Bringing you the very latest on SDN and NFV developments across the world

Posts tagged ‘telecom’

Interview with Shahar Steiff, AVP Business Operations, PCCW Global

Shahar SteiffIn advance of Network Virtualization & SDN World in London on 27-30 May 2014, we caught up with Shahar Steiff, AVP of Business Operations, PCCW Global, to find out his thoughts on the industry in 2014…

Shahar, welcome. What would you say has had the largest impact in terms of progressing SDN and NFV in telecom networks to date?

SS: “If we have to take one event this year that made the largest impact on the future of SDN and NFV, I would say it is AT&T’s publishing its “Domain 2.0 Vision”. When one of the world’s largest carriers announces its support of SDN and NFV technologies, it provides the whole industry assurance that their efforts are spent in the right direction. And using AT&T’s own words: “Domain 2.0 is not a completed architecture or technology plan; rather it sets direction. There remains much to do…”

2) Do you feel that the industry is making as much progress towards implementing SDN and NFV this year as you would like?

SS: “The industry is still in “hype” mode when it comes to SDN and NFV. Several limited test cases have been proven to work, but the business case is still unclear. In addition to that, the majority of the work and progress is limited to the “comfort zone” of the data-centre, where SDN and NFV were conceived, while developments related to carrier networks and mobile networks are still at infancy.”

How is your company contributing to the realisation of SDN and NFV at present?

SS: “PCCW Global is a contributing member at several of the Industry Standard-Defining-Organizations, such as MEF, ONF, 3GPP.

“At PCCW Global we believe that the industry as a whole will benefit from convergence towards standardized APIs that will allow vendor agnostic abstraction and virtualization.”

What do you think are the biggest hurdles towards implementing SDN and NFV at present, and how can they be overcome?

SS: “Implementation of SDN and NFV is effected by three factors:

a. The technology is still maturing and has limited commercially available solutions.

b. The technology is optimized for data-centre environments and needs to be further enhanced to suit the specific needs of carrier’s transport networks.

c. Integration of SDN and legacy equipment is still under development. A migration plan that retains the value of previous investments needs to be developed.

“In addition to that, today’s “selling point” for SDN and NFV is “Cost-Savings”, while the business case for that approach still needs to be proven. Instead, I trust that once carriers start realizing the operational benefits of this technology and the NEW REVENUE opportunities it may bring, they will be more keen to give it a try.”

Which areas of the network do you think should be prioritised for virtualization, and why?

SS: “To date – SDN and NFV have been realized in the Data-Centre. That’s one part of the network. There are other parts of the network that need to undergo the same: Wireline/Wireless/Mobile access networks, the packet core network, aggregation layers.

“The key is agnostic abstraction, which should be implemented on any of the above mentioned network areas. Agnostic abstraction which defines the service regardless of the vendor, the carrier and the underlying technology. Once that is achieved, virtualization becomes simple to implement. This emphasizes the key role of SDOs (Standard-Defining-Organizations) in the future of SDN and NFV. It is only through collaboration of vendors, service providers and OSS/BSS platform developers that the industry will be able to define consensus-based abstracted services and APIs that the vendors and OSS/BSS developers will then be able to implement in their hardware and software, allowing the carriers to virtualize their services in a ubiquitous manner across the different areas.”

What are your expectations for the development of SDN and virtualization in telco networks in coming years?

“To date – SDN and NFV development has focussed primarily on the Southbound-Interface. That’s a good starting point. There’s much debate going around the Northbound interface at this time. However – taking into account that in today’s environment services will almost always transit beyond the boundaries of one operator/system/carrier/platform into one (or more) other platform(s), it is key that an Eastbound-API is developed. Such Eastbound-API will allow a service to span across multiple domains delivering end-to-end management.

“As an example: A mobile user establishing HD Video conference with two other users: another mobile user that is subscribed to another mobile operator, and a colleague in the main office sitting at their desk. In the future SDN/NFV managed network, a VPN with CoS characteristics and bandwidth that is capable to convey an HD video signal will be established, in real time, from each user’s device, through their access network (mobile or wireline), through the core backbone of their network provider, to the MCU (Media Concentration Unit) in “the cloud” (a data-centre somewhere).

“For this example scenario to properly function – all elements of the network must use the same service abstractions and same APIs, regardless of their make, model or software release. A “guaranteed 768Kbps from device A to device B” is the same no matter if one device is a mobile phone on an LTE network and the other device is a macbookpro connected to the office WiFi. If all platforms along the path support the same standards, SDN and NFV will allow real-time delivery of billable CoS-managed-network services.”

