Abstract

Evolution in the field of optical networking in National Research and Education Networks led to utilization of Alien Wavelengths (AWs) and disaggregated Open Line Systems. Dynamic provisioning of AWs, in general spectrum services, is achieved via Reconfigurable Optical Add Drop Multiplexers (ROADMs) operating with flexible spectrum allocation. Northbound interface of these is usually implemented via the NETCONF protocol and through an appropriate Yet Another Next Generation (YANG) model. This paper presents a self-contained flexible spectral grid YANG model for low-level control and monitoring of a ROADM. The presented YANG model offers access to all functional components of a modern flexgrid ROADM and enables SDN applications to access and manipulate the media layer with no required external validation. The model is verified by an SDN application which implements optical path protection of AWs. A physical demonstration with model railroad intuitively shows the accomplished functionality.

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2018 (1)

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

2017 (1)

J. Vojtechet al., “Joint accurate time and stable frequency distribution infrastructure sharing fiber footprint with research network,” Opt. Eng., vol. 56, no. 2, 2017, Art. no. .

2016 (1)

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

2015 (3)

F. Paolucciet al., “Superfilter technique in SDN-controlled elastic optical networks [Invited],” IEEE/OSA J. Optical Commun. Netw., vol. 7, no. 2, pp. A285–A292, 2015.

J. Vojtech, V. Smotlacha, and P. Skoda, “Simultaneous transmission of accurate time and stable frequency through bidirectional channel over telecommunication infrastructure with excessive spans,” Proc. SPIE, vol. 9598, 2015, Art. no. .

R. Shakir, A. Shaikh, and M. Hines, “Consistent Modeling of Operational State Data in YANG,” Internet Engineering Task Force, Internet-Draft draft-openconfig-netmod-opstate-01, 2015, work in progress. 2015. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-openconfig-netmod-opstate-0 1

2010 (1)

R. Nuijts and L. L. Bjørn, “40 Gb/s alien-wavelength experiment over 1000 km of G. 655 (TWRS) transmission fiber between Amsterdam and Copenhagen,” in TERENA Net. Conf. (TNC), 2010.

2007 (1)

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

Altmannová, L.

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtěch, M. Hůla, L. Altmannová, S. Šíma, and J. Radil, “Open photonic devices and systems,” in Proc. Winter ESCC/Internet2 Joint Techs Meeting, 2010. [Online]. Available: https://meetings.internet2.edu/2010-01-JT/detail/10000964/

Bjorklund, M.

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

Bjørn, L. L.

R. Nuijts and L. L. Bjørn, “40 Gb/s alien-wavelength experiment over 1000 km of G. 655 (TWRS) transmission fiber between Amsterdam and Copenhagen,” in TERENA Net. Conf. (TNC), 2010.

Chaouch, H.

M. M. Filer, H. Chaouch, X. Wu, J. Gaudette, and J. L. Cox, “Interoperation of layer-2/3 modular switches with 8QAM/16QAM integrated coherent optics over 2000 km open line system,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper W4H.1. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-W4H.1

Cholda, P.

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

Cox, J. L.

M. M. Filer, H. Chaouch, X. Wu, J. Gaudette, and J. L. Cox, “Interoperation of layer-2/3 modular switches with 8QAM/16QAM integrated coherent optics over 2000 km open line system,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper W4H.1. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-W4H.1

Filer, M. M.

M. M. Filer, H. Chaouch, X. Wu, J. Gaudette, and J. L. Cox, “Interoperation of layer-2/3 modular switches with 8QAM/16QAM integrated coherent optics over 2000 km open line system,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper W4H.1. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-W4H.1

Gaudette, J.

M. M. Filer, H. Chaouch, X. Wu, J. Gaudette, and J. L. Cox, “Interoperation of layer-2/3 modular switches with 8QAM/16QAM integrated coherent optics over 2000 km open line system,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper W4H.1. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-W4H.1

Helvik, B. E.

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

Hines, M.

R. Shakir, A. Shaikh, and M. Hines, “Consistent Modeling of Operational State Data in YANG,” Internet Engineering Task Force, Internet-Draft draft-openconfig-netmod-opstate-01, 2015, work in progress. 2015. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-openconfig-netmod-opstate-0 1

Hula, M.

