Network Firefighters or Fire Marshals?
Throughout my career as a network engineer, I’ve heard lots of comparisons to emergency responders thrown around to describe what the networking team does. Sometimes we’re the network police that bust offenders of bandwidth polices. Other times there is the Network SWAT Team that fixes things that get broken when no one else can get the job done. But over and over again I hear network admins and engineers called “fire fighters”. I think it’s time to change how we look at the job of fires on the network.
Fight The Network
The president of my old company used to try to motivate us to think beyond our current job roles by saying, “We need to stop being firefighters.” It was absolutely true. However, the sentiment lacked some of the important details of what exactly a modern network professional actually does.
Think about your job. You spend most of your time implementing change requests and trying to fix things that don’t go according to plan. Or figuring out why a change six months ago suddenly decided today to create a routing loop. And every problem you encounter is a huge one that requires an “all hands on deck” mentality Continue reading
CCIE at 50k: Software Defined? Or Hardware Driven?
Congratulations to Ryan Booth (@That1Guy_15) on becoming CCIE #50117. It’s a huge accomplishment for him and the networking community. Ryan has put in a lot of study time so this is just the payoff for hard work and a job well done. Ryan has done something many dream of and few can achieve. But where is the CCIE program today? And where will it be in the future?
Who Wants To Be A CCIE?
A lot of virtual ink has been committed to opinions in the past couple of years about how the CCIE is become increasingly irrelevant in a world of software defined DevOps focused non-traditional networking teams. It has been said that the CCIE doesn’t teach modern networking concepts like programming or building networks in a world with no CLI access. While this is all true, I don’t think it diminishes the value of getting a CCIE.
The CCIE has never been about building a modern network. It has never been focused on creating anything other than a medium-sized enterprise network in the case of the routing and switching exam. It is not a test of best practices or of greenfield deployment scenarios. Instead, it has Continue reading
The Blame Pipeline
Talk to any modern IT person about shifting the landscape of how teams work and I can guarantee you that you’ll hear a bit about DevOps as well as “siloed” organizational structures. Fingers get pointed in all directions as to the real culprit behind dysfunctional architecture. Perhaps changing the silo term to something more appropriate will help organizations sort out where the real issues lie.
You Dropped A Bomb On Me
Silos, or stovepipes, are an artifact of reporting structures of days gone by. Greg Ferro (@EtherealMind) has a great piece on the evils of ITIL. In it, he talks about how the silo structure creates blame passing issues and lack of responsibility for problem determination and solving.
I think Greg is spot on here. But I also think that the love of blame extends in the other direction too. It is one thing to have the storage team telling everyone that the arrays are working so it’s not their problem. It’s another issue entirely when the CxO-level folks come down from the High Holy Boardroom to hunt for heads when something goes wrong. They aren’t looking to root out the cause of the issue. They want someone Continue reading
This WAN Is Your WAN, This WAN Is My WAN
Straw Bales on Hill Landscape, Tuscany, Italy
Ideas coalesce all the time in every vertical. You don’t really notice it until you wake up one day and suddenly everything around you looks identical. Wireless becoming the new access layer. Flash storage taking hold of the high end performance crown. And in networking we have the dominance of all things software defined. One recent development has coming along much faster than anyone could have predicted: Software Defined Wide Area Networking (SD-WAN).
Automatic For The People
SD-WAN is a force in modern networking because people want simplicity. While Ivan does a great job of decoupling marketing from reality, people still believe that SD-WAN is the silver bullet that will fix all of their WAN woes. Even during the original discussions of SD-WAN technology at conferences like ONUG, the overriding idea wasn’t around tying sites together or driving down costs to the point of feasibility. It was all about making life easier.
How does SD-WAN manage to accomplish this? It’s all black box networking. Just like the fuel injector in your car. There’s no crying about interoperability or standards-based protocols. You just plug things in and it all works, even if Continue reading
Why Are These Slides Marked Confidential?
Imagine you’re sitting in a presentation. You’re hearing some great information from the presenter and you can’t wait to share it with your colleagues or with the wider community. You are just about to say something when you look in the corner of the slide and you see…
Confidential Information
You pause for a moment and ask the presenter if this slide is a secret or if you should consider it under NDA. They respond that this slide can be shared with no restrictions and the information is publicly available. Which raises the question: Why is a public slide marked “confidential”?
I Fought The Law
The laws that govern confidential information are legion. Confidential information is a bit different than copyrighted information or intellectual property that has been patented. In most cases, confidential information is treated as a trade secret. Trade secrets can be harmful if they are divulged, since a trade secret can’t be patented.
