Otn switching

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Otn switching

There was a problem with your video. Another version is available. Brochure Packet-Optical Platform. Telecommunications industry and service provider networks must quickly evolve to deal with an explosion of digital traffic driven by multimedia services, mobile applications, social media, VoIP, and cloud computing.

Network traffic used to be all about voice calls carried over circuit-based networks in a predictable network connection between pairs of endpoints. Today, most network traffic is packet-based, generated by a multitude of services and applications in bursty, unpredictable traffic patterns, with widely varying and more stringent demands on bandwidth and data transmission performance.

Because OTN is a fully transparent protocol, adapting existing services is pretty straightforward. OTN-based backbones and metro cores offer significant advantages over traditional WDM transponder-based networks, including increased efficiency, reliability, and wavelength—based private services.

The IP-over-OTN infrastructure also offers better management and monitoring, reduced hops, increased protection of services, and reduced costs for equipment acquisition.

In addition to scaling the network to G and beyond, OTN plays a key role in making the network an open and programmable platform, enabling transport to become as important as computing and storage in intelligent data center networking. OTN is a digital wrapper that provides an efficient and globallyaccepted way to multiplex different services onto optical light paths.

With off-board software tools, service providers and enterprises alike can automate services from creation through orchestration and delivery. Comments are limited to characters.

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Hi Carlos, thank you for reaching out and your interest. The Adaptive Network enables network providers to optimize their existing infrastructures while incorporating new technologies and ways of working. How much are you using SDN in your solutions? Thanks for your answers.

Hi Jack, we just a webinar on the topic of OTN and the advantages of converged packet-optical that might be of interest. Here's a link to the on-demand version of the webinar. Hello Ciena, I really interested about all from your services,courses,etc. I would like to receive courses or documents about OTN due I consider an interesting technology to learn.

IP and Ethernet aggregation is a converged networking approach that enables the aggregation of traffic from common Ethernet Layer 2 and IP Layer 3 services on the same, cost-efficient network architecture. It defines a footprint-optimized solution for transporting Gb Ethernet over DCI links targeting a minimum of 80 km.

Enabled by advanced coherent optical technology design targeting small, pluggable form factor modules such as QSFP-DD and OSFP, ZR proposes a technology-driven solution for high capacity data transport, matched to GE switch port market introduction. In the next five years, driven by a need to get data and applications closer to the user, hundreds of thousands of scaled-down data centers will sprout up at the edge of the network to form the edge cloud.

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I agree to subscribe to Ciena's communications.With the explosion of digital traffic and the ever-growing array of bandwidth-hungry applications, OTN Optical Transport Network evolves from point-to-point DWDM remedies to scalable and robust optical networking applications that cater to a wide variety of client signals with equally-varied service requirements.

It is imperative to clearly define what is meant by the term OTN.

What is OTN?

OTN integrates functions of transporting, multiplexing, routing, management, supervision, and builds OTN client e. OTN network combines the advantages of optical transmission and electrical processing to provide end-to-end, transparent pipe connections, increased spectral efficiency, and large-capacity transmission capabilities for long-haul transmissions.

The primary benefits of OTN network are presented as follows. Standard Hierarchy—OTN standards include a standard multiplexing hierarchy, defining exactly how the lower-rate signals ascend into the higher-rate payloads. This allows the WDM platform to shift lower-rate services within 10Gbps, 40Gbps, or Gbps wavelengths, without the need for external wavelength demultiplexing and manual interconnects. Transport Capacity Expansion—Providing the underlying high-capacity infrastructure for core interoffice, metropolitan interoffice, and broadband business-access networks.

Carriers deploy OTN to support greatest number of services on least amount of infrastructure.

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Reduced Cost—Transporting multiple clients on a single wavelength, while preserving their specific requirements, reduces the overall cost of transport and ensures efficient bandwidth utilization. Transport Flexibility—Network operators can employ the technologies needed to support current transport demands, while also enabling future adoption of new technologies as business needs dictate.

It can easily scale to ring networks, end to end networks and mesh networks. Timing Transparency—Timing transparency is important for offering wholesale services for third-party providers. FS OTN solutions are associated with a comprehensive list of products to match the future-proofing fiber and network requirements of every individual network task. COM focuses on designing various optical transmission solutions to make your network farther, faster, smarter.

COM, kindly submit the following three requirements about your project, then our experienced tech engineers will design the optimal OTN solution tailored to your specific needs.