J. Vojtěch, M. Hůla, L. Altmannová, S. Šíma, and J. Radil, “Open photonic devices and systems,” in Proc. Winter ESCC/Internet2 Joint Techs Meeting, 2010. [Online]. Available: https://meetings.internet2.edu/2010-01-JT/detail/10000964/

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

Jajszczyk, A.

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

Kamalov, V.

V. Kamalovet al., “Lessons learned from open line system deployments,” in Proc. Opt. Fiber Commun. Conf. Exhib., 2017, Paper M2E.2. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-M2E.2

Karásek, M.

J. Radil, J. Vojtěch, M. Karásek, and S. Šíma, “Dark fibre networks and how to light them,” in Proc. 4th Quilt Opt. Netw. Workshop, Fort Lauderdale, FL, USA2006, p. 6.

Kellerer, W.

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

Kim, H. J.

M. K. Shin, K. H. Nam, and H. J. Kim, “Software-defined networking (SDN): A reference architecture and open APIs,” in Proc. 2012 Int. Conf. ICT Convergence, 2012, pp. 360–361.

Kuna, A.

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

Kundrát, J.

J. Kundrátet al., “Software-defined optics in last mile for research and education in the Czech Republic,” J. Commun. Softw. Syst., vol. 11, 2015. [Online]. Available: http://jcomss.fesb.unist.hr/index.php/jcomss/article/view/97/75

Lee, Y.

Y. Leeet al., “A Yang Data Model for WSON Optical Networks,” Internet Engineering Task Force, Internet-Draft draft-ietf-ccamp-wson-yang-09, 2017, work in progress. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-wson-yang-09

Liou, C.

A. Sadasivarao, D. Naik, C. Liou, S. Syed, and A. Sharma, “Demystifying SDN for optical transport networks: Real-world deployments and insights,” in Proc. 2016 IEEE Global Commun. Conf., 2016, pp. 1–7.

McGarry, M. P.

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

Mercian, A.

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

Mykkeltveit, A.

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

Naik, D.

A. Sadasivarao, D. Naik, C. Liou, S. Syed, and A. Sharma, “Demystifying SDN for optical transport networks: Real-world deployments and insights,” in Proc. 2016 IEEE Global Commun. Conf., 2016, pp. 1–7.

Nam, K. H.

M. K. Shin, K. H. Nam, and H. J. Kim, “Software-defined networking (SDN): A reference architecture and open APIs,” in Proc. 2012 Int. Conf. ICT Convergence, 2012, pp. 360–361.

Nuijts, R.

R. Nuijts and L. L. Bjørn, “40 Gb/s alien-wavelength experiment over 1000 km of G. 655 (TWRS) transmission fiber between Amsterdam and Copenhagen,” in TERENA Net. Conf. (TNC), 2010.

Paolucci, F.

F. Paolucciet al., “Superfilter technique in SDN-controlled elastic optical networks [Invited],” IEEE/OSA J. Optical Commun. Netw., vol. 7, no. 2, pp. A285–A292, 2015.

Radil, J.

J. Radil, J. Vojtěch, M. Karásek, and S. Šíma, “Dark fibre networks and how to light them,” in Proc. 4th Quilt Opt. Netw. Workshop, Fort Lauderdale, FL, USA2006, p. 6.

J. Vojtěch, M. Hůla, L. Altmannová, S. Šíma, and J. Radil, “Open photonic devices and systems,” in Proc. Winter ESCC/Internet2 Joint Techs Meeting, 2010. [Online]. Available: https://meetings.internet2.edu/2010-01-JT/detail/10000964/

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

Reis, J. D.

J. D. Reiset al., “Flexible optical transmission systems for future networking,” in Proc. 2014 16th Int. Telecommun. Netw. Strategy Planning Symp., 2014, pp. 1–6.

Reisslein, M.

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

Sadasivarao, A.

A. Sadasivarao, D. Naik, C. Liou, S. Syed, and A. Sharma, “Demystifying SDN for optical transport networks: Real-world deployments and insights,” in Proc. 2016 IEEE Global Commun. Conf., 2016, pp. 1–7.

Schoenwaelder, J.

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

Shafer, P.

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

Shaikh, A.