A great example is the formula for Coca-Cola. If they tried to patent it they would have to write down all the ingredients. While that would protect the very specific formulation of their drink it would also allow their competitors to create something extremely Continue reading
SDN and the Trough Of Understanding
An article published this week referenced a recent Hype Cycle diagram (pictured above) from the oracle of IT – Gartner. While the lede talked a lot about the apparent “death” of Fibre Channel over Ethernet (FCoE), there was also a lot of time devoted to discussing SDN’s arrival at the Trough of Disillusionment. Quoting directly from the oracle:
Interest wanes as experiments and implementations fail to deliver. Producers of the technology shake out or fail. Investments continue only if the surviving providers improve their products to the satisfaction of early adopters.
As SDN approaches this dip in the Hype Cycle it would seem that the steam is finally being let out of the Software Defined Bubble. The Register article mentions how people are going to leave SDN by the wayside and jump on the next hype-filled networking idea, likely SD-WAN given the amount of discussion it has been getting recently. Do you know what this means for SDN? Nothing but good things.
Software Defined Hammers
Engineers have a chronic case of Software Defined Overload. SD-anything ranks right up there with Fat Free and New And Improved as the Most Overused Marketing Terms. Every solution release in the last two years Continue reading
TECH.unplugged And Being Present
I wanted to let everyone know that I’m going to be taking part in an excellent event being put on by my friend Enrico Signoretti (@ESignoretti) this September. TECH.unplugged is a jam-packed day of presentations from people that cover storage, computing, and in my case networking. We’re getting together to share knowledge and discuss topics of great interest to the IT community. As excited as I am to be taking part, I also wanted to take a few moments to discuss why events like this are important to the technology community.
WORM Food
There’s no doubt that online events are becoming the standard for events in recent years. It’s much more likely to find an event that offers streaming video, virtual meeting rooms, and moderated discussions taking place in a web browser. The costs of travel and lodging are far higher than they were during the recession days of yore. Finding a meeting room that works with your schedule is even harder. It’s much easier to spin up a conference room in the cloud and have people dial in to hear what’s going on.
For factual information, such as teaching courses, this approach works rather well. That’s Continue reading
The Score Is High. Who’s Holding On?
If you haven’t had the chance to read Jeff Fry’s treatise on why the CCIE written should be dropped, do it now. He raises some very valid points about relevancy and continuing education and how the written exam is approaching irrelvancy as a prerequisite for lab candidates. I’d like to approach another aspect of this whole puzzle, namely the growing need to get that extra edge to pass the cut score.
Cuts Like A Knife
Every standardized IT test has a cut score, or the minimum necessary score required to pass. There is a surprising amount of work that goes into calculating a cut score for a standardized test. Too low and you end up with unqualified candidates being certified. Too high and you have a certification level that no one can attain.
The average cut score for a given exam level tends to rise as time goes on. This has a lot to do with the increasing depth of potential candidates as well as the growing average of scores from those candidates. Raising the score with each revision of the test guarantees you have the best possible group representing that certification. It’s like having your entire group be Continue reading
Invalidating Identity Interdiction
It used to be that a data breach was a singular event that caused massive shock and concern. Today, data breaches happen regularly and, while still shocking in scope, are starting to dull the senses. Credit card numbers, security clearances, and even illicit dating profiles have been harvested, coallated, and provided for everyone to expose. It seems to be an insurmountable problem. But why?
Data Cake
Data is a tantalizing thing. Collecting it makes life easier for customers and providers as well. Having your ordering history allows Amazon to suggest products you might like to buy. Having your address on file allows the pizza place to pull it up without you needing to read your address again. Creating a user account on a site lets you set preferences. All of this leads to a custom experience and lets us feel special and unique.
But, data is just like that slice of cheesecake you think you want for dessert. It looks so delicious and tempting. But you know it’s bad for you. It has calories and sugar and very little nutritional value. In the same manner, all that data you collect is a time bomb waiting to be exposed. The more Continue reading
Objectivity Never Rests
Being an independent part of the IT community isn’t an easy thing. There is a lot of writing involved and an even greater amount of research. For every word you commit to paper there is at least an hour of taking phone calls and interviewing leaders in the industry about topics. The rewards can be legion. So can the pitfalls. Objectivity is key, yet that is something where entire communities appear to be dividing.
Us Or Them
Communities are complex organisms with their own flow and feel. What works well in one community doesn’t work well in another. Familiarity with one concept doesn’t immediately translate to another. However, one thing that is universal across all communities is the polarization between extremes.
For instance, in the networking community this polarization is best characterized by the concept of “ABC – Anything But Cisco”. Companies make millions selling Cisco equipment every year. Writers and speakers can make a very healthy career from covering Cisco technologies. And yet there are a large number of companies and people that choose to use other options. They write about Juniper or install Brocade. They spend time researching Cumulus Linux or Big Switch Networks.
