OSPF inter-area and intra-area routing rules
The following lab focuses on intra-area and inter-area route selection process. For the sake of clarity, I put the final conclusions first, wrapped in a table form, with some explanations to ponder upon, followed by the different lab cases used to check OSPF route selection rules. For each case, I used interface costs and states […]
OSPF routing protocol
OSPF Open shortest path first is a dynamic routing protocol which creates a topology between the routers to distribute routing information inside an Autonomous system. If you are not familiar with OSPF, don’t worry ! In this article OSPF will be explained in great detail. Are you interested in design aspect of OSPF, many OSPF design examples will […]
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Open Source Networking
We’ve heard a lot of Software Defined Networking (SDN), Open Networking, APIs, and policy models over the past few months (and years). There are days where it’s sickening to hear the term SDN, but even on those darkest days, the reality is that the network industry has a bright and open future. In this post, I’m going to share a list of networking projects that I’m aware of that are not only open, but also open source. It is definitely eye opening and extremely positive to see so much open source activity in the network industry.
From the movie Daylight starring Sly Stallone ++ Source: Flickfacts.com
OpenDaylight (ODL) – established in April 2013 is an open source Software Defined Networking (SDN) controller platform(s). There are different controller platforms for different use cases.
OpenFlow (OF) – established in the late 2000s, the OpenFlow 1.0 release launched in December 2009. The Open Networking Foundation took over the development (not actually coding) of OpenFlow when ONF formed in late March / early April in 2010.
Open vSwitch (OVS) – established in mid to late 2009 by the Nicira team to replace the standard Linux bridge. It’s Continue reading
OpenFlow (OF) – established in the late 2000s, the OpenFlow 1.0 release launched in December 2009. The Open Networking Foundation took over the development (not actually coding) of OpenFlow when ONF formed in late March / early April in 2010.
Open vSwitch (OVS) – established in mid to late 2009 by the Nicira team to replace the standard Linux bridge. It’s Continue reading
News Analysis: Cumulus Linux 2.5 Released + Validated Design Guides
One of my favorite companies to talk to and keep track of is Cumulus Networks, makers of Cumulus Linux, a network operating system that runs on whitebox switches. As I’m not in a build phase on the network I do most of my work on, I haven’t had a chance to try Cumulus Linux […]Lock-In Is Inevitable – Get Used to It!
For whatever reason (subliminal messages from vendor marketing departments?), I’m constantly brooding about the vendor lock-in, its inevitability, and the way supposedly disruptive companies try to use the fear of lock-in to persuade na├»ve customers to buy their products.
Read more ...BGP in 2014
The Border Gateway Protocol, or BGP, has been holding the Internet together, for more than two decades and nothing seems to be falling off the edge so far. As far as we can tell everyone can still see everyone else, assuming that they want to be seen, and the distributed routing system appears to be working smoothly. All appears to be working within reasonable parameters, and there is no imminent danger of some routing catastrophe, as far as we can tell. For a protocol designed some 25 years ago, when the Internet of that time contained some 10,000 constituent networks, its done well to scale fifty-fold, to carry in excess of half a million routed elements by the end of 2014.Open Source Networking
We’ve heard a lot of Software Defined Networking (SDN), Open Networking, APIs, and policy models over the past few months (and years). There are days where it’s sickening to hear the term SDN, but even on those darkest days, the reality is that the network industry has a bright and open future. In this post, I’m going to share a list of networking projects that I’m aware of that are not only open, but also open source. It is definitely eye opening and extremely positive to see so much open source activity in the network industry.
Edit/Note: updated list can be found here on GitHub. Feel free to issue a pull request to add or modify the list.
OpenDaylight (ODL) – established in April 2013 is an open source Software Defined Networking (SDN) controller platform(s). There are different controller platforms for different use cases.
OpenFlow (OF) – established in the late 2000s, the OpenFlow 1.0 release launched in December 2009. The Open Networking Foundation took over the development (not actually coding) of OpenFlow when ONF formed in late March / early April in 2010.
Open vSwitch (OVS) – established in mid to late 2009 by the Nicira team to Continue reading
January’s Network Resolution Mission
Hope everyone had a great holiday season and is getting back into the groove of things. Firstly wanted to thank those who participated inOSPF Authentication – Part 1
Original content from Roger's CCIE Blog Tracking the journey towards getting the ultimate Cisco Certification. The Routing & Switching Lab Exam
There are three types of OSPF authentication. Type 1 – no authentication Type 2 – clear text Type 3 – cryptographic (MD5 or SHA) Lets explore each type in a lot more detail and then look at the router configuration for some real world examples. Authentication can be configured on a per area or per... [Read More]
Post taken from CCIE Blog
Original post OSPF Authentication – Part 1
Building a Business Case for a SDN Deployment
This is the second in my series on SDN, with the SDN Ecosystem I posted last week to get us all started. As a new trend begins toCisco Reveals New Products – The Time of Multigigabit is Here
Wireless networks are becoming faster and faster. With 802.11ac Wave 2, wireless networks will be capable of achieving speeds up to 6.8 Gbps. This creates challenges when connecting APs to switches which normally run Ethernet at 1GE or 10GE. To meet these evolving demands, Cisco has as of today revealed some new products.