R. Shakir, A. Shaikh, and M. Hines, “Consistent Modeling of Operational State Data in YANG,” Internet Engineering Task Force, Internet-Draft draft-openconfig-netmod-opstate-01, 2015, work in progress. 2015. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-openconfig-netmod-opstate-0 1

Shakir, R.

R. Shakir, A. Shaikh, and M. Hines, “Consistent Modeling of Operational State Data in YANG,” Internet Engineering Task Force, Internet-Draft draft-openconfig-netmod-opstate-01, 2015, work in progress. 2015. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-openconfig-netmod-opstate-0 1

Sharma, A.

A. Sadasivarao, D. Naik, C. Liou, S. Syed, and A. Sharma, “Demystifying SDN for optical transport networks: Real-world deployments and insights,” in Proc. 2016 IEEE Global Commun. Conf., 2016, pp. 1–7.

Shin, M. K.

M. K. Shin, K. H. Nam, and H. J. Kim, “Software-defined networking (SDN): A reference architecture and open APIs,” in Proc. 2012 Int. Conf. ICT Convergence, 2012, pp. 360–361.

Sima, S.

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

Šíma, S.

J. Radil, J. Vojtěch, M. Karásek, and S. Šíma, “Dark fibre networks and how to light them,” in Proc. 4th Quilt Opt. Netw. Workshop, Fort Lauderdale, FL, USA2006, p. 6.

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtěch, M. Hůla, L. Altmannová, S. Šíma, and J. Radil, “Open photonic devices and systems,” in Proc. Winter ESCC/Internet2 Joint Techs Meeting, 2010. [Online]. Available: https://meetings.internet2.edu/2010-01-JT/detail/10000964/

Skoda, P.

J. Vojtech, V. Smotlacha, and P. Skoda, “Simultaneous transmission of accurate time and stable frequency through bidirectional channel over telecommunication infrastructure with excessive spans,” Proc. SPIE, vol. 9598, 2015, Art. no. .

Škoda, P.

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

Smotlacha, V.

J. Vojtech, V. Smotlacha, and P. Skoda, “Simultaneous transmission of accurate time and stable frequency through bidirectional channel over telecommunication infrastructure with excessive spans,” Proc. SPIE, vol. 9598, 2015, Art. no. .

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

Syed, S.

A. Sadasivarao, D. Naik, C. Liou, S. Syed, and A. Sharma, “Demystifying SDN for optical transport networks: Real-world deployments and insights,” in Proc. 2016 IEEE Global Commun. Conf., 2016, pp. 1–7.

Terpstra, M.

M. Terpstra, “SDN and Gartner's Hype Cycle,” 2015. [Online]. Available: http://www.plexxi.com/2015/01/sdn-gartners-hype-cycle/

Thyagaturu, A. S.

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

Union, I. T.

I. T. Union, “ITU-T Recommendation G.872 (01/17) Architecture of optical transport networks,” 2017. [Online]. Available: https://www.itu.int/rec/T-REC-G.872-201701-I/en

I. T. Union, “ITU-T Recommendation G.694.1 (02/12) Spectral grids for WDM applications: DWDM frequency grid,” 2012. [Online]. Available: https://www.itu.int/rec/T-REC-G.694.1-201202-I/en

Vojtech, J.

J. Vojtechet al., “Joint accurate time and stable frequency distribution infrastructure sharing fiber footprint with research network,” Opt. Eng., vol. 56, no. 2, 2017, Art. no. .

J. Vojtech, V. Smotlacha, and P. Skoda, “Simultaneous transmission of accurate time and stable frequency through bidirectional channel over telecommunication infrastructure with excessive spans,” Proc. SPIE, vol. 9598, 2015, Art. no. .

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

J. Vojtěch, M. Hůla, L. Altmannová, S. Šíma, and J. Radil, “Open photonic devices and systems,” in Proc. Winter ESCC/Internet2 Joint Techs Meeting, 2010. [Online]. Available: https://meetings.internet2.edu/2010-01-JT/detail/10000964/

J. Radil, J. Vojtěch, M. Karásek, and S. Šíma, “Dark fibre networks and how to light them,” in Proc. 4th Quilt Opt. Netw. Workshop, Fort Lauderdale, FL, USA2006, p. 6.

