Basic: Cisco DMVPN Lab

Two of my areas I want to improve on the most when it comes to my CCIE R&S Studying are MPLS and DMVPN. I did labs on each today just configuring the basics and...

EIGRP Metric Calculation

Not going to lie, this post is for me. There is one small thing that I always forget when it comes to this formula that I will get to in a moment. The metric of...

5.3.a (i) HSRP, GLBP, VRRP

Overview In a business environment, there is something that is very valuable and a non-negotiable. That would be uptime. How do you achieve a great uptime? With redundancy. That is what this article will focus...

1.4.a (iii) Embedded Packet Capture

This post is regarding the section of the CCIE Blueprint - "1.4.a (iii) Embedded packet capture". I am jumping out of order with this post, but it came in handy recently, so I figured...

CCIE Routing and Switching Written Exam (400-101) Version 5.1

It has happened with exams over time and will happen with future exams: they get updated. That is exactly what is happening with the CCIE R&S Exam. The CCIE Routing and Switching exam is...

1.1.a (iii) L2 MTU

L2 MTU is defined as "maximum transmission unit" which represents the largest size of packets that an interface can transmit without the need to fragment. Overall, there are three types of MTU that need...

1.1.a (ii) errdisable recovery

Errdisable can be a great thing for a network as it will detect an error condition and then shut down a port from functioning to avoid any network issues. Errdisable recovery is the process...