Powerful tools to compete against big box stores. – Withdraw what you need, when you need it – Access a line of credit of up to $150,000 (2) Get a $100 e-gift card.Īpply for up to $150,000 of funding through Kabbage, and you’ll get a $100 e-gift card when you qualify (1) with Kabbage: Show notes… Favorite Success Quote or Mantra. Almost 25 years later, this little specialty coffee roaster has expanded to 4 locations and is a staple in the Charlottesville community. In the early 2000's Fafara took over a small coffee roaster called Shenandoah Joe. Keep it simple and Stupid is very important and you should remember this principle, Einstein, Stupid Core Networks and Orhan Ergun whenever you design any communication network.In this episode with David Fafara, we discuss keeping it simple stupid, giving back to the community, being a hustler, starting small and scaling up, giving before you get, continuous learning, doing one thing really well, educating your staff and guests, scaling a business, and being someone's exit strategy.Ĭhicago native, David Fafara is a graduate of North Park and West Virginia where he focused on physical education and counseling. But instead, if people think multiple steps ahead and design the things in the simple way possible, so no more modifications can be possible by anyone else in the future. Later on, after couple years another people research the same topic and repeat the same. What I see in the networking field, what most people do, is to read, watch materials on the topic, just modify it a little but and publish it as their own. As an example, in MPLS network, Core devices only swap the label, but edge devices runs MP-BGP, VRFs, layer 2protocols or Routing with the customers, QoS and security functions and so on. Stupid part of KISS principle actually mean, keeping the intelligent functions away from core/backbone of the networks. Of course, bigger size of networks (MNOs for example) use 4 even 5 layers as of 2017 but it doesn’t change the role of core/backbone layer. What was the job of each layer ?Īccess layer is used for user/device termination, policy enforcement, trust boundary, filtering and so on.Īggregation layer is used speed multiplexing, providing scalability for overall network by preventing excess amount of connection.Ĭore layer is used to pass traffic between each and every point in the network, as fast as possible, if it is possible, without any policy enforcement. Remember in three layer architecture, access, aggregation and core. In fact, I wrote an article on the subject and highlighted that ‘ Edge devices are the brain of the network’ Stupid part comes from the idea of having dump core devices and smart edge devices. Keep it simple part of the KISS principle has the same meaning with Einstein’s quote. KISS Principle recommend the same what Einstein is recommending with his quote and goes beyond. Of course, complexity is necessary in some cases to solve particular problem as I explained in my ‘ Network Complexity’ article, for the above requirements (1 DC, 20 branches, 22 routers), it is best to place all routers in one backbone area. In other word, fourth option is simplest option. Second option is less complex than third one and fourth option is the least complex. No multiple OSPF area, No ABRįirst option is most complex and it is unnecessarily complex. You can place datacenter and all the branch offices in a backbone area. You have totally two OSPF areas and 2 ABRs.Ĥ. You can place datacenter in OSPF Backbone area and all branches in same non-backbone area. You can place datacenter in OSPF Backbone area and each and every branch in separate Area, you deal with multiple areas, 21 different OSPF area in this caseģ. You can deploy in datacenter and each and every branch, different OSPF processes, and you deal with the redistribution because you use different OSPF processes in different places of networkĢ. And totally you have 22 routers, 2 in DC and 1 in each branch office.ġ. In a small OSPF network, imagine you have 1 datacenter and 20 branch offices. How we can adapt Einstein’s simplicity principle to networking ? If ‘A represents a process, and ‘A***’ represents the simplest possible version of ‘A’, then one should work towards finding ‘A***’, and not towards an intermediate version ‘A**’ or ‘A*.įrom this example, as you can understand, most possible simplicity is recommended by Einstein. It is very long debate what really Einstein was trying to say and unfortunately since He is dead, we can’t ask himself but at least let’s try to understand. ” Everything should be made as simple as possible, but no simpler ” Let’s remember What Einstein said about simplicity. What is KISS Principle ? Okay it stands for Keep it Simple and Stupid but what does really it mean in networking ?Ĭan we really make things simpler ?.
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