The Experts below are selected from a list of 621 Experts worldwide ranked by ideXlab platform

Ashwin Gumaste - One of the best experts on this subject based on the ideXlab platform.

  • On control plane algorithms for Carrier Ethernet networks: Unicast, multicast provisioning and control traffic reduction
    Optical Switching and Networking, 2016
    Co-Authors: Saurabh Mehta, Sandeep Joshi, Tamal Das, Ashwin Gumaste
    Abstract:

    Abstract Carrier Ethernet systems are actively replacing SONET/SDH networks for transport of provider data. After much standardization in both the IEEE and the IETF, Carrier Ethernet has evolved as a rich Carrier-class technology. The standards do not focus on specific implementation aspects of providing guaranteed service-oriented features that are intrinsic towards successful replacement of SONET/SDH by Carrier Ethernet solutions. In this paper, we consider the engineering aspects of the Carrier Ethernet software defined control plane for provisioning, managing and maintaining services. Specifically, we propose methods for provisioning guaranteed unicast services considering the underlying network state. The problem is difficult due to the complex nature of admission control coalesced with subjective user requirement that is not easy to rationalize across a network. We also investigate the problem of sub-50 ms protection of multicast connections and propose a unique, tractable algorithm within the control plane for enabling Carrier-class multicast services. Finally, we focus on overall control traffic reduction schemes. An intuitive merging algorithm is proposed that minimizes control traffic in Carrier Ethernet domains. A simulations study extensively evaluates the proposed techniques.

  • Scalable segment routing—a new paradigm for efficient service provider networking using Carrier Ethernet advances
    Journal of Optical Communications and Networking, 2015
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Annirudha Kushwaha, Jianping Wang, Arun K. Somani
    Abstract:

    Segment routing has recently been proposed in the IETF toward making IP/MPLS networks serviceoriented while simplifying network operations. Segment routing computes paths at the source node using node identifiers and adjacency identifiers conjoined together to create a source-routed path. We propose a scalable transport paradigm as an enabler toward implementing segment routing in provider networks. We propose omnipresent Ethernet, our modification of Carrier Ethernet (which is based on source-routed, binary-routed labels embedded in an Ethernet frame), to implement segment routing. We identify some of the scalability issues of the segmentrouting proposal in the context of source-routing overhead. To absolve scalability issues of segment routing, two routing schemes that implement multidomain source-routing techniques are proposed. The hierarchical segment-routing (H-SR) scheme is proposed, which deploys a limited number of special nodes called swap nodes that are capable of label swapping to implement routing. The swap-node placement problem is formulated as an integer linear program to minimize the total routing distance within a network. Three heuristic techniques for swap-node selection based on centrality paradigms are presented. The H-SR scheme is further improved by a proposed multisegment-routing (M-SR) scheme that assumes all nodes in the network to be capable of label swapping. The H-SR and M-SR schemes are shown to significantly enhance the scalability of segment routing. A test-bed is built using Carrier Ethernet hardware to support segment routing that validates the implementation of the proposed schemes. A simulation model to evaluate the schemes from a scalability perspective and their associated trade-offs is presented.

  • demonstrating a software defined network sdn using Carrier Ethernet switch routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • OFC - Demonstrating a software defined network (SDN) using Carrier Ethernet Switch Routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • Scalable segment routing-a new paradigm for efficient service provider networking using Carrier Ethernet advances
    IEEE OSA Journal of Optical Communications and Networking, 2015
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Annirudha Kushwaha, Jianping Wang, Arun Somani
    Abstract:

    Segment routing has recently been proposed in the IETF toward making IP/MPLS networks service oriented while simplifying network operations. Segment routing computes paths at the source node using node identifiers and adjacency identifiers conjoined together to create a source-routed path. We propose a scalable transport paradigm as an enabler toward implementing segment routing in provider networks. We propose omnipresent Ethernet, our modification of Carrier Ethernet (which is based on source-routed, binary-routed labels embedded in an Ethernet frame), to implement segment routing. We identify some of the scalability issues of the segment routing proposal in the context of source-routing overhead. To absolve scalability issues of segment routing, two routing schemes that implement multidomain source-routing techniques are proposed. The hierarchical segment-routing (H-SR) scheme is proposed, which deploys a limited number of special nodes called swap nodes that are capable of label swapping to implement routing. The swap-node placement problem is formulated as an integer linear program to minimize the total routing distance within a network. Three heuristic techniques for swap-node selection based on centrality paradigms are presented. The H-SR scheme is further improved by a proposed multisegment-routing (M-SR) scheme that assumes all nodes in the network to be capable of label swapping. The H-SR and M-SR schemes are shown to significantly enhance the scalability of segment routing. A test-bed is built using Carrier Ethernet hardware to support segment routing that validates the implementation of the proposed schemes. A simulation model to evaluate the schemes from a scalability perspective and their associated trade-offs is presented.

