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Check out Anthony Magee's slides from his session at MPLS & Ethernet World Congress 2013
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MPLS/SDN Intersections Next Generation Access Networks at MPLS & Ethernet World Congress
1.
MPLS/SDN Intersections Next Generation
Access Networks Anthony Magee Advanced Technology – ADVA Optical Networking MPLS & Ethernet World Congress 2013
2.
Agenda • Carrier Requirements
– Current & Future • Software Defined Networking - What does it mean? • Challenges ahead in deploying… • SDN in Access Networks • MPLS/MPLS-TP in Access Networks • Explore Intersections of SDN/MPLS • SDN Next Steps & Research Activities 2 © 2013 ADVA Optical Networking. All rights reserved.
3.
Carrier Requirements 3
© 2013 ADVA Optical Networking. All rights reserved.
4.
Carrier Requirements Traditional/Current • Path
Provisioning • Static and Dynamic • Scalability Working • Protection/Resilience Standby • OAM, Fault Finding & Fault Resolution • SLA Verification/Performance Monitoring • Synchronization • Security …broadly met via Carrier Ethernet and MPLS-TP 4 © 2013 ADVA Optical Networking. All rights reserved.
5.
Carrier Requirements Requested…Predicted… • Rapid
re-provisioning & Elastic Services - Cloud Elastic Cloud • Hybrid Models (Carrier Ethernet/MPLS) • MPLS interoperation at Carrier Ethernet $$ • Latency challenges • LTE Backhaul and CoMP Air Optimisation - X2 channel delays • >1ms ~5% Hit in optimisation Courtesy: Orange • Adoption of C-RAN and BBU Pooling • Network Convergence • Converged Fixed Line and Mobile • Economy and Scale 5 © 2013 ADVA Optical Networking. All rights reserved.
6.
Carrier Requirements Requested…Predicted… •
Virtualization • Slicing of the network • Best Effort, Premium Services, Auction (on-demand) • Experimental/Development on top of „in-field‟ equipment • Virtual Functions onto common platforms • Allow easy roll-out and avoid vendor lock-in – ETSI NFV Development/Test Production • Network Simulation - VMs of Nodes, simulate behaviour at Scale Provisioning/Flexibility/Virtualization/Simulation…Software Defined Networking 6 © 2013 ADVA Optical Networking. All rights reserved.
7.
What is Software
Defined Networking? 7 © 2013 ADVA Optical Networking. All rights reserved.
8.
Software Defined Networking
Isn‟t as simple as… If Packet_Header(MidStr, 6, 3) = “00-80-EA” then Tx_Mgnt_Port(ADVA_Packet) else Tx_Network_Port(Unkown_OUI) Endif NewFlow() ReserveResources(Switch1) ReserveResources(Switch2) Createnew LabelEntry in LIB(MPLS_Switch_1 Return NewFlow() Create_ProtectionPath (Switch 1) ReserveResources(Switch2, Switch 3) Createnew_LabelEntry(MPLS_Switch_1) Createnew_LabelEntry(MPLS_Switch_2) Create_ProtectionPath (Switch 4) Return Software Defined Networking not just code to control switch or network 8 © 2013 ADVA Optical Networking. All rights reserved.
9.
Software Defined Networking
What does it mean? • Deterministic behaviour, predictable Separation of data performance, rapid and control plane convergence Flow oriented • Simplified data plane planning, global optimization, Centralized off-line analysis management & control • Secure multi-tenancy & infrastructure sharing HW abstraction and virtualization • Better machine & service mobility Network programmability • Application-driven networking Key SDN innovations: virtualization and application-level programmability. 9 © 2013 ADVA Optical Networking. All rights reserved.
10.
Deployment Challenges 10
© 2013 ADVA Optical Networking. All rights reserved.
11.
SDN in Access
Networks What are the Challenges…Technology Gaps Mobile Backhaul - Programmable Fixed Line – Adaptive SLA Model for Synchronization layer? Elastic Services • Physical & Protocol Layers • Service Level Agreement • Capability detection • QoS/OAM around user defined model • Discovery of clock references • not a topology parameter • Frequency signals & Time Protocols • OAM tools need to be • Analogue/HW as well as protocol adaptive, scalable, programmable problem • Avoid over-dimensioning/ Cost/Volume • Clock Budget - Performance over • Flow Based Fault Finding Tools need number of hops into Path decision making to be adaptive • Physical layer Vs Packet Layer • VCCV/Connectivity Check, Loopback Reflectors compliment service demand • SDN to associate different layers – physical/packet • SDN to support OAM/SLA reservation and management – as well as service If PTP devices are meant to be Syntonized (Frequency locked) with SyncE, Path divergence needs to be detected and corrected. PTP 1588 Flow PTP Flow Asymmetry needs to be detected, and corrected SyncE Clock Signal Syntonized Syntonized Tools like OpenFlow are beginning to consider QoS, but still some way to go… 11 © 2013 ADVA Optical Networking. All rights reserved.
12.