Knowing a little about Continue reading
Meraki Will Never Be A Large Enterprise Solution
Thanks to a couple of recent conversations, I thought it was time to stir the wireless pot a little. First was my retweet of an excellent DNS workaround post from Justin Cohen (@CanTechIt). One of the responses I got from wireless luminary Andrew von Nagy (@RevolutionWifi):
This echoed some of the comments that I heard from Sam Clements (@Samuel_Clements) and Blake Krone (@BlakeKrone) during this video from Cisco Live Milan in January:
During that video, you can hear Sam and Blake asking for a few features that aren’t really supported on Meraki just yet. And it all comes down to a simple issue.
Should It Just Work?
Meraki has had a very simple guiding philosophy since the very beginning. Things should be easy to configure and work without hassle for their customers. It’s something we see over and over again in technology. From Apple to Microsoft, the focus has shifted away from complexity and toward simplicity. Gone are the field of radio buttons Continue reading
Cisco and OpenDNS – The Name Of The Game?
This morning, Cisco announced their intent to acquire OpenDNS, a security-as-a-service (SaaS) provider based around the idea of using Domain Naming Service (DNS) as a method for preventing the spread of malware and other exploits. I’ve used the OpenDNS free offering in the past as a way to offer basic web filtering to schools without funds as well as using OpenDNS at home for speedy name resolution when my local name servers have failed me miserably.
This acquistion is curious to me. It seems to be a line of business that is totally alien to Cisco at this time. There are a couple of interesting opportunities that have arisen from the discussions around it though.
Internet of Things With Names
The first and most obivious synergy with Cisco and OpenDNS is around Internet of Things (IoT) or Internent of Everything (IoE) as Cisco has branded their offering. IoT/IoE has gotten a huge amount of attention from Cisco in the past 18 months as more and more devices come online from thermostats to appliances to light sockets. The number of formerly dumb devices that now have wireless radios and computers to send information is staggering.
All of those devices depend Continue reading
The IPv6 Revolution Will Not Be Broadcast
There are days when IPv6 proponents have to feel like Chicken Little. Ever since the final allocation of the last /8s to the RIRs over four years ago, we’ve been saying that the switch to IPv6 needs to happen soon before we run out of IPv4 addresses to allocate to end users.
As of yesterday, ARIN (@TeamARIN) has 0.07 /8s left to allocate to end users. What does that mean? Realistically, according to this ARIN page that means there are 3 /21s left in the pool. There are around 450 /24s. The availability of those addresses is even in doubt, as there are quite a few requests in the pipeline. I’m sure ARIN is now more worried that they have recieved a request that they can’t fulfill and it’s already in their queue.
The sky has indeed fallen for IPv4 addresses. I’m not going to sit here and wax alarmist. My stance on IPv6 and the need to transition is well known. What I find very interesting is that the transition is not only well underway, but it may have found the driver needed to see it through to the end.
Mobility For The Masses
I’ve Continue reading
Thoughts on Cisco Live 2015
We’ve secretly replaced Tom with Mike Rowe. Let’s see if anyone notices…
Cisco Live 2015 is in the books. A great return to San Diego. A farewell from John Chambers. A greeting from Chuck Robbins (@ChuckRobbins). And a few other things.
The Community is Strong, But Concerned
The absolute best part of Cisco Live is the community that has grown from the social media attendees. More than once I heard during the week “I can’t believe this used to be 20-30 people!”. The social community continues to grow and change. Some people move on. Others return from absence. Still others are coming for the first time.
The Cisco Live social community is as inclusive as any I have seen. From the Sunday night Tweetup to the various interactions throughout the week, I’m proud to be a part of a community that strives to make everyone feel like they are part of a greater whole. I met so many new people this year and marveled at the way the Social Media Hub and Meetup Area were both packed at all hours of the day.
That being said, the community does have some concerns. Some of them are around Continue reading
There’s No Such Thing As Free Wireless
If you’ve watched any of the recent Wireless Field Day presentations, you know that free wireless is a big hot button issue. The delegates believe that wireless is something akin to a public utility that should be available without reservation. But can it every really be free?
No Free Lunches
Let’s take a look at other “free” offerings you get in restaurants. If you eat at popular Mexican restaurants, you often get free tortilla chips and salsa, often called a “setup”. A large number of bars will have bowls of salty snacks waiting for patrons to enjoy between beers or other drinks. These appetizers are free so wireless should be free as well, right?
The funny thing about those “free” appetizers is that they aren’t really free. They serve as a means to an end. The salty snacks on the bar are there to make you thirsty and cause you to order more drinks to quench that thirst. The cost of offering those snacks is balanced by the amount of extra alcohol you consume. The “free” chips and salsa at the restaurant serve as much to control food costs as they do to whet your appetite. By offering cheap food Continue reading
Can Community Be Institutionalized?
