One of the most challenging aspects when studying for the CCDE practical is to find scenarios to practice with. It’s difficult to find a scenario that has enough background information, requirements and constraints to emulate the experience of the real
On May the 17th I passed the CCDE practical in Madrid and became Swedens 2nd CCDE, CCDE #20160011. This post describes my journey to passing the CCDE practical in my 1st attempt and the materials that I used to do
Hi everyone. I’ve not been posting lately because I have been studying very hard for the CCDE practical. Passed the lab in Madrid? Isn’t this guy from the North? I was supposed to take this exam in Frankfurt on Tuesday
Introduction In the previous post I showed some of the options to interconnect two AS so that a customer can buy a VPN in two different locations from two different SPs. There is another technology called Carrier Supporting Carrier or
Introduction Sometimes a customer needs a L3 VPN between two locations where the same SP is not present. This can be on a national or international basis. It would be possible to buy an Internet circuit and run an overlay
Introduction BGP Confederations are one of two tools a network designer has to work around the full mesh requirement of iBGP. BGP confederations are defined in RFC 5065 which obsoletes RFC 3065. This is how the RFC defines BGP confederations:
Introduction This post will look at the steps involved in BGP convergence and how it interacts with IGP to converge. Any network of scale will use route reflectors (RRs) so this post will focus on deployments with RRs. Networks running
This post will describe some of the crypto design considerations for DMVPN. DMVPN Overview and Crypto Overhead First let’s have a quick recap of what Dynamic Multipoint VPN (DMVPN) is. DMVPN is an overlay technology where multi point GRE tunnels
Introduction to GET VPN GET VPN is a Cisco proprietary technology aimed for private WAN designs where there is a need to encrypt the traffic. This may be due to regulatory requirements or just a need to keep traffic private.
I’m preparing for the CCDE practical and I was doing a practice scenario by Jeremy Filliben and I realized that I’m not comfortable with all of the WAN speeds so I might as well write a blog post on it.