MPLS/MPLS-TP in Access
Networks Strengths & Challenges • MPLS Strengths • Well defined, widely adopted in other parts of the network • Control Planes entrenched in core • Unrealistic to expect/want a clean slate (SDN) approach to disrupt • Challenges - MPLS/MPLS-TP in the Access Network Footprint/Power/Cost Operational Model Access Core Smaller/Simpler/Lower Cost/Power limited Devices Repair/Replace Model different from Aggregation/Core - Need for a control plane? - Plug n Play - Optimised Control Plane, Interop? - Training of field workforce to cope with scale Latency Synchronization MBH Air Interface – CoMP and X2 Channel Delay – Latency sensitive Synchronization in MPLS networks is still a challenge - Drive forwarding decisions on lowest layers and simple topology - TICTOC in IETF working towards on-path support i.e. Transparent Clock - MPLS/TP sit too far into header to optimise - Still not a complete solution - Simple network unlikely to benefit from MPLS/TP - Correlation of clock issues between physical and protocol layers MPLS & MPLS-TP do not deliver all of the needs of the Access Network 12 © 2013 ADVA Optical Networking. All rights reserved.
13.
Intersections of SDN
and MPLS 13 © 2013 ADVA Optical Networking. All rights reserved.
14.
SDN & MPLS
Intersections OpenFlow as one implementation of SDN Concept • MPLS-Enabled OpenFlow Switch • OpenFlow in WDM-PON OLT • Carrier Ethernet functions & MPLS • OLT analogous to DSLAM Interop at Carrier Ethernet $$ • DSLAM as a BRAS/BNG • Carrier Ethernet Access facing interfaces • Distributed BRAS Function • MPLS Shim layer in Hardware • OLT with OpenFlow & OpenBRAS • OpenFlow Controller MPLS Control Plane Wrapper Carrier Access Ethernet Facing Module OpenFlow WAN Controlled Facing OpenFlow MPLS Pipelines Module MPLS-Enabled OF Switch http://www.fp7-sparc.eu/assets/publications/22-ONS2012- SparcA1_ONS2012_poster_09.pdf 14 © 2013 ADVA Optical Networking. All rights reserved.
15.
Where Might Intersections
Arise? • Access Network Edge! • SDN Access Network – where services originate and are delivered • SDN management layer interaction with Control Plane • Path requests - Access node to remote Access node • SDN Path detection/provision in the access > causes MPLS path request • MPLS Control Plane to handle path provision across the MPLS core • Seamless Access SDN with MPLS Aggregation/Core • Results in MPLS hand-off from the Access SDN to MPLS Control Plane API Function Ethernet Access Edge MPLS Core CPRI/dRoF SDN Gate way Ethernet/QinQ/MPLS/IP Programmable MAC/VLAN/PBB & MPLS to MPLS Mapping 15 © 2013 ADVA Optical Networking. All rights reserved.
16.
SDN in Access
& SDN Optical Layer with MPLS on top • SDN based Optical bypass underpinning MPLS Core • Proven use cases – OFELIA project – EU FP7 • SDN in Access network, SDN in Optical Layer & MPLS on top • Working in orchestration • Depends on - Control Plane, SDN Controllers, APIs • Communication through Open Interfaces SDN to MPLS Control Plane API Function Ethernet MPLS Core Access Edge CPRI/dRoF SDN Gate Optical network way Ethernet/QinQ/MPLS/IP SDN/OpenFlow based Optical Bypass – underpinning/optimising MPLS Core Programmable MAC/VLAN/PBB & MPLS to MPLS Mapping 16 © 2013 ADVA Optical Networking. All rights reserved.
17.
SDN Next Steps
& Research 17 © 2013 ADVA Optical Networking. All rights reserved.
18.
Software Defined Networking
Steps to get there ... Extend SDN technologies into the optical/Access domains Enable interworking with IP/MPLS networks Define open northbound interface Provide framework for virtualization of SDN domains Address open architecture questions (e.g. allocation of discovery, OAM, protection & timing) 18 © 2013 ADVA Optical Networking. All rights reserved.
19.
Software-Defined Networking Collaboration
& Research Standards Collaborations, Trials, Ecosystem Network Architectures/Studies SDN Applications Emergence 19 © 2013 ADVA Optical Networking. All rights reserved.
20.
Key Messages
Access Networks – Programmability/User Defined/Adaptive SDN & MPLS Approach each have deployment challenges SDN in Access Compliments MPLS Aggregation/Core SDN Concepts Demonstrated in Optical Domain – OFELIA Software Defined Networking in the Access is on it’s way… 20 © 2013 ADVA Optical Networking. All rights reserved.
21.
Acknowledgements: This work
was supported by the European Commission under the Seventh Framework Programme (FP7) by the project COMBO and project IMPACT under the Piano+ initiative, which is an ERANET+ project and part of the European Commissions 7th Research Framework Programme (FP7). Thank you amagee@advaoptical.com IMPORTANT NOTICE ADVA Optical Networking is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited. The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA Optical Networking shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation. Copyright © for the entire content of this presentation: ADVA Optical Networking.
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