Sarvesh Bidkar - One of the best experts on this subject based on the ideXlab platform.

  • Scalable segment routing—a new paradigm for efficient service provider networking using Carrier Ethernet advances
    Journal of Optical Communications and Networking, 2015
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Annirudha Kushwaha, Jianping Wang, Arun K. Somani
    Abstract:

    Segment routing has recently been proposed in the IETF toward making IP/MPLS networks serviceoriented while simplifying network operations. Segment routing computes paths at the source node using node identifiers and adjacency identifiers conjoined together to create a source-routed path. We propose a scalable transport paradigm as an enabler toward implementing segment routing in provider networks. We propose omnipresent Ethernet, our modification of Carrier Ethernet (which is based on source-routed, binary-routed labels embedded in an Ethernet frame), to implement segment routing. We identify some of the scalability issues of the segmentrouting proposal in the context of source-routing overhead. To absolve scalability issues of segment routing, two routing schemes that implement multidomain source-routing techniques are proposed. The hierarchical segment-routing (H-SR) scheme is proposed, which deploys a limited number of special nodes called swap nodes that are capable of label swapping to implement routing. The swap-node placement problem is formulated as an integer linear program to minimize the total routing distance within a network. Three heuristic techniques for swap-node selection based on centrality paradigms are presented. The H-SR scheme is further improved by a proposed multisegment-routing (M-SR) scheme that assumes all nodes in the network to be capable of label swapping. The H-SR and M-SR schemes are shown to significantly enhance the scalability of segment routing. A test-bed is built using Carrier Ethernet hardware to support segment routing that validates the implementation of the proposed schemes. A simulation model to evaluate the schemes from a scalability perspective and their associated trade-offs is presented.

  • demonstrating a software defined network sdn using Carrier Ethernet switch routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • OFC - Demonstrating a software defined network (SDN) using Carrier Ethernet Switch Routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • Scalable segment routing-a new paradigm for efficient service provider networking using Carrier Ethernet advances
    IEEE OSA Journal of Optical Communications and Networking, 2015
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Annirudha Kushwaha, Jianping Wang, Arun Somani
    Abstract:

    Segment routing has recently been proposed in the IETF toward making IP/MPLS networks service oriented while simplifying network operations. Segment routing computes paths at the source node using node identifiers and adjacency identifiers conjoined together to create a source-routed path. We propose a scalable transport paradigm as an enabler toward implementing segment routing in provider networks. We propose omnipresent Ethernet, our modification of Carrier Ethernet (which is based on source-routed, binary-routed labels embedded in an Ethernet frame), to implement segment routing. We identify some of the scalability issues of the segment routing proposal in the context of source-routing overhead. To absolve scalability issues of segment routing, two routing schemes that implement multidomain source-routing techniques are proposed. The hierarchical segment-routing (H-SR) scheme is proposed, which deploys a limited number of special nodes called swap nodes that are capable of label swapping to implement routing. The swap-node placement problem is formulated as an integer linear program to minimize the total routing distance within a network. Three heuristic techniques for swap-node selection based on centrality paradigms are presented. The H-SR scheme is further improved by a proposed multisegment-routing (M-SR) scheme that assumes all nodes in the network to be capable of label swapping. The H-SR and M-SR schemes are shown to significantly enhance the scalability of segment routing. A test-bed is built using Carrier Ethernet hardware to support segment routing that validates the implementation of the proposed schemes. A simulation model to evaluate the schemes from a scalability perspective and their associated trade-offs is presented.