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

J. Vojtěch, “CzechLight & CzechLight amplifiers,” in Proc. 17th TF-NGN Zurich, Zurich, Switzerland, 2005, pp. 5–16.

Watsen, K.

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

Wilton, R.

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

Wittner, O. J.

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

Wu, X.

M. M. Filer, H. Chaouch, X. Wu, J. Gaudette, and J. L. Cox, “Interoperation of layer-2/3 modular switches with 8QAM/16QAM integrated coherent optics over 2000 km open line system,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper W4H.1. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-W4H.1

IEEE Commun. Surveys Tuts. (2)

A. S. Thyagaturu, A. Mercian, M. P. McGarry, M. Reisslein, and W. Kellerer, “Software defined optical networks (SDONs): A comprehensive survey,” IEEE Commun. Surveys Tuts., vol. 18, no. 4, pp. 2738–2786, 2016.

P. Cholda, A. Mykkeltveit, B. E. Helvik, O. J. Wittner, and A. Jajszczyk, “A survey of resilience differentiation frameworks in communication networks,” IEEE Commun. Surveys Tuts., vol. 9, no. 4, pp. 32–55, 2007.

IEEE/OSA J. Optical Commun. Netw. (1)

F. Paolucciet al., “Superfilter technique in SDN-controlled elastic optical networks [Invited],” IEEE/OSA J. Optical Commun. Netw., vol. 7, no. 2, pp. A285–A292, 2015.

in TERENA Net. Conf. (TNC) (1)

R. Nuijts and L. L. Bjørn, “40 Gb/s alien-wavelength experiment over 1000 km of G. 655 (TWRS) transmission fiber between Amsterdam and Copenhagen,” in TERENA Net. Conf. (TNC), 2010.

Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10 (1)

M. Bjorklund, J. Schoenwaelder, P. Shafer, K. Watsen, and R. Wilton, “Network Management Datastore Architecture,” Internet Engineering Task Force, Internet-Draft draft-ietf-netmod-revised-datastores-10, 2018, work in progress. [Online]. Available: https://tools.ietf.org/html/draft-ietf-netmod-revised-datastores-10

Internet Engineering Task Force, Internet-Draft draft-openconfig-netmod-opstate-01 (1)

R. Shakir, A. Shaikh, and M. Hines, “Consistent Modeling of Operational State Data in YANG,” Internet Engineering Task Force, Internet-Draft draft-openconfig-netmod-opstate-01, 2015, work in progress. 2015. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-openconfig-netmod-opstate-0 1

Opt. Eng. (1)

J. Vojtechet al., “Joint accurate time and stable frequency distribution infrastructure sharing fiber footprint with research network,” Opt. Eng., vol. 56, no. 2, 2017, Art. no. .

Proc. SPIE (1)

J. Vojtech, V. Smotlacha, and P. Skoda, “Simultaneous transmission of accurate time and stable frequency through bidirectional channel over telecommunication infrastructure with excessive spans,” Proc. SPIE, vol. 9598, 2015, Art. no. .

Other (27)

J. Radil, J. Vojtěch, M. Karásek, and S. Šíma, “Dark fibre networks and how to light them,” in Proc. 4th Quilt Opt. Netw. Workshop, Fort Lauderdale, FL, USA2006, p. 6.

J. Vojtěch, “CzechLight & CzechLight amplifiers,” in Proc. 17th TF-NGN Zurich, Zurich, Switzerland, 2005, pp. 5–16.

Netopeer2—The NETCONF Toolset. Git repository. 2017. [Online]. Available: https://github.com/CESNET/Netopeer2

Sysrepo—YANG-based configuration and operational state data store for Unix/Linux applications. Project homepage. 2017. [Online]. Available: http://www.sysrepo.org/

YANG data modeling language library. Git repository. 2017. [Online]. Available: https://github.com/CESNET/libyang

J. Vojtech, V. Smotlacha, P. Škoda, A. Kuna, M. Hůla, and S. Sima, “Photonic services, their enablers and applications,” in Proc. SPIE, vol. 8516, 2012, Art. no. .

