IT Professionals Share SDN Expectations in New Research
By now, we all know the benefits of SDN, but what about its challenges? New research lays out the expectations of IT professionals.
By now, we all know the benefits of SDN, but what about its challenges? New research lays out the expectations of IT professionals.
It seems like just yesterday I was at CiscoLive in San Francisco asking people I had met on twitter about their experiences blogging as well as hosting a web page. Today? Last week marked the 1 year anniversary of “Networking With Fish”.
I want to say thank you.
Those of you who know me, know that I’m not much on the idea of one person’s success being solely on them. That can be a philosophical debate for some other day. But suffice it to say I had nothing to do with the IQ or EQ I was born with. Also while I was studying for my certifications…. I was reading documents and books that other people wrote.
So too with success of Networking With Fish.
So please indulge me for one moment on this 1 year Anniversary to say “thank you” to all those who were instrumental in the success of this web site. Your mug is in the mail.
Russ White – Much starts with Russ. My CiscoLive career started because he asked me to be a speaker for CiscoLive 2006. My becoming a CiscoLive Session Group Manager is because he Continue reading
In the last two posts I described tools to validate the required intermediate SSL certificate chain for a given server certificate, and to validate that the private key and server certificate are a match. Once the SSL configuration is deployed though, how do we check that everything is working correctly and the new certificate is in place?
The simple answer is “use one of the tools already out there on the Internet.” That’s a fair answer, and I have been known to use some of these. A quick Google search shows a validator on SSLShopper:
There’s also a similar tool on DigiCert:
These are great tools and I strongly encourage using them to check your sites. However, there’s one situation where they can’t help you, and that’s when your site is only accessible internally. How do I do certificate validation for private sites?
Yet again, OpenSSL is my tool of choice because not only can it open an SSL connection to a VIP, but it can also show the certificates it is sent. You may be thinking “Why not just use a web browser?” Again, Continue reading
Steel ORCA has eventual plans for Avaya's Fx architecture for SDN.
Ivan has posted a reaction to Ethan, which prompts me to… Okay, let’s start at the beginning. Ethan wrote a nice post on SD-WAN and the “shortest path we always wanted,” covering some of the positive and negative aspects of software defined WAN.
Ivan responded with this post, in which he says several interesting things, prompting some thoughts from yours truly…
Routing in SD-WAN environment is almost trivial…
Depends on what you mean when you say “routing…” If routing here means the discovery of the topology, and computing a best path through a topology, then controller based (centralized) “routing” is almost certainly more complex than distributed routing protocols. If routing here means, “take into consideration a wide swath of policies, including which link is most loaded right now, which link has the shortest queues, and lots of other things, and compute me a best path,” then a controller based centralized system is most likely going to be less complex. Take a gander through my last set of NANOG slides if you want to see where my thinking lies in this area — or read my new book on network complexity if you want a longer explanation.
The question is — Continue reading
The post Worth Reading: Currency and the Cloud appeared first on 'net work.
Price uncertainty in the public cloud has taken a serious turn for the worse.
The post Musing: Currency Fluctuations and Cloud Computing appeared first on EtherealMind.
Ethan Banks recently wrote a nice blog post detailing the benefits and drawbacks of traditional routing protocols and comparing them with their SD-WAN counterparts.
While I agree with everything he wrote, the comparison between the two isn’t exactly fair – it’s a bit like trying to cut the cheese with a chainsaw and complaining about the resulting waste.
Read more ...The GNS3 development team produced a major new release, version 1.0, in October 2014. Since then, they have been regularly updating GNS3 and, at the time I write this, the latest version of GNS3 is version 1.3.7.
The latest version of GNS3 cannot be installed using a package manager like Ubuntu Software Center or Synaptic because no packages have been created yet for GNS3 1.x. The Ubuntu repository and the GNS3 PPA only provide packages for old versions of GNS3. The latest version of the GNS3 package for Debian/Ubuntu is GNS3 0.8.7.
The GNS3 development team is working on packages for GNS3 1.x but, as of the time I post this, it is not clear when they will be available.
To install the latest version of GNS3 on an Ubuntu Linux system, install the dependencies, download the GNS3 source files, and compile the software. I provide the list of commands in this post.
We will use GNS3 to build a simulated network consisting of open-source routers, switches, and hosts so we only need to install the GNS3 GUI, the GNS3 Server, and VPCS. However, in the sections below, Continue reading