  • field trial of a software defined network sdn using Carrier Ethernet and segment routing in a tier 1 provider
    Global Communications Conference, 2014
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Geetha Patil, Shivprasad Sonnis, Braja Nayak, Peeyush Agrawal
    Abstract:

    Software Defined Networking (SDN) has brought a paradigmatic shift in the networking industry and has led to significant benefits in the data-center and enterprise network domains. The service provider networks that form the largest segment of networking industry, are now evaluating SDN technologies for adoption. In this paper, we present a SDN framework for service provider networks and report the first field trial of SDN in a tier-1 service provider domain. The proposed SDN framework is built using Carrier Ethernet and augmented with recently proposed Segment Routing paradigm manifested through Software Defined-Carrier Ethernet Switch Routers (SD-CESRs). Carrier Ethernet on account of its distinct, programmable control plane and Segment Routing through its source routing capabilities facilitates SDN implementation. The SD-CESRs are deployed in a tier-1 service provider network in the metropolis of Mumbai. The SDN framework is extended through specific APIs to enhance revenue bearing services portfolio of the service provider and performance results from the field are shown to validate the benefits of SDN adoption.

Michael S. Berger - One of the best experts on this subject based on the ideXlab platform.

  • capacity planning for Carrier Ethernet lte backhaul networks
    Wireless Communications and Networking Conference, 2012
    Co-Authors: Aleksandra Checko, Lars Ellegaard, Michael S. Berger
    Abstract:

    With the introduction of LTE networks operators need to plan a new, IP-based mobile backhaul. In this paper, we provide recommendation on dimensioning LTE backhaul networks links using three methods: delay-, dimensioning formula- and overbooking factor-based. Results are obtained from OPNET simulations with traffic model based on traffic forecast for 2015. A delay-based approach gives recommended bandwidth for expected number of users. A dimensioning formula is proposed to calculate link bandwidth when mean value of aggregated traffic in the network is known. An overbooking factor is calculated and verified. Simulation in this work proves that Carrier Ethernet, one of the candidate technologies for mobile backhaul, protects the network from users that want to flood the network with their data and manages to keep the delay experienced by other users low.

  • WCNC - Capacity planning for Carrier Ethernet LTE backhaul networks
    2012 IEEE Wireless Communications and Networking Conference (WCNC), 2012
    Co-Authors: Aleksandra Checko, Lars Ellegaard, Michael S. Berger
    Abstract:

    With the introduction of LTE networks operators need to plan a new, IP-based mobile backhaul. In this paper, we provide recommendation on dimensioning LTE backhaul networks links using three methods: delay-, dimensioning formula- and overbooking factor-based. Results are obtained from OPNET simulations with traffic model based on traffic forecast for 2015. A delay-based approach gives recommended bandwidth for expected number of users. A dimensioning formula is proposed to calculate link bandwidth when mean value of aggregated traffic in the network is known. An overbooking factor is calculated and verified. Simulation in this work proves that Carrier Ethernet, one of the candidate technologies for mobile backhaul, protects the network from users that want to flood the network with their data and manages to keep the delay experienced by other users low.

  • Protection switching for Carrier Ethernet multicast
    2010 IEEE Globecom Workshops, 2010
    Co-Authors: Sarah Ruepp, Henrik Wessing, Michael S. Berger
    Abstract:

    This paper addresses network survivability for IPTV multicast transport in Carrier Ethernet networks. The impact of link failures is investigated and suggestions for intelligent multicast resilience schemes are proposed. In particular, functions of the multicast tree are integrated with the Carrier Ethernet transport layer, thereby optimizing the protection path with regards to delay and Quality of Experience (QoE). The proposed schemes are evaluated both through simulations and testbed experiments. Results clearly show the benefit of the integrated multicast scheme and illustrate a trade-off between recovery path length, recovery time, number of branch nodes and operational complexity. The integrated approach therefore shows significant potential to increase the QoE for IPTV users in case of network failures and recovery actions.

  • Evaluation of restoration mechanisms for future services using Carrier Ethernet
    WSEAS TRANSACTIONS on COMMUNICATIONS archive, 2010
    Co-Authors: Henrik Wessing, Anders Rasmussen, Michael S. Berger, H. M. Gestsson, Lukasz Brewka, Sarah Ruepp
    Abstract:

    In this paper, we evaluate and classify future service according to their requirements for delay, loss and bandwidth. The most demanding services include IPTV in different forms, hence IPTV is used as a representative for future services. Carrier Ethernet technologies are introduced with special focus on its OAM functionalities, and it is evaluated how IPTV performs in case of link failures on a Carrier Ethernet implementation. It is concluded that OAM update times of 10 ms is required to provide acceptable restoration performance in case of errors.

