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
There has been a lot happening around VIRL the last few weeks. A new release of VIRL just got released and today the VIRL team announced that they are adding support for running VIRL in the cloud. Cisco has chosen
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 currently working on a design and needed to verify some failover behavior of the Cisco ASA firewall. The ASA can run in active/active or active/standby mode where most deployments I see run in active/standby mode. When in a failover
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.
Summary: By preparing a plan and strategy for the CCIE lab, the chance of passing will be a lot higher. Over the years I have written about the CCIE multiple times and also mentored people on how to prepare for the
This post will briefly discuss the challenges of manually setting up MPLS-TE tunnels and how Auto Tunnels can lessen the burden of MPLS-TE tunnels. One of the main challenges with traffic engineering and MPLS-TE is the number of tunnels that
To kick off the new year, I will give you a review of the CCDE Practical Workbook by Orhan Ergun, CCIE #26567 and CCDE #2014:17. Orhan is a friend and has provided the workbook to me for reviewing. I would