is Ethernet over PDH (EoPDH)?
PDH (Plesiochronous Digital Hierarchy)Term to collectively refer to DS1/DS3 and E1/E3 circuitsThe ‘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 VPNsFrame 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 PDH (EoPDH) also referred to as Ethernet over TDM (EoTDM) or Ethernet over SerialEthernet over TDM (EoTDM) or Ethernet over Serial
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 4
Two technologies used to deliver EoPDHTwo 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 supportEoPDH 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 DevicesMLPPP/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 5
How is EoPDH Deployed ?How is EoPDH Deployed ?
Ethernet Frames enter EoPDH CLE device and encapsulatedInto PPP/MLPPP for transport over PDH network
LEC multiplexes DS1s into channelized DS3 circuits or Microwave Backhaul provider transports DS1 circuit dataDS1s 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
LECLECEoPDH
CLEEoPDH
Aggregator
Untagged or C-VLAN-taggedEthernet Frame
ETH
IP
IEEE 802.1ad S-VLAN Tagged Ethernet Frame
ETH
IP
MicrowaveBackhaul Provider
Enterprise Enterprise or Cell Site or Cell Site
RANRAN
Ethernet Ethernet Transport Transport NetworkNetwork
Channelized DS3s
IPETHPPP
T1, Bonded
T1s or T3
IPETHPPP
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 6
Why Ethernet over PDH ?Why Ethernet over PDH ?
Enables new Ethernet-based servicesOver 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 operationsIn many cases, can use existing CLE devicesFits within existing T1 Internet access service infrastructure & NOC
Simplifies Access/Aggregation NetworksTerminates TDM PDH circuits as close to subscriber as possible
Subscriber IP traffic is “backhauled” over Ethernet transport networkLayer 2 VPN switching performed locally as needed
Deploy fewer, larger routers at the IP service edgeLower cost (CapEx) Ethernet switching and transport used
at Central Offices or Co-location Facilities
Resulting in a Simplified Network ArchitectureResulting in a Simplified Network Architecture
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 7
Which EoPDH approach and why?Which EoPDH approach and why?
MLPPP/BCP-based EoPDH SolutionUsed 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 DeliveryBackhaul of CDMA IP RAN equipment over DS1s/E1s
WCDMA / UMTS R5 & R6 and CDMA 1xEVDO use MLPPP
GFP/VCAT/LCAS-based EoPDH SolutionUsed 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 Both approaches provide different benefits and depend upon the application to be supporteddepend upon the application to be supported
© Copyright 2007 Turin Networks, Inc. All rights reserved. www.TurinNetworks.com 8
Ethernet over PDH Solution SummaryEthernet over PDH Solution Summary- North American Example- North American Example
EoPDH for Aggregation of Retail Ethernet and IP Service Delivery
DS1s
LECRouter, IAD or EoPDH CPE
IP Service Networks
EoPDH Aggregation
chDS3sEnterprise
DS1s or DS3
Central Office or Co-location facility
Internet, VoIP,
IP VPNEthernet
Transport NetworkDS1
EoPDH for Aggregation and Backhaul of Mobile IP RANs
DS1s
LECEoPDH CPE
EoPDH Aggregation
chDS3sDS1s or
DS3
Wireless Hub Site
Mobile Switching
CenterEthernet
Transport NetworkCDMA IP
RANs with PDH output Microwave
Backhaul of
PDH Circuits
DS1s
IP RAN with Ethernet output