  • Towards 100 gigabit Carrier Ethernet transport networks
    WSEAS TRANSACTIONS on COMMUNICATIONS archive, 2010
    Co-Authors: Anders Rasmussen, Henrik Wessing, Jiang Zhang, Sarah Ruepp, Michael S. Berger
    Abstract:

    Ethernet as a transport technology has, up to now, lacked the features such as network layer architecture, customer separation and manageability that Carriers require for wide-scale deployment. However, with the advent of PBB-TE and T-MPLS, it is now possible to use Ethernet as a transport technology, making the use of Ethernet as a convergence layer for Next Generation Networks a distinct possibility. Triple Play services, in particular IPTV, are expected to be a main drivers for Carrier Ethernet, however, a number of challenges must be addressed including QoS enabled control plane, enhanced OAM functions, survivability and the increased bandwidth requirements of Carrier class systems. This article provides an overview of PBB-TE and T-MPLS and demonstrates how IPTV services can be realized in the framework of Carrier Ethernet. In addition we provide a case study on performing bit error rate (BER) measurements on the aggregated 100G stream.

Puneet Ghodasara - One of the best experts on this subject based on the ideXlab platform.

  • Scalable segment routing—a new paradigm for efficient service provider networking using Carrier Ethernet advances
    Journal of Optical Communications and Networking, 2015
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Annirudha Kushwaha, Jianping Wang, Arun K. Somani
    Abstract:

    Segment routing has recently been proposed in the IETF toward making IP/MPLS networks serviceoriented while simplifying network operations. Segment routing computes paths at the source node using node identifiers and adjacency identifiers conjoined together to create a source-routed path. We propose a scalable transport paradigm as an enabler toward implementing segment routing in provider networks. We propose omnipresent Ethernet, our modification of Carrier Ethernet (which is based on source-routed, binary-routed labels embedded in an Ethernet frame), to implement segment routing. We identify some of the scalability issues of the segmentrouting proposal in the context of source-routing overhead. To absolve scalability issues of segment routing, two routing schemes that implement multidomain source-routing techniques are proposed. The hierarchical segment-routing (H-SR) scheme is proposed, which deploys a limited number of special nodes called swap nodes that are capable of label swapping to implement routing. The swap-node placement problem is formulated as an integer linear program to minimize the total routing distance within a network. Three heuristic techniques for swap-node selection based on centrality paradigms are presented. The H-SR scheme is further improved by a proposed multisegment-routing (M-SR) scheme that assumes all nodes in the network to be capable of label swapping. The H-SR and M-SR schemes are shown to significantly enhance the scalability of segment routing. A test-bed is built using Carrier Ethernet hardware to support segment routing that validates the implementation of the proposed schemes. A simulation model to evaluate the schemes from a scalability perspective and their associated trade-offs is presented.

  • demonstrating a software defined network sdn using Carrier Ethernet switch routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • OFC - Demonstrating a software defined network (SDN) using Carrier Ethernet Switch Routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • Scalable segment routing-a new paradigm for efficient service provider networking using Carrier Ethernet advances
    IEEE OSA Journal of Optical Communications and Networking, 2015
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Annirudha Kushwaha, Jianping Wang, Arun Somani
    Abstract:

    Segment routing has recently been proposed in the IETF toward making IP/MPLS networks service oriented while simplifying network operations. Segment routing computes paths at the source node using node identifiers and adjacency identifiers conjoined together to create a source-routed path. We propose a scalable transport paradigm as an enabler toward implementing segment routing in provider networks. We propose omnipresent Ethernet, our modification of Carrier Ethernet (which is based on source-routed, binary-routed labels embedded in an Ethernet frame), to implement segment routing. We identify some of the scalability issues of the segment routing proposal in the context of source-routing overhead. To absolve scalability issues of segment routing, two routing schemes that implement multidomain source-routing techniques are proposed. The hierarchical segment-routing (H-SR) scheme is proposed, which deploys a limited number of special nodes called swap nodes that are capable of label swapping to implement routing. The swap-node placement problem is formulated as an integer linear program to minimize the total routing distance within a network. Three heuristic techniques for swap-node selection based on centrality paradigms are presented. The H-SR scheme is further improved by a proposed multisegment-routing (M-SR) scheme that assumes all nodes in the network to be capable of label swapping. The H-SR and M-SR schemes are shown to significantly enhance the scalability of segment routing. A test-bed is built using Carrier Ethernet hardware to support segment routing that validates the implementation of the proposed schemes. A simulation model to evaluate the schemes from a scalability perspective and their associated trade-offs is presented.

