Configuring VRF-Lite

ccie r/s ccnp r/s Jun 07, 2016

You’re probably familiar with the concept of virtualization, where you can run multiple virtual servers on a single physical server. However, did you know that you can run multiple virtual routers inside a single physical router?

 

That’s possible with a really cool Cisco IOS feature called VRF-Lite. This video shows you how to perform a basic configuration of this exciting virtualization technology.

 

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

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

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Multicast Routing on Cisco Routers

ccie r/s Apr 19, 2016

In this new video, you’ll get a simplified, yet comprehensive, look at multicast routing on Cisco routers. This video is appropriate if you work with multicasting in the real world or if you’re studying for your CCNA, CCNP, or CCIE Routing and Switching.

Some of the topics include:

  • The Benefit of Multicasting
  • IPv4 Multicast Addressing
  • IPv6 Multicast Addressing
  • Exercises: Constructing Multicast MAC Addresses
  • IGMP (versions 1, 2, and 3)
  • Reverse Path Forwarding (RPF) Check
  • PIM Dense Mode
  • PIM Sparse Mode
  • Live Demos (PIM-DM, PIM-SM, & Auto RP)

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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Fundamentals of VRF-Lite

ccie r/s ccnp r/s Feb 24, 2016

Have you ever used some sort of virtualization software (e.g. vmware) to get multiple virtualized servers running on a single physical server? It’s a great way to save resources, by eliminating the need for extra physical servers. Well, similar to how we can virtualize multiple servers on a single physical server, we can virtualize multiple routers on a single physical router.

Each of these virtual routers can have their own independent IP routing table and are logically isolated from the other virtual routers residing in the same physical router. This can offer a solution to service providers wanting to keep their customers’ network traffic (including the IP routing tables of customers’ routers) isolated from one another. Or, in a large enterprise, perhaps you have a design requirement to segregate different applications (e.g. voice, video, and data).

One solution Cisco offers to make this router virtualization possible is called VRF-Lite. Some literature...

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Book Review: CCIE Routing and Switching v5.0 Official Cert Guide Library (5th Edition)

ccie r/s Jan 28, 2016

If you’re preparing for the CCIE R&S Written Exam or Lab, you need a collection of training materials. Perhaps you watch some training videos; you download a few whitepapers from Cisco’s website; and you read some solid Cisco Press books. For example, Routing TCP/IP Volume I and Volume II by Jeff Doyle should definitely be on your reading list.

Another recent contender, and the focus of this book review, is CCIE Routing and Switching v5.0 Official Cert Guide Library (5th Edition) by Narbik Kocharians, Peter Paluch, and Terry Vinson. The library is a collection of two volumes. Here’s a high-level overview of the content in each volume:

Volume 1

  • Layer 2 Technologies
  • IP Addressing and Services
  • IGPs (e.g. RIP, EIGRP, OSPF, IS-IS, and Route Redistribution)

Volume 2

  • BGP
  • Quality of Service (QoS)
  • WAN Technologies
  • Multicast
  • Security
  • MPLS

You can check out a sample chapter (on QoS) HERE.

I’ve recently been reading through these two books and...

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CCIE Lab Builder – Review

ccie r/s Jan 12, 2016

Amajor challenge for CCIE R/S Lab candidates is getting their hands on a huge topology, similar to what they’ll face in the actual lab. One option is to use the CCIE Lab Builder, and you can check out my review here.

You can purchase the CCIE Lab Builder here: http://kwtrain.com/ccielabbuilder

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

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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Troubleshooting Route Redistribution

ccie r/s ccnp r/s May 15, 2015

This video shows you how to troubleshoot a route redistribution scenario with multiple redistribution points.

This video is a sample from my new CCNP R/S v2 Complete Video Course Library (which includes the ROUTE, SWITCH, and TSHOOT Complete Video Courses ), and it’s available for preorder HERE.

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

CCNA Complete Video Course

ROUTE Complete Video Course

SWITCH Complete Video Course

TSHOOT Complete Video Course

Enjoy your studies!

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

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Troubleshooting OSPF Neighborships

ccie r/s ccnp r/s Apr 23, 2015

In this new video, you’ll learn common issues that can prevent an OSPFv2 neighborship from forming. Then, you’ll walk through a sample OSPF troubleshooting scenario.

 

This video is a sample from my new TSHOOT 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

ROUTE Complete Video Course

SWITCH Complete Video Course

Enjoy your studies!

 

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

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Gateway Load Balancing Protocol (GLBP)

ccie r/s ccnp r/s Jan 01, 2015

Happy New Year!

If one of your goals for 2015 is to earn your CCNP R/S certification, you might want to check out a new video I did.


The video discusses the theory of GLBP, a First Hop Redundancy Protocol (FHRP) that’s much more than just an FHRP.

The video is one of the videos in my new SWITCH (300-115) Complete Video Course available for pre-order from Cisco Press.

You get pre-order the video course here: http://kwtrain.com/switchcourse

I hope you enjoy the video and that you make 2015 your best year yet.

Take good care,

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

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BGP Peer Groups

ccie r/s ccnp r/s Nov 26, 2014

This video from my ROUTE Complete Video Course demonstrates how BGP Peer Groups can help conserve a router’s CPU resources if the router is doing BGP route filtering with multiple BGP neighbors.

 

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