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The NGN Carrier Ethernet System Technologies, Architectures and Deployment Models
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The NGN Carrier Ethernet System
NGN Carrier Ethernet System Architecture Overview
The Context of Broadband Forums TR-101
NGN Carrier Ethernet System Architecture Details
Building Blocks and Variants
Service Delivery Models
Network-based High Availability
MPLS-TP-based Aggregation
Scaling with Unified MPLS
Network Virtualization (nV) Technology
Summary
Q and A
Agenda
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NGN Carrier Ethernet System
Architecture Overview
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63 EB per mo
20 EB per mo
Entering the Zettabyte Era Global IP traffic will increase 4-fold from 2010 to 2015
81 EB per mo
50 EB per mo
38 EB per mo
28 EB per mo
Source: Cisco Visual Networking Index (VNI) Global IP Traffic Forecast, 20102015
2010 2011 2012 2013 2014 2015
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Circuit to Packet Migration
Massive change in SP traffic make-up in next 5 years*
SP revenue shifting from circuits to packet services**
5 yrs ~80% revenue derived from packet services
Packet traffic increasing at 34% CAGR***
*ACG Research 2011, ** Cisco Research 2010, ***Cisco VNI 2011
90+% IP Traffic
Private Line TDM/OTN Traffic
Private/Public IP Traffic
2011
~30-50%
~50-70%*
2013 2016
Private Line TDM/OTN Traffic
Private Line TDM/OTN Traffic
20-30% 010%
Private/Public IP Traffic
Private/Public
IP Traffic
70-80% 90+%
Legacy TDM Traffic
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Subscriber
Business
Corporate
Residential
ATM Aggregation
Edge Core Access
Policy and Service Control Plane (per subscriber)
SDH
Mobile
Optical
L2SW
L2SW L2SW
L2SW
L2SW
L2SW
L1SW
SW
L1SW
L1SW
L2SE
OLT
DSLAM L2SE
L2SE
L2SE
L2SE L3SE
L3SE
BNG
L2SE
L0SW L0SW L0SW L0 W
Aggregation Edge Boundary
Access Aggregation Boundary
Ethernet Aggregation
MPLS Ethernet Aggregation
ATM/FR networks capped and to be closed
SONET/SDH evolving to MPLS Ethernet and OTN
Access and Edge optimized for MPLS
Ethernet
Service Provider Networks Evolution to
Ethernet and
MPLS
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Cisco Carrier Ethernet Transport Architecture Technical Innovations
IPoDWDM Optical Network
Aggregation Node
Aggregation Network MPLS/IP
Carrier Ethernet Aggregation Access Edge
Aggregation Node
Aggregation Node
Ethernet Node
STB
VoD
Content Network
TV SIP
PON Node
DSLNode
Core Nodes
VoD
Content Network
TV SIP
Multiservice Core
Core Network IP / MPLS Distribution
Node
Corporate
Business
Corporate
Business
Residential
STB
Residential
Aggregation Node
Distribution Node
Mobile
2G/3G/4G Node
RAN Access Network MPLS/IP
Corporate
Business
BSC/RNC
BSC/RNC
MPLS-based transport with MPLS-TP option
Cisco ASR9000, ASR1000, ASR 903, ASR 901,
Cisco Carrier Packet Transport , CPT50, -200, -600
Flexible Ethernet Edge
Ubiquitous Ethernet UNI across different product lines and OSs
Flexible Options for Subscriber Awareness
Distributed Edge, Centralized Edge, ISG for IPv4/IPv6
Intelligent transport of video
PIM Optimizations, MoFRR, TI-MoFRR, integrated video
caching, Video Quality Monitoring
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L2 MPLS Transport
Two technologies for L2 transport over MPLS:
Ethernet over MPLS (EoMPLS)
Used for L2 point-to-point link over MPLS cloud
No MAC learning involved
Virtual Private LAN Services (VPLS)
Used for multipoint L2 connections
Collection of pseudowires tied together by a Virtual Forwarding Interface (VFI)
MAC addresses learned on VFI
Traffic forwarding based on destination MAC addresses
H-VPLS, an extension of VPLS
Ethernet VPN is a new technology for NGN L2VPN Services (not described in this breakout!)