  • field trial of a software defined network sdn using Carrier Ethernet and segment routing in a tier 1 provider
    Global Communications Conference, 2014
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Geetha Patil, Shivprasad Sonnis, Braja Nayak, Peeyush Agrawal
    Abstract:

    Software Defined Networking (SDN) has brought a paradigmatic shift in the networking industry and has led to significant benefits in the data-center and enterprise network domains. The service provider networks that form the largest segment of networking industry, are now evaluating SDN technologies for adoption. In this paper, we present a SDN framework for service provider networks and report the first field trial of SDN in a tier-1 service provider domain. The proposed SDN framework is built using Carrier Ethernet and augmented with recently proposed Segment Routing paradigm manifested through Software Defined-Carrier Ethernet Switch Routers (SD-CESRs). Carrier Ethernet on account of its distinct, programmable control plane and Segment Routing through its source routing capabilities facilitates SDN implementation. The SD-CESRs are deployed in a tier-1 service provider network in the metropolis of Mumbai. The SDN framework is extended through specific APIs to enhance revenue bearing services portfolio of the service provider and performance results from the field are shown to validate the benefits of SDN adoption.

Peeyush Agrawal - One of the best experts on this subject based on the ideXlab platform.

  • demonstrating a software defined network sdn using Carrier Ethernet switch routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • OFC - Demonstrating a software defined network (SDN) using Carrier Ethernet Switch Routers in a provider network
    Optical Fiber Communication Conference, 2015
    Co-Authors: Ashwin Gumaste, Sarvesh Bidkar, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Peeyush Agrawal
    Abstract:

    We demonstrate SDN in a service provider network using adapted Carrier Ethernet Switch Routers developed based on principles of segment routing. SDN based service composition and delivery is showcased and validated.

  • field trial of a software defined network sdn using Carrier Ethernet and segment routing in a tier 1 provider
    Global Communications Conference, 2014
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Geetha Patil, Shivprasad Sonnis, Braja Nayak, Peeyush Agrawal
    Abstract:

    Software Defined Networking (SDN) has brought a paradigmatic shift in the networking industry and has led to significant benefits in the data-center and enterprise network domains. The service provider networks that form the largest segment of networking industry, are now evaluating SDN technologies for adoption. In this paper, we present a SDN framework for service provider networks and report the first field trial of SDN in a tier-1 service provider domain. The proposed SDN framework is built using Carrier Ethernet and augmented with recently proposed Segment Routing paradigm manifested through Software Defined-Carrier Ethernet Switch Routers (SD-CESRs). Carrier Ethernet on account of its distinct, programmable control plane and Segment Routing through its source routing capabilities facilitates SDN implementation. The SD-CESRs are deployed in a tier-1 service provider network in the metropolis of Mumbai. The SDN framework is extended through specific APIs to enhance revenue bearing services portfolio of the service provider and performance results from the field are shown to validate the benefits of SDN adoption.

  • GLOBECOM - Field trial of a software defined network (SDN) using Carrier Ethernet and segment routing in a tier-1 provider
    2014 IEEE Global Communications Conference, 2014
    Co-Authors: Sarvesh Bidkar, Ashwin Gumaste, Puneet Ghodasara, Saurabh Hote, Anirudha Kushwaha, Rishav Ambasta, Geetha Patil, Shivprasad Sonnis, Braja Nayak, Peeyush Agrawal
    Abstract:

    Software Defined Networking (SDN) has brought a paradigmatic shift in the networking industry and has led to significant benefits in the data-center and enterprise network domains. The service provider networks that form the largest segment of networking industry, are now evaluating SDN technologies for adoption. In this paper, we present a SDN framework for service provider networks and report the first field trial of SDN in a tier-1 service provider domain. The proposed SDN framework is built using Carrier Ethernet and augmented with recently proposed Segment Routing paradigm manifested through Software Defined-Carrier Ethernet Switch Routers (SD-CESRs). Carrier Ethernet on account of its distinct, programmable control plane and Segment Routing through its source routing capabilities facilitates SDN implementation. The SD-CESRs are deployed in a tier-1 service provider network in the metropolis of Mumbai. The SDN framework is extended through specific APIs to enhance revenue bearing services portfolio of the service provider and performance results from the field are shown to validate the benefits of SDN adoption.