V. Kamalovet al., “Lessons learned from open line system deployments,” in Proc. Opt. Fiber Commun. Conf. Exhib., 2017, Paper M2E.2. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-M2E.2

M. M. Filer, H. Chaouch, X. Wu, J. Gaudette, and J. L. Cox, “Interoperation of layer-2/3 modular switches with 8QAM/16QAM integrated coherent optics over 2000 km open line system,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper W4H.1. [Online]. Available: http://www.osapublishing.org/abstract.cfm?URI=OFC-2017-W4H.1

Czechlight, Project homepage. 2017. [Online]. Available: https://czechlight.cesnet.cz/en/

J. Vojtěch, L. Altmannová, M. Hůla, J. Radil, S. Šíma, and P. Škoda, “R&E network in the czech republic,” WDM Systems Summit, 2011. [Online]. Available: https://photonics.cesnet.cz/_media/publications/fiber-optics/2011/10_ cesnet_vojtech-singlefibrebidirectionaltransmission.ppt

J. Vojtěch, M. Hůla, J. Radil, V. Smotlacha, P. Škoda, and S. Šíma, “Further fibre capacity increase for accommodation of new services,” in Proc. TERENA Netw. Conf., 2013. [Online]. Available: https://tnc2013.terena.org/core/presentation/53

M. Terpstra, “SDN and Gartner's Hype Cycle,” 2015. [Online]. Available: http://www.plexxi.com/2015/01/sdn-gartners-hype-cycle/

A. Sadasivarao, D. Naik, C. Liou, S. Syed, and A. Sharma, “Demystifying SDN for optical transport networks: Real-world deployments and insights,” in Proc. 2016 IEEE Global Commun. Conf., 2016, pp. 1–7.

M. K. Shin, K. H. Nam, and H. J. Kim, “Software-defined networking (SDN): A reference architecture and open APIs,” in Proc. 2012 Int. Conf. ICT Convergence, 2012, pp. 360–361.

J. D. Reiset al., “Flexible optical transmission systems for future networking,” in Proc. 2014 16th Int. Telecommun. Netw. Strategy Planning Symp., 2014, pp. 1–6.

I. T. Union, “ITU-T Recommendation G.872 (01/17) Architecture of optical transport networks,” 2017. [Online]. Available: https://www.itu.int/rec/T-REC-G.872-201701-I/en

OpenConfig—Vendor-neutral, model-driven network management designed by users. Project homepage. 2017. [Online]. Available: http://openconfig.net/

Open ROADM Multi-Source Agreement. Project homepage. 2017. [Online]. Available: http://openroadm.org/

Y. Leeet al., “A Yang Data Model for WSON Optical Networks,” Internet Engineering Task Force, Internet-Draft draft-ietf-ccamp-wson-yang-09, 2017, work in progress. [Online]. Available: https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-wson-yang-09

YANG models for CzechLight optical devices. Git repository. 2017. [Online]. Available: https://github.com/jktjkt/czechlight-yang-models

J. Vojtěch, M. Hůla, L. Altmannová, S. Šíma, and J. Radil, “Open photonic devices and systems,” in Proc. Winter ESCC/Internet2 Joint Techs Meeting, 2010. [Online]. Available: https://meetings.internet2.edu/2010-01-JT/detail/10000964/

I. T. Union, “ITU-T Recommendation G.694.1 (02/12) Spectral grids for WDM applications: DWDM frequency grid,” 2012. [Online]. Available: https://www.itu.int/rec/T-REC-G.694.1-201202-I/en

World Wide Web Consortium and others, “XML Path Language (XPath), 1.0,” W3C Recommendation, 1999. [Online]. Available: https://www.w3.org/TR/1999/REC-xpath-19991116/

J. Kundrátet al., “Software-defined optics in last mile for research and education in the Czech Republic,” J. Commun. Softw. Syst., vol. 11, 2015. [Online]. Available: http://jcomss.fesb.unist.hr/index.php/jcomss/article/view/97/75

BeagleBone Black. Project homepage. 2017. [Online]. Available: https://beagleboard.org/black

Poor performance of validation. Sysrepo Issue tracker at GitHub. 2017. [Online]. Available: https://github.com/sysrepo/sysrepo/issues/892

Poor performance of notifications. Sysrepo Issue tracker at GitHub. 2017. [Online]. Available: https://github.com/sysrepo/sysrepo/issues/735

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