Software Defined Networking (SDN) Simplified

ccna r/s Jul 26, 2016

The recently announced CCNA R/S version 3 includes a collection of topics falling under the category of Network Programmability. The underlying technology here is Software Defined Network (SDN), which allows network device configurations to be orchestrated through software applications. Basically, instead of accessing a router or switch command line to enter traditional Cisco IOS commands, we can write a program (typically written in the Python programming language) to make changes to one or more devices. So, the purpose of this blog post is for you to learn the theory and architecture behind SDN.

The Promise of SDN

Traditional networks, where we individually configure routers and switches, simply do not scale well nor do they adapt well to dynamic environments. For example, maybe you run an e-commerce business, and you’re about to announce a big sale. To handle the anticipated spike in traffic, you spin up some virtual machines (VMs) and want to route a...

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WAN Topologies

ccna r/s Jul 19, 2016

A Wide Area Network (WAN) is a network with geographically separate locations, and these locations can be interconnected in a variety of topologies. This video shows you the three WAN topologies you need to know for the CCNA R/S version 3 exam.

 

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945, CCSI 20061

 

If you enjoyed this article, you might also want to subscribe to my podcast:

iTunes: http://kwtrain.com/podcast

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IPv4 Static Routing

ccna r/s Jul 05, 2016

The new CCNA R/S version 3 exam requires you to know how to configure static routing, for both IPv4 and IPv6 networks.

This video, which is a sample from my upcoming CCNA R/S v3 Complete Video Course, shows you how to configure four types of IPv4 static routes:

  • Static Network Route
  • Static Host Route
  • Static Default Route
  • Floating Static Route

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945, CCSI 20061

 

If you enjoyed this article, you might also want to subscribe to my podcast:

iTunes: http://kwtrain.com/podcast

RSS: http://kwtrain.com/rss

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2 of the Most Misunderstood QoS Topics

For me, the addition of QoS to the list of topic areas for the new CCNA R&S version 3 exam was a great thing. The reason is, QoS is my absolute favorite Cisco topic. So, I couldn’t wait to start recording the QoS portion of my CCNA R&S v3 Complete Video Course.

In fact, I recently shot this video on two of the most misunderstood QoS topics, Policing and Shaping. I thought this video could help you, whether you’re studying the Routing and Switching track or the Collaboration track. 

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945, CCSI 20061

If you enjoyed this article, you might also want to subscribe to my podcast:

iTunes: http://kwtrain.com/podcast

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The Fundamentals of IP, ICMP, UDP, & TCP

ccna r/s network plus May 03, 2016

In this video we’re covering the fundamental concepts surrounding the IP, ICMP, UDP, and TCP networking protocols. Having a solid understanding of these protocols is critical to just about everything else we do in networking. So, I thought it would make a great review for you.

Enjoy the video!

 

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945, CCSI 20061

 

If you enjoyed this article, you might also want to subscribe to my podcast:

iTunes: http://kwtrain.com/podcast

RSS: http://kwtrain.com/rss

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How to Calculate an EUI-64 Address

ccna r/s network plus Feb 09, 2016

An IPv6 address is 128 bits in length, and like an IPv4 address, it’s divided into prefix bits (representing the network segment) and host bits (uniquely identifying a host on that network segment). A common approach is to use 64 bits to represent the network segment and 64 bits to represent the host on that network segment.


While you could manually configure the host bits for a router interface, a more efficient approach might be to automatically calculate those host bits using a 64-bit Extended Unique Identifier, known as EUI-64. For example, let’s say you have a router interface on the IPv6 network of 2000:1::/64. You could (in interface configuration mode of your Cisco IOS router) enter the command:

ipv6 address 2000:1::/64 eui-64


This command tells the interface to use 2000:1:: as the network portion of the IPv6 address and to automatically calculate the 64-bit host portion of the IPv6 address.

EUI-64 uses an interface’s MAC address as the basis of...

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Cisco Learning Labs – Review

ccna r/s ccnp r/s Jan 12, 2016

How do you get hands-on experience when you’re preparing for your CCNA R/S or CCNP R/S certifications? One option is using the Cisco Learning Labs. You can check out my review here.

Links to Purchase Cisco Learning Labs:

ICND1: http://kwtrain.com/icnd1labs

ICND2: http://kwtrain.com/icnd2labs

ROUTE: http://kwtrain.com/routelabs

SWITCH: http://kwtrain.com/switchlabs

TSHOOT: http://kwtrain.com/tshootlabs

Kevin Wallace, CCIEx2 (Collab. & R/S) #7945

If you enjoyed this video, you might also want to subscribe to my podcast:

iTunes: http://kwtrain.com/podcast

RSS: http://kwtrain.com/rss

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Introduction to QoS - 19 Minutes of QoS Goodness

This video identifies the need for Quality of Service (QoS) and gets you acquainted with several QoS tools.

This video is a sample from my new CompTIA Network+ (N10-006) Complete Video Course, and it’s available for purchase HERE.

Also, be sure to check out my other Complete Video Courses:

CCNA Complete Video Course

CCNP R/S 2.0 Complete Video Course Library

ROUTE (300-101) Complete Video Course

SWITCH (300-115) Complete Video Course

TSHOOT (300-135) Complete Video Course

Enjoy your studies!

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945, CCSI 20061

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