The specific distance your network transports will determine the fundamental equipment that is needed. Specifically, the transmission distance between each span will indicate whether the DCM Dispersion Compensation Module would be needed to compensate in the fiber optical link. Our OTN solutions can be tailored to both dual and single fiber type. And link loss is necessary for collocating the most appropriate optical transceivers and some active components such as EDFA amplifiers.

And a good acquisition of the numbers of businesses you were to deploy can pave the way for future network expansion.

Tutorial: Understanding OTN and the Path to the Future

To customize any OTN network solution, please contact us at sales fs. Passive DWDM vs. Active DWDM.OTN has proven to be extremely flexible for accommodating new client signals and line rates.

Cisco NCS 4000 400 Gbps DWDM/OTN/Packet Universal Line Card Data Sheet

However, the transition to next generation OTN transport has needed to account for greater network densification and flexibility. While there will be an enduring market need for OTN2. DIGI-G5 enables packet optical transport platforms to triple in capacity while slashing power consumption by 50 percent per port. DIGI-G5 delivers an unprecedented 1. METAG provides ultra-low-latency OTN encryption for secure cloud connectivity, and it consumes 50 percent less power per port than the previous generation, enabling router line card capacities of 1 Tbps and higher.

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Storage ICs Documents and Software. Timing ICs Documents.

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Overview Resources Awards Applications. Resources Poster OTN 3. OTN Transport Equipment. Poster: OTN 3.Two switching layers are formed TDM and WSON and functions of transport, multiplexing, routing, management, supervision, and survivability are defined.

The promise of the Optical Transport Network OTN is designed to address these issues by delivering a transparent framework to efficiently carry diverse traffic types. Defined by recommendation G. At a basic level, G. There are six distinct layers to this format. The G. Blog Support Search. Menu Close. How does G. This contains the encapsulated client data, and a header describing the type of that data. This level adds optical path-level monitoring, alarm indication signals and automatic protection switching.

OCh: Optical Channel. This represents an end-to-end optical path. This deals with fixed wavelength DWDM between relays. The control plane automatically calculates an optimal path for each client connection when the connection is established. It can also automatically calculate a path for a diversely routed protecting connection, on which resources can either be held in reserve or pre-empted when required.

When resources are added to or removed from the network, the control plane can automatically recalculate optimal routes for all existing connections to make best use of the newly available resources. Learn more: view the specification of our OTN solution.

otn switching

Contact us to buy our OTN protocol stack.There was a problem with your video. Another version is available.

otn switching

However, it turns out that there are some key advantages for metro enterprises that deploy a centralized switched fabric, even within a few closely spaced sites, without the typical mesh connectivity between these locations. Muxponder-based solutions are best suited for predictable point-to-point connectivity, or when the DWDM line system is being used for simple interconnection of switch or router devices.

They are also useful at the network edge for multi-service and low-rate aggregation onto an OTN infrastructure. It turns out that central fabric-based switching solutions are well-suited for metro enterprise networks requiring flexible, on-demand, any-to-any core site connectivity.

A typical metro enterprise use case would be to initially deploy a couple of G waves over a centralized switched infrastructure between each of the main locations.

There is no need for meshed fiber connectivity between sites as shown in figure 1. Instead, sites are interconnected in a ring-like fashion as shown in figure 2each site being equipped with a centralized switching platform. As every site is interconnected, the G of bandwidth 2 wavelengths of G is shared between all the locations and is allocated on-demand as needed. Additionally, increased service granularity is enabled with the ability to adjust each ODUFlex container in 1.

Not only does this offering deliver full separation of various applications within G wavelengths but it guarantees that each application has its own dedicated network resources, including segregated packet queues. If we take a closer look at our metro enterprise example, one of the G wavelengths can be sliced as shown in Figure 4 — where all the core sites are interconnected via Ethernet VPNs enabling site-to-site content sharing as well as simultaneous access to both the primary and backup data centers.

otn switching

To ensure continuous availability of business-critical traffic, multi-layer protection options and equipment resiliency can be combined.

This complete solution enables deterministic packet service transport with Metro Ethernet Forum MEF services and topologies, traffic management including QoS, end-end Ethernet service layer OAM and support for multi-point to multi-point services, as well as aggregated handoffs to standard router interfaces. Infographics and posters Optical Transport Network.

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Today, operators can leverage a full range of photonic architectures to add high-capacity wavelengths to their photonic network. Additionally, because services are groomed at layers 1 and 2, the number of wavelengths required at the optical layer are reduced, preserving the DWDM channel count to accommodate future growth. This significantly improves network efficiency without over-building capacity day 1. This means that the infrastructure investments you make today will not become obsolete tomorrow.

