PACKET-OPTICAL CONVERGENCE:

Transcription

1 ECOC2013 MARKET FOCUS PACKET-OPTICAL CONVERGENCE: HOW TO UNLOCK THE TRUE POTENTIAL OF THE NETWORK Dirk van den Borne Solution Architect, Packet-Optical Convergence

2 WHAT IS PACKET-OPTICAL CONVERGENCE? Colored optics in the router CAPEX savings on grey interfaces, transponder boards & shelves, and OPEX on power consumption and footprint. Control and Management plane integration End-to-end service provisioning of packet and transport layer, increase interface utilization through multi-layer restoration. Multi-layer traffic engineering TE-controllers / SDN allows to route services through both packet and transport network based on application-specific constraints. 2 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

3 CHALLENGE TODAY S PACKET NETWORKS BLIND FOR THE OPTICAL TRANSPORT NMS Control Plane NMS Control Plane Packet Service lacks visibility to: available optical resources optical health optical topology optical restoration mechanisms This results in: Reduced service velocity Inefficient resilience schemes Disconnected planning processes Lower utilization of resources 3 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

4 SOLUTION THE NEW PACKET-OPTICAL NETWORK INTERWORKING CONTROL AND MANAGEMENT Multi-layer NMS integration Multi-layer control plane integration Packet Service now gains: Resource visibility Information about Shared Risk Link groups Information about L0/L1 alarm / monitoring information Which enables: Accelerated service velocity Pro-active protection Effective restoration Higher utilization of resources 4 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

5 NMS INTEGRATION: VIRTUAL TRANSPONDERS Set wavelength Turn Tx on / off Alarm correlation Transport NMS The transport NMS provides global visibility of the end-to-end transport system in order to turn on/off channels, set transmitter wavelength and provide alarm correlation. SOLUTION Virtual Transponder (VXP) allow colored router interfaces to be managed just like a native DWDM transponder. 5 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

6 PROVISIONING WAVELENGTH CIRCUITS USING CLI SOLUTION Colored interfaces can also be managed via the router CLI in a very similar way as a grey client interface. 6 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

7 WHAT IS PACKET-OPTICAL CONVERGENCE? Colored optics in the router CAPEX savings on grey interfaces, transponder boards & shelves, and OPEX on power consumption and footprint. Control and Management plane integration End-to-end service provisioning of packet and transport layer, increase interface utilization through multi-layer restoration. Multi-layer traffic engineering TE-controllers / SDN allows to route services through both packet and transport network based on application-specific constraints. 7 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

8 MULTI-LAYER TRAFFIC ENGINEERING months Old packet demand pattern New packet demand pattern CL/DL- ROADMs Routers or minutes CHALLENGE Can we efficiently re-optimize both packet and transport network topology to take into account changes in the traffic pattern? 8 Copyright 2012 Juniper Networks, Inc. Juniper Networks Confidential

9 CENTRALIZED PACKET TRAFFIC ENGINEERING Application driven routing constraints (latency, bandwidth, cost, QoS, etc..) Complete view of packet demands Centralized path computation (Maximize objective function) Optical and packet topology, as well as reservable bandwidth A B C D L M N Y Z Application-aware traffic engineering 9 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

10 CENTRALIZED PACKET TRAFFIC ENGINEERING COMBINING PACKET AND LIGHT-PATH TE Timescales Routine updates: hourly Failure scenario: sub second Centralized packet path computation Complete view of packet demands Timescales Routine updates: monthly Failure scenario: minutes Light-path topology optimization algorithm Packet path setup and teardown Current light path topology ROADM and fiber topology Light path setup and teardown SOLUTION Centralized PCE can combine light-path and packet TE to efficiently optimize multi-layer network resources. 10 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

11 WHAT IS PACKET-OPTICAL CONVERGENCE? Colored optics in the router CAPEX savings on grey interfaces, transponder boards & shelves, and OPEX on power consumption and footprint. Control and Management plane integration End-to-end service provisioning of packet and transport layer, increase interface utilization through multi-layer restoration. Multi-layer traffic engineering TE-controllers / SDN allows to route services through both packet and transport network based on application-specific constraints. 11 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

12 WHAT S HAPPENING IN THE CORE? THE PACKET-OPTICAL ARCHITECTURE (R)EVOLUTION Packet demands Packet demands Edge router Core router DWDM transponder shelve Lower CAPEX, Power & Footprint Improved Reliability & Manageability Edge router IP/MPLS core router with DWDM transponders ROADM node ROADM node CHALLENGE Technology is evolving, how can we use this in the best way to simply the network? 12 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

