Upload
others
View
0
Download
0
Embed Size (px)
Citation preview
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1
Kevin McGrattan Global NREN Architect
April 19, 2011
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2
• A Look Back • Evolution in Topologies and Architectures • What Happened? • The Evolution of IP/Optical Networking
Architecture
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3
• Integrated transponders CRS
• IPoDWDM with proactive FRR
• vTXP integration with NMS
• GMPLS Support
• CTC point and click provisioning
• Service interfaces
• ROADM (multi-degree, SMR)
• Colorless / Directionless ROADM
• Tunable / pluggable optics
• 100G
• NGN 2002 GMPLS Interoperability Demonstration
• SC’04 Pittsburgh 40G OC-768 with transponders SCinet to PSC machine room over metro DWDM
• SC’09 Portland 40G OC-768 IPoDWDM NLR POP to SCinet
• SC’10 New Orleans 100GE on CRS-3 inter-booth through SCinet core
Cisco Confidential © 2010 Cisco and/or its affiliates. All rights reserved. 4
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5
• Coherent Transmission
• 40G & 100G
• Advanced Modulation Schemes
• CP-DQPSK
• Improving Amplifiers
• MAL-less EDFA
• Raman amplification
• Flex Spectrum ROADM
• Removes restrictions on channel spacing and modulation format
• Reduces NLE due to wavelength interactions (XPM, FWM)
100 Gbps
400 Gbps
1 Tbps
100 Gbps
1 Tbps
100 Gbps
Long spans Sparse add/drop OSNR Limited
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6
• Regional ring or mesh topology
• Multi-purpose Aggregation
• K-12, Community College, Higher Education
• Public Safety, Public Service
• Local, County, State Government connectivity
• Legacy Connections
• TDM, T1, fractional T1, dial
• Non-business class DSL and cable
• Migrate to broadband packet based services
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7
• Packet-Optical Transport System (P-OTS)
• Standards-based MPLS Transport Profile Transport Profile
• MPLS-TP
• Integrates the following technologies:
• MPLS-TP, Ethernet, DWDM and optical transport network (OTN)
• Advantages
• Unique architecture with remote managed satellite units
• Compact, energy-efficient form factor
• Outstanding GE and 10 GE port density
• Integrated A-to-Z management for packet and transport
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8 8
Scalability & Simplicity
CPT-200 with CPT-50
Access Routers
FE/GigE 1
2
11
CPT-200 with CPT-50
FE/GigE
1 2 11
CPT-200 with CPT-50
1 2 11
CPT-200 with CPT-50
FE/GigE 1
2
11
MultiService DWDM
CPT-600
Services Aggregates Access Routers L2VPN – VPWS, VPLS Services Efficient Video Distribution Legacy SONET/SDH on different wavelength
4 x 10 GigE UNI
Degrees of Freedom Access Agnostic – TDM, ATM, Ethernet Scalability – MPLS Label Space Granularity – 1 Mbps – 10000 Mbps Topology – Mesh, Ring, Linear MPLS-TP inherently multipoint
Simplicity Transport Operational Model 50-ms Network Resiliency Access Redundancy (LAG) A-Z LSP/PW provisioning A-Z Connectivity Checks, OAM MPLS-TP Fault Propagation
Transport Integration DWDM Integration Dark Fiber IP/MPLS Integration
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9
• ROADM Technology
• High channel density and SMR
• Multi-degree
• Colorless
• Directionless
• Intelligent Optical Control Plane
• End-to-End Circuit Provisioning and PM
• Network level alarm correlation
• DWDM aware Control Plane - WSON
• Automated end-to-end provisioning accounting for DWDM specific parameters
Oakland
Fremont
Pleasanton San Francisco
Burlingame
Hayward
Santa Rosa Fairfield
A
B C D
A B
C D
San Jose
Palo Alto
Berkeley
Short spans Dense add/drop OSNR Limited
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10
• Impairment aware control plane • Linear Impairments (power loss, CD, PMD, OSNR) • Non-linear Effects (SPM, XPM, FWM) • Interface Characteristics (bit rate, FEC, modulation format) • Regeneration Capability
• Client interface registration • Alien wavelength (open network) • Transponder (closed network) • ITU-T interfaces (segmented network) • OIF-UNI
• Wavelength on demand (Zero planning wavelength setup) • Bandwidth addition on the same connection • New connection setup • Wavelength reroute for latency reduction
• Optical shared restoration • Network failure recovery • GMPLS-UNI
Cisco Confidential © 2010 Cisco and/or its affiliates. All rights reserved. 11
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 12
• Optical Control Plane
• Dynamic network topology discovery (node and links)
• Network resource discovery
• Traffic Provisioning on demand
• Traffic Restoration on the fly (SRLG)
• Capabilities / Awareness
• Fiber
• Wavelength
• TDM circuit
• Packet
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 13
• (automated) Overlay
• Routers peer, transport network is not visible from clients
• Setup request initiated by clients with no transport visibility
• Can lead to suboptimal path selection
• Peer Implementation (everyone knows everything)
• Routers and transport NE are peers
• End to end “LSP” setup
• Exposes complete topology, complex
• Augmented S-GMPLS (everyone knows what they are best at)
• Hybrid model (segmented optical and router domain topology)
• Border router receives routing information from optical devices and routers
• No routing information from the router region is carried into the optical region
• Logical separation on the border router
Cisco Confidential © 2010 Cisco and/or its affiliates. All rights reserved. 14
• Optical Channel is assumed to work by design with GMPLS
• Only pre-planned channels are guarantee to work
• GMPLS (as is) is not sufficient to decide whether a proposed path is feasible in the photonic domain
• No Optical Impairment Calculation
• What is “optimal” in terms of Optical Path:
• Number of Hops?
• Optical Signal Quality?
• Number of Regenerators?
Cisco Confidential © 2010 Cisco and/or its affiliates. All rights reserved. 15
• Provide routers with sufficient visibility into the optical layer • overall network can operate more efficiently
• avoid significant manual intervention
• Do not expose routers to excessive DWDM related overhead
• MPLS-TE stays separate from GMPLS (as in the overlay model) • Router will learn some of the optical layer attributes
• Data will not propagate beyond the DWDM facing interfaces of the router (segmented model)
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 16
IP NGN / Carrier Ethernet
DC/SAN SONET SDH
DSLAM / Wireless backhaul
Any Transport over DWDM
Control
Control Control
Control
Control
Control
UNI-N UNI-N UNI-N
UNI-N
UNI-N
UNI-N
UNI-N UNI-N
WSON WSON
S-GMPLS
E-NNI
Thank you.