What will be tomorrows network infrastructure?
Due to historical reasons, many different network infrastructures co-exist in today's networks, such as Ethernet, SONET, ATM, etc. However, if we are building a complete new infrastructure for a metro or large campus network, which technology would be the most appropriate? What is Cisco Experts opinion?
I would answer this question differently if I were considering the use of the network to be a service providers network or an enterprise network in that I could achieve a different cost model based on single versus multiple customers on the same networks. Also, the end needs of each customer are different, and if they were completely defined could lead to a different cost model for the services rendered.
Generally, a service providers network requires support for TDM and data protocols, requires stringent Service Level Agreements, and generally either owns their own or has a lower cost per mile for fiber than an enterprise. For this reason, a SONET/SDH based network with data capabilities provides the most cost effective way to transport the variety of circuits and streams from the end users location to the point-of-presence (POP) and a WDM system based network is used for the long haul and inter-POP traffic is used. Data can be Ethernet over SONET/SDH or WDM, or it can be done with RPR (802.17).
The enterprise is usually seen as more fiber constrained, and therefore uses a metro WDM (Coarse or Dense) to transport SAN and Ethernet connections between buildings. The ability for the enterprise to convert most legacy traffic into Ethernet, and the ability to combine Ethernet ports into ever-larger trunk speeds, can also lead to very cost effective Ethernet over dark fiber networks up to the new 10 Gigabit per second standard. RPR systems can also be used to extend SONET/SDH recovery mechanisms to Layer 2 and 3 networks.
With voice and video moving to native IP, and the ability to tunnel most other legacy traffic over IP, Metro Ethernet systems over dark fiber, or extended over WDM or SONET/SDH systems are beginning to be the most cost effective way for businesses to connect within the campus or metro today.
The question we have to ask whenever we build a network is what will the next 10 years bring us. My vision is one of lots of devices with wireless mobility, the mixing of SIP and HTTP services to the mobile devices, and lots of high speed Global Area Networking overhead to figure out who and where you are. What is your vision of the traffic and protocols you will be required to support in ten years?
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All,
I'm pleased to announce our new Network Infrastructure Design and Architecture Community. In this community we encourage everyone to share their knowledge and start conversations on design and overall network topology. All topics are welcome, including requirements and constraints of the network, tools and techniques, issues of hierarchy, leading practices, services, build strategies, architectures and solutions to solve business problems.
Who will be the first to make it on that leaderboard?
Cheers,
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Thanks for the kind words about the community. It's always nice to hear the things we do make a difference.
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Hi,
I'm sure many of you regularly do tests of new or modified network infrastructures before going live. And you developed detailed plans and schedules how to test, how I did too.
Does anybody know if there exist standardized testing methods for this cases?
Like recommendations how to check features, performance, hardware failures, convergence times, software updates, network management etc.?
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Best Regards
ThorstenThorsten
I guess you are looking for something like this -
http://www.ciscopress.com/store/enterprise-network-testing-testing-throughout-the-network-9781587141270
should say I don't own the book or have ever read it.
I have never come across a set of standardised testing methods in the same way software has but that's is not particularly surprising when you consider networking as an industry is a long way behind other parts of IT in that respect.
We are all still using CLI for most of our jobs :-)
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Hi,
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Thanksthrough ur discription i havnt heard from u any thing about the ditribution layer!!
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basicaly
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