global nren architect - internet2 · 4/19/2011 · efficient video distribution legacy sonet/sdh...

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1

Kevin McGrattan Global NREN Architect

April 19, 2011


• A Look Back •  Evolution in Topologies and Architectures • What Happened? •  The Evolution of IP/Optical Networking

Architecture


•  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


•  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


•  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


•  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


•  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


•  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


•  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


•  (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


•  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?


•  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)


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.

global nren architect - internet2 · 4/19/2011 · efficient video distribution legacy sonet/sdh...

Documents