As new modulation schemes and line rates become available, you will be able to reuse client cards and ports as new line cards are deployed. This degree of flexibility is not available with transponder-based architectures — when a transponder is deployed, fiber patches must be made for the new line interfaces, as well as for all the client traffic. Similarly, as new client interfaces and rates are introduced, the existing line interfaces and ports can remain in place, and the centralized switch can groom the new client services into existing line ports.

Subscribe to get more articles on this topic. Comments are limited to characters. Nice explanatory video! Now it's clear: these two are not opposities, bot complimentary and synergetic.

You are correct about what a transponder or OTR does. It basically maps a client wavelength to a DWDM channel or wavelength. Muxponders are used to mux or aggregate lower speed clients to a DWDM channel or wavelength. As mentioned in the blog, muxponders still have a role to play in the network, particularly at the edge.Product overview.

The card has been engineered to be a Universal line card: all services and applications supported by NCS can be efficiently deployed using just this card, without stranding any bandwidth. The Cisco NCS Universal line card dramatically enhances system density and performances delivering Gbps capacity per slot 6.

The Next-Generation Transport Network: Solution Options

Selecting the type of pluggable optics, on a port-by-port basis, defines the unique profile of each Universal line card:. A growing number of network events are generated every day as billions of programmable devices connect to one another over the Internet. This imposes new expectations on network performance. As the Internet of Everything IoE builds, the role of the network to support, manage, and control these programmable device-driven events becomes critical as these tasks rapidly surpass the capacity of manual intervention.

Networks must evolve to support new levels of virtualization, programmability, and performance. Networks must now scale not just bandwidth, but also compute and control functions to manage policies and generate the proper responses within the expected timeframe.

Combined, the Cisco NCS and the Gbps Universal line card provide network operators with an enhanced architectural approach to profitably deliver innovative and flexible services across an evolved programmable network, while simultaneously increasing resiliency and dramatically reducing capital expenditures. Support of 8-QAM modulation format will also further enhance the capability of the NCS system, enabling the right tradeoff between fiber capacity and un-regenerated transmission distance.

The ability to configure multiple grey and DWDM ports from a single line card dramatically reduces operational costs. With only one line card to maintain, forecasting and ordering are greatly simplified, sparing is significantly reduced, and designing network expansion is far less complex, resulting in accelerated time-to-market for new services. The different modulation schemes listed above are software configurable to deliver the ideal tradeoff between reach and transport capacity per wavelength.

The constellation diagrams for these modulation types are illustrated in Figure 2. While higher order modulation formats provide higher spectral efficiency, they generally require more Optical Signal-to-Noise Ratio OSNR resulting in reduced un-regenerated reach. Figure 3 shows the relationship of reach vs. Cisco Coherent Transmission technology greatly enhances the reach and reliability of transport performance while providing the flexibility to select the optimal modulation scheme for a specific application.

The primary benefits of Cisco Coherent technology includes:. Both 50 GHz channels spacing supporting 96 Nyquist shaped wavelengths and grid-less MHz tuning steps are supported.Alison Izard.

There are a number of options for modernizing your transport network, including native TDM switching over the optical transport network OTNa complete overlay network with routers and DWDM, and finally migrating to packet optical using circuit emulation CEM.

Each option has value, but the value depends on your end goal. Drawbacks to this approach: If you want the solution to support Ethernet, there can be problems. Capacity utilization on each system is limited to a maximum of approximately 40 percent. This Ethernet-only network requires that you change out your optical carrier technology for example, OC3 or OC12 to Ethernet.

It is a comprehensive changeover instead of a gradual migration to a hybrid network. Drawbacks to this approach: It would force your customers to buy new CPE devices and change their service contracts.

The greatest risk is for customer churn; will your customers agree to incur the expense of new equipment? Are they willing adjust their operations environments to support the new interface? Or will they put their contract out to bid and possible find another provider?

Management will be different. It will require expertise both within your organization and among your customers. It could be expensive and take time to implement.

It is predictable and deterministic, with subms resiliency. DCSs can be eliminated right away, dramatically reducing costs. SDH, Gigabit Ethernet routers may also be taken away or reduced.

No need to cannibalize other systems to keep other legacy gear running or buy expensive replacement parts, if they are even available. Your next-generation transport network becomes predictable and deterministic, with subms resiliency.

The solution is supported by industry standards. In our recently published E-Book, A Roadmap for Transport Network Modernizationwe cover the next-generation transport network solution options in more detail. In addition, we look at both the business and technology requirements of transport networks today and into the next decade.

If you are ready to modernize your network, find out how with A Roadmap for Transport Network Modernization.


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