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MPLS
EoMPLS Overview
MPLS in the aggregation network and core
Targeted LDP session between PEs to exchange VC label
Tunnel label is used to forward packet from PE to P to PE
VC label is used to identify L2VPN circuit
Attachment Circuit (AC) can be port-based or VLAN-based (or Ethernet Flow Point based, see later)
Pseudowire
Aggregation Node
P Aggregation
Node
Access Node FTTB CPE
Access Node FTTB CPE
LDP LDP
Targeted LDP
Attachment Circuit Attachment Circuit
P
Tunnel label
Ethernet PDU
VC label
Ethernet PDU
Ethernet PDU
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VPLS (Virtual Private LAN Services)
Attachment Circuit (AC)Connection to Aggregation using an Ethernet VLAN
Virtual Circuit (Pseudowire)EoMPLS tunnel between PEs using a full mesh
Virtual Forwarding Instance (VFI)A virtual L2 bridge instance that connects ACs to VCs (PWs);
VFI=VLAN=broadcast domain
RFC4761 (BGP-signalled) and RFC4762 (LDP Signalled)
Enhanced with BGP based Autodiscovery (RFC6074)
Scalability issues almost solved via H-VPLS and state-of-the-art NPU technology (2M MAC address/chip)
Aggregation
Node
MPLS
Core
VFI
VFI
VFI
Attachment
Circuit
Ethernet Port
or VLAN
Virtual Forwarding
Instance
Eompls Virtual Circuit
(Pseudowire)
Aggregation
Node
Aggregation
Node
Access Node Access Node
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http://tools.ietf.org/html/rfc4761http://tools.ietf.org/html/rfc4762http://tools.ietf.org/html/rfc6074
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IETF MPLS-TP
MPLS Transport Profile
T-MPLS requirements feeding into IETF MPLS-TP enhancements: MPLS-TP differs technologically from T-MPLS. ITU stopped work on T-MPLS.
Effort to address Pt-to-Pt ATM-like transport centric networks (like ATM PVCs)
Focused on connection-oriented (CO-PS) services
Data planebased on IETF MPLS, with restricted options
No ECMP, no PHP, no LSP merging
Control planestatic and/or dynamic
Static provisioning with NMS, with standardized common functions
Dynamic control plane based on GMPLS or IP/MPLS
Key OAM enhancements
GE-ACHGeneric Associated Channel to support FCAPS functions alongside transport MPLS LSP
GALGeneric-ACH Label as generic exception mechanism for LSP OAM
Provisioning and Management
CE CE
PE2 PE1
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Aggregation Network MPLS/IP
Dark Fibre / CWDM / DWDM and ROADM
Carrier Ethernet Aggregation
BNG
Business PE
Access Edge
Aggregation Node
DSL
Ethernet
Core
VoD
Content Network
TV SIP
Multiservice Core
Core Network IP / MPLS
Distribution Node
STB
Corporate
STB
STB
Residential
Corporate
Corporate
Business
Business
Business
Residential
Residential
2G/3G Node
PON
Architecture variants: IP/MPLS ETHERNET
IP/MPLS
IP/MPLS MPLS-TP
MPLS-TP
Cisco supports the MPLS-TP option now (CPT Product Line)
NGN Carrier Ethernet System Evolution
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NGN Carrier Ethernet Transport Direction
Characteristic SONET
/
SDH
Optical OTN
(ROADMs)
Electrical OTN
PBB-TE MPLS-TP IP/MPLS
Ethernet
Eline (10GE)
Eline (sub 10GE)
E-Tree
E-LAN
Legacy
F/R
ATM
TDM
IP
L3VPN
L3 Unicast
L3 Multicast
Content
General
Traffic Engineering
50ms restoration
Multiplexing Technology Time Division
Wave Division Time Division Statistical Statistical Statistical
UNI processing Limited None None Typically rich Typically rich Typically rich
Granularity VC-4 Lambda ODU Variable Variable Variable
Technology Maturity
Cisco focuses on IP/MPLS for the Carrier Ethernet Transport arch
