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  1. Hello Rene!
    First of all nice post on SDN.My question is will it be difficult for network engineers in future? How this can affect any network engineers Job? since we don’t know any programming languages how we will sustain in market.so we will have to upgrade ourselves in this regard.so now the main question arise how to start and from where to start learning these stuffs??
    You will be starting your own tutorials on SDN technology in future?? Thank You!

  2. Hi Rene,

    Waiting for your answer Sir

    Thank You


  3. @Deepak SDN is getting more popular in datacenters because of some of the reasons I described in this lesson. The same thing probably applies to (large) Enterprise networks.

    You don’t have to become a super programmer, after all a programmer is also not a network engineer. It is a good idea however to get familiar with scripting and some simple programming languages like Python. Learning how APIs work and how to interact with them is also a good idea. Python is something that I will add here…you can learn the basics of it in a few hours. I will also add more SDN material.

    @Hans The actual forwarding of traffic is done in hardware by ASICs which is much faster compared to a “software” lookup where we use the CPU. The forwarding is a task performed by the “data plane”. Feeding the data plane with information with information from the routing table, ARP table, access-list entries, etc. is done by the “control plane”. Most SDN solutions take the control plane out of the hardware and put it in the SDN controller. We still forward our traffic with ASICs.

  4. In some other lessons, I will give you some configuration examples of SDN solutions like Open SDN, Openflow, OpenDayLight, Cisco ACI and Cisco APIC-EM.
    Hi Rene Is Openflow an SDN solution as quoted as well as the most popular SBI? Many thanks
  5. Hello Konstantinos,

    Good question, I wrote something about Cisco SD-access and SD-WAN. Take a look at this lesson:

    Both are interesting. I like the idea about having an overlay and underlay network in the SD-access solution. Cisco SD-WAN (viptela) also looks pretty interesting.


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