ONUG Board Member Nick Lippis answers our questions about the SDx market, including what's ahead for the ONUG community, and what we can expect to see in the coming months.
Please join us in congratulating the following iPexpert client’s who have passed their CCIE lab!
Vishal Arora, CCIE #48027
“I have passed my CCIE-Wireless track and my CCIE# 48027. I would like to thanks to entire iPexpert family specially Jeff Rensink for their support. I have used expertise study material of iPexpert and that has helped me a lot in passing this prestigious exam.”
Have you passed your CCIE lab exam and used any of iPexpert’s self-study products, or attended a CCIE Bootcamp? If so, we’d like to add you to our CCIE Wall of Fame!
For those of you who have worked in large companies, it’s common territory to be stuck riding waves on a ship without a sail. Said ship also has its anchor out, but the deck hands have forgot about that and the captain never logged it. The anchor is being dragged around due to the ship bobbing up and down on the waves, dragging a number of artifacts along at the same time and giving some image of movement. Sometimes the ship and crew head in the right direction but no one really knows what that is due to the ever whirring compass from a dodgy purchase and blocked views of the stars due to persistent clouds.
Fear not, this isn’t a terribly written nautical blog or a write up of a lost ship; it’s a description of a large-scale enterprise IT project.
This one particularly made me laugh. A lot of projects feel like this!
In software development, there are numerous approaches to projects. A well known one is the waterfall method. It starts at the top follows a sequential path through the various phases. This methodology is unconsciously followed in enterprise projects through initiation, discovery, design, deployment and Continue reading
A Tor for enterprise applications?
Let’s take a look at EIGRP and the state a route can get into where EIGRP tells you “FD is Infinity”.
First of all, every EIGRP speaker maintains a local database called the EIGRP topology table which holds a copy of every route received from every neighbor and every route being advertised by the local system. EIGRP performs its best-path decision process on the entries in this table in order to determine which routes are the best and then hands those best routes to the Routing Information Base (the RIB). By inspecting the entries in this table, you can see things like:
I’ve used superscript numbers (x) in the output below to indicate where each item in the list above is found.
R12#show ip eigrp topology 10.1.11.0/24
EIGRP-IPv4 Continue readingOn the 24th of March, the pilot of Germanwings flight 4U9525 into a field, killing everyone on board, including himself. This is a human tragedy — beyond what many of us will experience in our lifetimes. But it’s also an important object lesson to those of us who live in the world of engineering. Think through the entire realm of airline safety that has been put into place since the terrorist attacks on the 11th of September in 2001.
The list feels almost endless to the person on the receiving end of all these new measures. The pilot, in this case, either bypassed the protection, or used it to his advantage. Advanced scanning machines, liquids restrictions, and laptop inspections can’t prevent someone intent on harming lots of people if they have control of the airplane itself. The locked cockpit door just created a “safe space” in which the co-pilot could work his plan out.
So what’s the point of Continue reading
As a listener to the podcast you’ve probably heard about Ansible once or twice already. In short Ansible is a simple IT automation tool. It’s often mentioned together with Puppet, however a big difference is that Ansible is agentless. Using Puppet assumes that you have a Puppet agent installed on the nodes that you want […]
The post Getting Ansible to talk to your Cisco devices appeared first on Packet Pushers Podcast and was written by Patrick Ogenstad.
Network Computing recently published my “Yes, NFV Is Important For The Enterprise” article. Short summary: NFV is (like BGP and MPLS) yet another technology that is considered applicable only to service provider networks but makes great sense in some enterprise contexts.
I’ll talk about enterprise aspects of NFV at Interop Las Vegas, and describe some NFV technical details and typical use cases in an upcoming webinar.
Last time we talked about a few things that go wrong in the IETF — this time we’ll talk about a few more things that can go wrong. Boiling the Ocean. Engineers, as a rule, like to solve problems. The problem is we often seem to think the bigger the problem, the better the solution. […]
The post HTIRW: Reality at the Mic (2) appeared first on Packet Pushers Podcast and was written by Russ White.
All About That YANG at the 92nd IETF Meeting
I was at the 92nd IETF meeting in Dallas a few weeks ago. I attended 16 sessions, mostly in the routing area, and every single one had a discussion about the YANG data model (indeed most had several such discussions).
YANG is the data modeling language for the NETCONF protocol. NETCONF/YANG was picked by the Interface to Routing System (I2RS) Working Group for an SDN controller to interact with IP/MPLS routers. It makes an IP/MPLS network programmable. There are other IETF protocols in play as well, such as Path Computation Element Protocol (PCEP). To make SDN management and orchestration (MANO) service aware, we need to bind these paths to the services they are intended for. This is where NETCONF/YANG data models come to the rescue. I was very pleased to see the attention NETCONF/YANG data models got at the IETF.
One thing that can hinder quick adoption and implementation for some data models is competing proposals. Indeed, some camps have formed around competing proposals. This is not unusual in the IETF. Different Internet-drafts (documents intended to be adopted by Continue reading