As technology grows at a faster pace, companies are relying more and more on their users to help spread the word about what they are doing. Why pay exorbitant amounts for marketing when there is a group of folks that will do it for little to nothing? These communities of users develop around any product or company with significant traction in the market. But can they be organized, built, and managed in a traditional manner?
Little Pink Houses
Communities develop when users start talking to each other. They exist in numerous different forms. Whether it be forum posters or sanctioned user groups or even unofficial meetups, people want to get together to talk about things. These communities are built from the idea that knowledge should be shared. Anecdotes, guides, and cautionary tales abound when you put enough people into a room and get them talking about a product.
That’s not to say that all communities can be positive ones. Some communities are even built around the idea of a negative reaction. Look at these groups that formed around simple ideas like getting their old Facebook page back or getting their old MySpace layout returned to them. Imagine the reaction that Continue reading
Just. Write.
Somewhere, someone is thinking about writing. They are confused where to start. Maybe they think they can’t write well at all? Perhaps they even think they’ll run out of things to say? Guess what?
Just. Write.
Why A Blog?
Social media has taken over as the primary form of communication for a great majority of the population. Status updates, wall posts, and picture montages are the way we tell everyone what we’re up to. But this kind of communication is fast and ephemeral. Can you recall tweets you made seven months ago? Unless you can remember a keyword, Twitter and Google do a horrible job of searching for anything past a few days old.
Blogs represent something different. They are the long form record of what we know. They expand beyond a status or point-in-time posting. Blogs can exist for months or years past their original post date. They can be indexed and shared and amplifed. Blogs are how we leave our mark on the world.
I’ve been fielding questions recently from a lot of people about how to get started in blogging. I’m a firm believer that everyone has at least one good blog post in them. One story Continue reading
Open Choices In Networking
I had an interesting time at the spring meeting of the Open Networking User Group (@ONUG_) this past week. There were lots of discussions about networking, DevOps, and other assorted topics. One that caught me by surprise was some of the talk around openness. These tweets from Lisa Caywood (@RealLisaC) were especially telling:
After some discussion with other attendees, I think I’ve figured it out. People don’t want an open network. They want choice.
Flexible? Or Predictable?
Traditional networking marries software and hardware together. You want a Cisco switch? It runs IOS or NX-OS. Running Juniper? You can have any flavor of OS you want…as long as it’s Junos. That has been the accepted order of things for decades. Flexibility is traded for predictability. Traditional networking vendors give you many of the tools you need. If you need something different, you have to find the right mix of platform and software to Continue reading
The Light On The Fiber Mountain
Fabric switching systems have been a popular solution for many companies in the past few years. Juniper has QFabric and Brocade has VCS. For those not invested in fabrics, the trend has been to collapse the traditional three tier network model down into a spine-leaf architecture to optimize east-west traffic flows. One must wonder how much more optimized that solution can be. As it turns out, there is a bit more that can be coaxed out of it.
Shine A Light On Me
During Interop, I had a chance to speak with the folks over at Fiber Mountain (@FiberMountain) about what they’ve been up to in their solution space. I had heard about their revolutionary SDN offering for fiber. At first, I was a bit doubtful. SDN gets thrown around a lot on new technology as a way to sell it to people that buy buzzwords. I wondered how a fiber networking solution could even take advantage of software.
My chat with M. H. Raza started out with a prop. He showed me one of the new Multifiber Push On (MPO) connectors that represent the new wave of high-density fiber. Each cable, which is roughly the size and Continue reading
Could IPv6 Drown My Wireless Network?
By now, the transition to adopt IPv6 networks is in full swing. Registrars are running out of prefixes and new users overseas are getting v6-only allocations for new circuits. Mobile providers are going v6-only and transition mechanisms are in place to ease the migration. You can hear about some of these topics in this recent roundtable recorded at Interop last week:
One of the converstaions that I had with Ed Horley (@EHorley) during Interop opened my eyes to another problem that we will soon be facing with IPv6 and legacy technology. Only this time, it’s not because of a numbering scheme. It’s because of old hardware.
Rate Limited
Technology always marches on. Things that seemed magical to us just five years ago are now antiquated and slow. That’s the problem with the original 802.11 specification. It supported wireless data rates at a paltry 1 Mbps and 2 Mbps. When 802.11b was released, it raised the rates to 5.5 Mbps and 11 Mbps. Those faster data rates, combined with a larger coverage area, helped 802.11b become commercially successful.
Now, we have 802.11n with data rates in the hundreds of Mbps. We also have 802. Continue reading