I've had some great discussion with the OpenDaylight OVSDB team around NETCONF, YANG, RESTCONF and what network operations will look like in an SDN world. This post summarizes where my head is at on this subject.
I've had some great discussion with the OpenDaylight OVSDB team around NETCONF, YANG, RESTCONF and what network operations will look like in an SDN world. This post summarizes where my head is at on this subject.
NETCONF is defined in RFC 6241 which describes it as follows:
The Network Configuration Protocol (NETCONF) defined in this document provides mechanisms to install, manipulate, and delete the configuration of network devices. It uses an Extensible Markup Language (XML)-based data encoding for the configuration data as well as the protocol messages. The NETCONF protocol operations are realized as remote procedure calls (RPCs).
It's not a new technology, as work started on this approximately 10 years ago, but what it gives us is an extensible and robust mechanism for managing network devices.
NETCONF understands the difference between configuration data and state data. As somebody who has been bitten by trying to perform a create operation and faced validation issues as I've mistakenly sent (or worse, edited) a read-only field in a request, I feel this is really valuable.
Another great thing from an operations perspective is the ability to test/validate configuration before it's applied to the device. NETCONF allows you Continue reading
I've had some great discussion with the OpenDaylight OVSDB team around NETCONF, YANG, RESTCONF and what network operations will look like in an SDN world. This post summarizes where my head is at on this subject.
I would love to share article by Mbong Ekwoge explaining different Flavors of MPLS ,that can help you to clear any confusion about MPLS ,ATOM and VPLS….
MPLS is the enabler of all these fancy services and applications we hear about today, such as MPLS VPNs, AToM (Any Transport over MPLS), MPLS TE (Traffic Engineering), etc.
In order to clearly understand what VPLS is, you need to understand what led to the “birth” of VPLS (Virtual Private LAN Service). It all began with MPLS VPNs. The client had to form a peer-to-peer relationship with the Provider’s PE routers. What this means is that the provider is intricately involved with routing and forwarding the customer’s traffic and some customers did not like this idea. Also, providers had invested heavily into Layer 2 VPN techniques such as ATM, Frame Relay, etc and completely eliminating these overlay VPN techniques didn’t feel right with their financial people. Some engineers did not like the idea of having to let go of their beloved ATMs, Frame Relay PVCs for some new chap coming in.
This led Cisco and IETF to develop a solution which would let you run MPLS in the core but users Continue reading
Our attendance at the Open Networking Symposium promotes a discussion of events there.
The post Coffee Break – Show 5 appeared first on Packet Pushers.
Our attendance at the Open Networking Symposium promotes a discussion of events there.
The post Coffee Break – Show 5 appeared first on Packet Pushers Podcast and was written by Greg Ferro.
Dear all, I am happy to announce new version of phpipam IP address management – version 1.0. 
New features, like changelog, favourite subnets, upgraded UI with bootstrap3 and other were introduced, and also lots of improvements and bug fixes are included. Most important are:
If you find phpIPAM useful for your company donations would be highly appreciated 
You can demo it here: http://demo.phpipam.net/
You can download it on sourceforge site: phpipam-1.0.
Special thanks to all the people submitting bug reports, translators and feature testers!
Screenshots:
Full changelog for this release is:
New features:
----------------------------
+ IP address page with IP address details and IP history (Changelog);
+ IP address changelog, subnet and section changelogs with full changelog under tools;
+ Favourite subnets for quick access;
+ Adding subnets from free space with automatic mask provided;
+ Automatic database validity check after upgrading and automatic field/table fix under administration;
+ Automatic weekly check for new phpipam Continue reading
Do not tell anyone I told you, but I heard a rumor today. It looks like the attendees will be in for quite a treat for the 25th Anniversary of the Customer Appreciate Event. It seems that we’re all going to be shipped off to AT&T Park for the show! It’s the home of the San Francisco Giants and a beautiful stadium. And guess who’s going to be there? Yes, me. And my wife. And about 984572 of my friends. But so will Lenny Kravitz and Imagine Dragons!
AT&T Park I can’t imagine a better place to spend the evening with your friends than here. McCovey Cove. The Giants Wall of Fame. The 1927 Glove. The Willie Mays statue. Ballpark food. And, for the network angle, it boasts one of the largest public hotspots in the world.
AT&T Park in San Francisco
Lenny Kravitz We all know he plays Cinna in the Hunger Games, but did you know he actually plays music on the side? I had no idea! Ok…maybe I did. And maybe I’m a fan. And maybe I’ve never read Hunger Games. (All are true, by the way.)
Lenny’s a Grammy winner. Four of them, to Continue reading
I recently rebuilt my laptop and reloaded the applications I use for pentesting including Virtualbox and Kali Linux. If you need help setting up Kali Linux in Virtualbox here is a great link that walks through the setup process.
Once I had Kali up and running in my virtual environment I plugged in my ALFA wireless adapter and made sure the USB device was running in the virtual environment.
I ran iwconfig to verify the wireless interface.
So far so good and I ran ifconfig to verify the interface was up, but the only interface returned was the loopback.
After discovering the wireless interface was not up and I ran ifconfig wlan0 up to bring it up and got the SIOCSIFFLAGS error.
I wrote about this error a while back when I was running Backtrack 5 and I first started using the Fern WiFi Cracker. I decided to expand on that post plus I was asked about creating a script to run all the commands at one time instead of typing them individually. The script should be run every time Kali is booted, but after your adapter is plugged in and recognized.
First open a text editor and type in the Continue reading
One of the critical decisions facing companies embarking on big data projects is which database to use, and often that decision swings between SQL and NoSQL. SQL has the impressive track record, the large installed base, but NoSQL is making impressive gains and has many proponents. We put the question to experts in both camps.
CTO, of VoltDB says SQL has already earned its stripes in large organizations and big data is just one more job that this stalwart can shoulder. View debate
To read this article in full or to leave a comment, please click here
So far we’ve explored some very cool features of CEF and the attributes we can push into the FIB to identify certain kinds of traffic. We can color the prefixes in the RIB and FIB with a particular IP-Precedence, QoS-group or traffic_index and we can then perform traffic monitoring, shaping and policing and packet marking […]
The post Secret CEF Attributes, Part 5 appeared first on Packet Pushers Podcast and was written by Dan Massameno.
The Management Challenges of SDN
Really, when we talk about SDN in the WAN, all we’re talking about is separating the control plane (which tells data where to go) from the data plane (which forwards traffic to the next node). We’ll still have physical routers and other infrastructure, but they’ll become “commodity forwarding devices” with the control plan intelligence residing in a server – the SDN controller. This enables us to create virtual network overlays and functions.
Where this can be a challenge is not so much in figuring out how to integrate it into your network but the lack of widely accepted standards for SDN. Certainly, the Open Networking Foundation is developing one, but it’s yet to see full adoption. And without standards for SDN, it will be difficult to build systems. Now the ONF and other consortia and standards bodies such as the IETF are making progress on this issue – and Packet Design will be part of the process by which progress is made – but until standards are fully established, SDN may be limited only to those companies willing to spend the massive amount of time Continue reading