13 EXAMPLE: 2-PORT 100GbE COHERENT INTERFACE FOR PTX Full density with 100G DWDM Interfaces: 2 x 100G Coherent DWDM interface per PIC 400G capacity per slot on PTX5000 Leveraging proven components: State-of-the art optical performance with SD-FEC OIF compliant optical components C-Band tunable over 96 channels Support of full OTN performance monitoring Full control and monitoring via JUNOS CLI SNMP Parameter OSNR sensitivity CD tolerance PMD tolerance Wavelength grid Wavelength range Power consumption Specification 14.5 db worse-case EOL 50,000 ps/nm 100 ps DGD C-band, 96 channels 50-GHz ITU grid <300 W (worse-case) SOLUTION Packet-optical convergence at 400G per slot! 13 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

14 Pre-FEC BER Post-FEC BER TODAY: DWDM INTERFACES IN THE ROUTER PACKET-OPTICAL INTEGRATION ENABLES L1 TO L3 VISIBILITY TXP Router Client If Client If Line if 0 Loss of frame 50 ms Protection path established FEC limit Router Line if Pre-FEC BER Post-FEC BER 0 FEC limit Small performance hit during FRR* FRR threshold Optical layer protection in today s networks Transport-aware FRR in converged packet-optical networks * Depends on FRR threshold and allocated margin. SOLUTION Visibility of packet layer resilience mechanisms to the optical performance improves overall network resilience. 14 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

15 TODAY: DWDM INTERFACES IN THE ROUTER DARK FIBER TRANSPORT 1 x 100G DWDM Up to 120 km of unamplified dark fiber No inline equipment, no DWDM terminal equipment 100G coherent transceivers have an excellent power budget Coherent receiver allows for very low input powers, down to -28 dbm, due to the coherent amplification provided by the local oscillator laser. This allows for 100G dark fiber transport without any additional DWDM equipment. SOLUTION Integrated 100G coherent interfaces supports up to 120 km of dark fiber without external DWDM equipment. 15 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

16 TOMORROW: COHERENT GOES PLUGGABLE Vendor A Vendor B Lower power Lower cost SOLUTION Pluggable optics will enable plug-n-play 100G coherent IPoDWDM across a wide range of routing platforms. 16 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

17 TOMORROW: LINE-SIDE STANDARDIZATION! (1/2) Standardization and interworking between vendors is standard practice in many other industry sectors: Wireline, mobile broadband and IP networking, are all industries with plenty of examples of successful crossindustry standardization efforts. It hasn t stopped those industries from innovating! Even in optical transport there are examples of industry-wide standardization, e.g. G.709 / OTN: But this was never extended to line-side optical interop. Framing, equalization and forward error correction are not black magic standardization of high-performance optical line-side interfaces is therefore perfectly technically feasible. CHALLENGE Standardized 100G / 400G line interfaces would allow the industry to focus on solutions, not plumbing Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

18 TOMORROW: LINE-SIDE STANDARDIZATION! (2/2) Proprietary line-side optical transport can enable a timeto-market advantage in optical performance but we can t beat the laws of physics: Optical modulation formats are (close to) theoretically optimal. Forward error correction codes used in optical transport are approaching Shannon s limit. Nonlinear compensation brings only limited benefit on 100Goptimized transport systems. Optical transport is therefore at an infliction point: Around 2015 all system vendors will have more or less the same optical performance. So why further delay line-side standardization in optical transport? Claude Shannon SOLUTION Extend standardization to optical line-side interworking in order to build a true multi-layer open ecosystem. 18 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

19 SUMMARY: KEY TAKE-AWAYS 1. Packet-transport convergence enables faster service provisioning and higher network reliability due to a better visibility of the packet layer into the deployed optical resources and topology. 2. Virtual transponders integrate DWDM router interfaces into the transport NMS, allow colored router interfaces to be managed just like a native DWDM transponder. 3. A combination of transport and packet layer traffic engineering allows to efficiently adapt network resources to continuously changing traffic demands. 4. Integration of DWDM interfaces in the router enables lower CAPEX, power consumption and footprint, while improving reliability and manageability. 19 Copyright 2013 Juniper Networks, Inc. Juniper Networks Confidential

20 Dirk van den Borne