Shahar will be speaking in more detail about his thoughts and ideas at Network Virtualization & SDN World in London on 27-30 May 2014. For further information and to register for the event, please visit


Speaker Interview: Ravinder Shergill, Senior Technology Architect, Telus, Canada

Ravinder ShergillWith Carrier Network Virtualization just around the corner, we caught up with another of the show’s speakers, Ravinder Shergill, Senior Technology Architect from Telus, Canada. Here are a few of his thoughts on the nature and growth of the NFV and SDN industries in 2013/4: 

RS: “We’re living during exciting times, with the opportunity to effect technological innovations for years, and perhaps decades to come.

“With incredible data growth and significance of cloudification, business as usual will not suffice. New and innovative models must be explored, and SDN and NFV hold the promise of such potential. First solution sets are targeted at the Data Center environment, and the greatest opportunity lies there. However, the opportunities landscape is much broader.

“The SDN and NFV eco-system is currently in transition, but as the roadmaps and the standards solidify, it will pave the way for easier acceptance

“Small adoptions, perhaps as pilots, are imminent, but broad deployments are further away, perhaps even 5 years out. As the SDN and NFV eco-system develops, this will pave the way for gaining traction in the industry. While there has been good progress in 2013, there is a long journey ahead.

“At Telus, we are now at the Proof-of-Concept stage, and the outcomes of these will determine our future plans.”

You can hear more about Telus’ ideas and plans regarding SDN and NFV at Carrier Network Virtualization in Palo Alto on 9-11 December 2013. For further information, please visit 

Interview with Shazia Hasnie, Senior Director, Network Architecture and Strategy, Megapath, USA

Shazia Hasnie-2012Informa’s Carrier Network Virtualization conference and exhibition in Palo Alto, USA on 9-11 December 2013 is now only two weeks away. In advance of the show,  we caught up with Shazia Hasnie, Senior Director, Network Architecture and Strategy, Megapath, USA, to find out her thoughts on the growth of SDN and NFV and her expectations for the industry’s future…

Shazia, welcome. Why do you think the idea of SDN and NFV is suddenly taking off?

SH: “Cloud computing has put tremendous pressure on network connectivity to be dynamically scalable and virtualized. In cloud data center environment, the concept of resource pooling with the ability to dynamically control physical and virtual resources is key. Compute and storage to a large extent have been evolved to be virtualized and pooled resources. However, the network remains static and hence presents a bottleneck. In cloud data center environment, networks need to be agile and virtualized and NFV/SDN provides a way to achieve that.

“SDN has promise in the carrier network environment as well. According to the resent Cisco Visual Networking Index survey, the annual global IP traffic will surpass the zettabyte threshold by the end of 2017. This is a lot of traffic to handle which translates to an ever increasing requirement to augment network capacity. To complicate the matters further, carriers have no automated mechanisms to orchestrate the stranded capacity on its circuits to other customers, who may need it. Hence, this expensive resource remains unutilized.

“Thus, CapEx and OpEx to operate telecom networks are enormous while revenue remains largely decoupled from the cost of architecting, scaling and operating today’s networks. Furthermore, the revenue generating services take several weeks to be created, provisioned and activated on these networks.

“The reason the idea of SDN and NFV is taking off is because it is a much needed concept for both telecom carriers and cloud operators. SDN and NFV present the concept of architecting these networks on low cost COTs hardware while the control of network functions remains in a logically centralized and directly programmable software domain.

2) Whereabouts in Telco networks do you see that SDN and NFV will be of the greatest benefit? Where will we see the first deployments?

SH: “Complete abstraction of control layer from the underlying hardware would take a few years at its best to take place. In the meanwhile, a subset of benefits of SDN would be realized in a software defined service layer. Thus, OSS/ BSS systems in a telco network would most likely be the first to get logically centralized and programmable via a service automation and orchestration layer. This software defined service orchestration layer may interface with the existing OSS/BSS systems and provide an integrated and logically centralized view and control of the network. The other area where SDN and NFV concept would take off in telco networks would be the network edge.

“Most likely, tier 1 operators, globally, will be the early adopters of the SDN technology.”

3) Are there still any major hurdles you see which SDN and NFV have to conquer before adoption can become widespread? If so, what are they and how should they be resolved?

SH: “SDN and NFV technologies are very nascent. There are many pieces of the puzzle which are not in place yet.