Cisco is releasing a new compact switch supporting multigigabit technology, the Cisco Catalyst 3560-CX. The most compelling new features are support for multigigabit interfaces, more power available for PoE, support for 10GE on the uplinks and being able to be deployed as an Instant Access switch. It also support PoE pass through which can help save on long cable runs. The Catalyst 3560-CX supports two multigigabit interfaces.
This device is fanless, so it can be deployed in cubicles to decrease the need for a wiring closet. It also has the support for role based security. Cisco’s goal is to provide for a better working environment, which they call “Next Generation Workspace”.
If you are a technical person, you are probably wonder about the multigigabit ports. IEEE only has 1GE, 10GE and so on. Cisco started the NBASE-T Alliance with Aquantia, Freescale, and Xilinx. Other members Continue reading
New Software Release
If you haven't jumped on it yet - GNS3 Download has the new GNS3 v1.2.3 for download. You can check out the feature updates in GNS3Making Your Wireless Guest Friendly
During the recent Virtualization Field Day 4, I was located at a vendor building and jumped on their guest wireless network. There are a few things that I need to get accomplished before the magic happens at a Tech Field Day event, so I’m always on the guest network quickly. It’s only after I take care of a few website related items that I settle down into a routine of catching up on email and other items. That’s when I discovered that this particular location blocked access to IMAP on their guest network. My mail client stalled out when trying to fetch messages and clear my outbox. I could log into Gmail just fine and send and receive while I was on-site. But my workflow depends on my mail client. That made me think about guest WiFi and usability.
Be Our (Limited) Guest
Guest WiFi is a huge deal for visitors to an office. We live in a society where ever-present connectivity is necessary. Email notifications, social media updates, and the capability to look up necessary information instantly have pervaded our lives. For those of us fortunate enough to still have an unlimited cellular data plan, our connectivity craving Continue reading
DDoS Attacks in the Wake of French Anti-terror Demonstrations
On January 15th, France’s chief information systems defense official, Adm. Arnaud Coustilliere, announced a sharp rise in online attacks against French web sites:
“Calling it an unprecedented surge, Adm. Arnaud Coustilliere, head of cyberdefense for the French military, said about 19,000 French websites had faced cyberattacks in recent days, …” [1].
As we’ve done in the recent past for North Korea [2], Hong-Kong [3], and Israel [4], we can leverage Arbor’s ATLAS initiative to observe how real world conflict is reflected in the digital realm. ATLAS receives anonymized Internet traffic and DDoS event data from over 330 participating Internet Service Providers worldwide. In particular, we are interested in DDoS attacks before and after Sunday, January 11th. As reported in [1],
“Coustilliere called the attacks a response to the massive demonstrations against terrorism that drew 3.7 million people into the streets Sunday across France.”
In order to gauge this response, we compare the DDoS attacks that took place between January 3rd and January 10th to the DDoS attacks that took place between January 11th and January 18th inclusive.
Attack Frequency
Between January 3rd and January 18th, a total of 11,342 Continue reading
That HP SDN App Store
December 2014 found me in Barcelona as a guest of HP at the “HP Discover” event. Nominally I went to see what was up in the world of networking, but as you can imagine with the breadth of products that HP produces, I found myself looking at all sorts of things. I’ll cover a few fun things in other posts, but I’ll start with a bit of networking because, well, this is MovingPackets after all.
HP SDN App Store
I mentioned the HP SDN App Store in a previous post about HP Openflow. One of the fears I raised was how an App Store would work in terms of support. Talking to a contact at HP made things a little clearer, and there’s actually quite a nice – and perhaps obvious – support plan for the Apps you can download. Effectively, there are three tiers of supported applications as I understand it, and a glance at the App Store shows that these are now called “Apps Circles”:
- App Circle 1: Apps that HP develops. These have full support direct from HP, as they are HP products, effectively.
- App Circle 2: Apps that are developed by HP AllianceOne partners Continue reading
News Analysis: Anuta NCX 4.0 Feature Updates for OpenStack, NFV, YANG
Anuta Networks’ NCX platform is for multi-vendor orchestration at scale. NCX fits in the SDN space, allowing operators to create service catalogs that can be deployed across a wide variety of gear from various networking vendors, including Cisco, Juniper, Brocade, and Ericsson. I co-hosted a webinar with a live demo of an earlier version […]Field Trip: Networking Field Day
Very excited to announce I was invited to participate in Networking Field Day #9. The first question is: What is Networking Day? Well it is an event where we (networkers) get to participate, listen, and interact with various different vendors. And I’ll be joining a great group, a few of which I’ve met at the […]