Clik here to view.
Inter-AS mVPNs: MDT SAFI, BGP Connector & RPF Proxy Vector
Abstract: Inter-AS Multicast VPN solution introduces some challenges in cases where peering systems implement BGP-free core. This post illustrates a known solution to this problem, implemented in Cisco...
View ArticleClik here to view.
Anomalies in BGP: Part I
Introduction In this series of posts, we are going to review some interesting topics illustrating unexpected behavior of the BGP routing protocol. It may seem that BGP is a robust and stable protocol,...
View ArticleClik here to view.
Move over Variance: BGP Proportional Load Balancing is here!
Having a blast in Chicago with the RS bootcamp students. Thanks for all the hard work you are doing this week! A student from a past Reno class, named Michal, asked if I would create a blog post...
View ArticleClik here to view.
A Sham-Link, Really? Yes, and it’s not used for Phishing!
One of our students in the INE RS bootcamp today, asked about an OSPF sham-link. I thought it would make a beneficial addition to our blog, and here it is. Thanks for the request Christian! Reader’s...
View ArticleClik here to view.
BGP: The Big Gory Protocol (Can you troubleshoot it?)
It isn’t my fault, they configured it that way before I got here! That was the entry level technician’s story Monday morning, and he was sticking to it. Here is the rest of the story. Over the...
View ArticleClik here to view.
Troubleshooting tips for MPLS
Last week we wrapped up the MPLS bootcamp, and it was a blast! A big shout out to all the students who attended, as well as to many of the INE staff who stopped by (you know who you are ). Thank...
View ArticleClik here to view.
Riddle me this BGP man…
Our BGP class is coming up! This class is for learners who are pursuing the CCIP track, or simply want to really master BGP. I have been working through the slides, examples and demos that we’ll use...
View ArticleClik here to view.
Understanding BGP Convergence
Introduction BGP (see [0]) is the de-facto protocol used for Inter-AS connectivity nowadays. Even though it is commonly accepted that BGP protocol design is far from being ideal and there have been...
View ArticleClik here to view.
Understanding BGP MED and BGP Deterministic MED
The BGP MED attribute, commonly referred to as the BGP metric, provides a means to convey to a neighboring Autonomous System (AS) a preferred entry point into the local AS. BGP MED is a non-transitive...
View ArticleClik here to view.
IOS XR Teaser – BGP as PE to CE for MPLS L3VPN
Update: Congrats to Mark, our winner of 100 rack rental tokens for the first correct answer, that XR2 is missing a BGP router-id. In regular IOS, a router-id is chosen based on the highest Loopback...
View Article
