Part 1: Getting Inside the Loop
Part 2: Orientation
Part 3: Decide!
Once you’ve observed, oriented, and decided, it’s time to act. This might seem like a minor concept, but it’s actually really, really hard to act in a lot of situations. There are two elements here — the first is our willing suspension of belief, and the second is the doubt storm. Let’s talk about these two.
The willing suspension of belief. To find an example here, I’m going to fall back on my training in self defense. When you first find yourself in any situation that is “bad,” your first line of thought is going to be “this isn’t really happening,” or “why would this person want to hurt me?” In the same way, when your network is failing or under attack, the easiest thing in the world is to disregard the loop, roll over, and go back to sleep. Why would anyone attack my network? Why would this bug be hitting my control plane? Like Scrooge faced with a ghost, we say, “there’s more gravy than grave about you.” And this is a grave mistake. There’s a reason you’ve gone through all the trouble of Continue reading
I had a great SDN-focused conversation with Terry Slattery during last Interop New York, ago and of course we came to the argument that the CLI is the root of all evil, which started my usual rant. Guess what: not surprisingly that wasn’t what Terry had in mind. He was using the “CLI mentality is bad” as a synonym for “we’re used to configuring our networks one box at a time” (so we should really be talking about box-focused mentality).
Read more ...This is a continuation from Part 1 9. ACME VPN RR’s Design: So the current total number of PE’s dedicated for VPN functionality is around 400 (2 PE’s in each POP x 200). A full iBGP mesh between 400 PE’s comes around 79,800 sessions ((400×399) /2). By introducing two VPN RR’s each PE will have only two iBGP sessions […]
The post BGP RR Design – Part 2 appeared first on Packet Pushers Podcast and was written by Diptanshu Singh.
1. Introduction In this post we will be looking at large scale RR design by using a fictional ISP ACME as a reference. As usual, I am assuming that the reader has familiarity with BGP and basic RR concepts. 2. Setting the Stage ACME is a communications company providing communications and data services to residential, business, governmental and wholesale customers. […]
The post BGP RR Design – Part 1 appeared first on Packet Pushers Podcast and was written by Diptanshu Singh.
Original content from Roger's CCIE Blog Tracking the journey towards getting the ultimate Cisco Certification. The Routing & Switching Lab Exam
The Cisco Access Point Default Password is – Cisco / Cisco You could probably have guessed that, but if you are configuring a cisco wireless access point out of the box for the first time you are going to want to know the default password and if you are reading this then you haven’t been... [Read More]
Post taken from CCIE Blog
Original post Cisco Access Point Default Password