“SDN / NFV environment would be composed of physical and virtual resources. Network virtualization poses a great challenge to network state management. Live workload migration and dynamic resource allocation are core concepts of the virtualization technology. However, during the migration, network connectivity, configuration, ACLs, and QoS/CoS should remain consistent and intact. In order to manage server virtualization along with network virtualization, sophisticated management and troubleshooting solutions would be required.

“The existing (non-SDN) networks are here to stay for a long time to come. As an intermediate step, we require multi-vendor service automation and orchestration platforms to provide SDN like capabilities to the existing networks without actual abstraction of control plane from the forwarding plane.

“Also, OpenFlow needs to mature in terms of its switch configuration protocol (OF-Config), extension to optical transport and definition of an open, standardized northbound API.

“Boundary or interface functions are needed to be defined to interface SDN controllers not only to other SDN controllers and domains but also to legacy IP networks.

“SDN would require application-aware routing. The routing / control software that SDN applications would require for advanced functionalities is not ready yet. The IETF I2RS working group was formed in November 2012 to address this problem for the existing distributed routing architecture. The I2RS would allow applications to dynamically modify routing decisions on the basis of application requirements keeping in view the network events, topology and traffic conditions.

“The carrier grade performance in a virtualized networking environment raises some questions and concerns. When complex network functions are running at the software layer, the CPU performance becomes critical. Performance of the current general purpose multicore processors may not fit the bill. New and innovative solutions would be needed to accelerate the performance of these processors.”

4) What kind of timescale are we looking at until SDN and NFV become more commonplace in carrier networks across the world?

“SDN and NFV present a paradigm shift in how networks are constructed and operated today. However, many tier 1 operators are trialing SDN in targeted domains for specific applications. It is given that the existing infrastructure would remain in place for a long time to come while operators strategize to adopt SDN and NFV concepts fully.

“If current state of affairs in the industry is any indication, it can be reasoned that the wider adoption of the technology by telecom carriers would lag behind the wider adoption by data centers at least by a couple of years. However, telecom carriers in general are very aware that their future network architecture would be substantially different from their current architecture.

“It took approximately six years for server virtualization market to grow from 0 to approx. $1B. SDN / NFV adoption would be considerably accelerated then that. A recent report published by Transparency Market Research claims that the global SDN market is expected to reach $3.5B by 2018.”

5) What are your own company’s plans for deploying SDN and NFV?

SH: “Being first to market may not always prove to be prudent. We have to time it right and understand when the adoption of this new technology would add most value to our business and add competitive advantage and differentiation. We are currently in an exploratory phase and doing technical due diligence and impact analysis while formulating our business case. We are interviewing vendors. In our vendor selection, we would prefer a vendor who is committed to open standards, who is very involved in the standardization process and investing in R&D.”

6) What do you expect will be the defining trends within the industry in 2014?

SH: “I believe that enterprises, cloud service providers and data center operators will predominantly drive the SDN market in 2014.

“Cloud computing paradigm is not complete without network being virtualized along with server and storage virtualization. Thus, cloud computing would continue to drive virtualized overlay network technology in the data center environment for its own survival. These overlay network virtualization technologies would continue to be developed and adopted by data center and cloud computing sector.

“However, in the telecom operators’ world, the two key areas would be the virtualization of the network edge and software defined service orchestration also known as OSS/BSS virtualization. The top tier telecom operators, globally, would continue to trial and start to deploy SDN technology for specific use cases, mainly focused around the two key areas mentioned above.

“The mobile network operators would focus on their core and metro networks first, before moving on to RAN for virtualization. An industry survey published by Informa telecoms and media earlier this year showed that approx. 93% of the respondents from mobile operators’ space expect SDN to be implemented in their network in the next 1 to 5 years.

“SDN is colossally disruptive and if the past is any indication of the future, it would enable new vendors and competitors to enter into the arena. Additionally, many channel partner programs will most likely emerge in 2014.

Shazia Hasnie is Senior Director for Network Architecture and Strategy at MegaPath, based in San Jose, California. Being a subject matter expert, she has spoken on the topics of SDN and NFV at various industry events. Shazia has more than 14 years of post-doctoral experience and broad-based expertise in engineering research and innovation, technology and business strategy and management. She holds a Ph.D. in Telecommunications Engineering from the Australian National University.

She will be speaking on SDN and NFV at Carrier Network Virtualization in Palo Alto on 9-11 December 2013.

For further information, please visit