July 10, 2020

The Networking Nerd

Fast Friday Random Thoughts

It’s Friday and we’re technically halfway into the year now. Which means things should be going smoother soon, right? Here’s hoping, at least.

  • I posted a new episode of Tomversations yesterday. This one is about end-to-end encryption. Here’s hoping the Department of Justice doesn’t find a way to screw this up. And here’s hoping the Senate stops helping.
  • I saw a post that posits VMware may be looking to buy BitGlass. I know VMware’s NSX team pretty well. I also talked to the BitGlass team at RSA this year. I think this is something that VMware needs to pick up to be honest. They need to round out their SASE portfolio with a CASB. BitGlass is the best one out there to make that happen. I think we’re going to see a move here before we know it.
  • There are a lot of other acquisitions going on in the market. VMware bought Datrium. Uber bought Postmates. It’s typical to see these kinds of acquisitions during downturns because it becomes way cheaper to snap up your competition. I expect Q3 is going to be full of consolidation in the networking space. Cisco won’t start doing anything until August at the earliest, but once their numbers are finalized I’m sure we’re going to see them snap up a hot startup or two.

Tom’s Take

Here’s hoping the next six months are a little less crazy. I doubt that will be the case, but we’ll see!

by networkingnerd at July 10, 2020 04:25 PM

XKCD Comics

July 09, 2020

Packet Pushers

Why Your On-Switch Packet Capture Doesn’t Work Or Is Not Correct

Capturing packets on a switch is bad idea. But why ? Because unpredictable performance is normal.

The post Why Your On-Switch Packet Capture Doesn’t Work Or Is Not Correct appeared first on Packet Pushers.

by Greg Ferro at July 09, 2020 03:54 PM

My Etherealmind

July 08, 2020

Packet Pushers

Day Two Cloud: How Long Should I Store Security Logs? – Video

Tanya Janca of She Hacks Purple (blue AND red teams, see what she did there?) talks with Day Two Cloud podcast hosts Ned Bellavance and Ethan Banks about how long security logs should be stored. Why not forever? Because storage ain’t free, folks. You gotta make some choices. To hear the rest of our chat […]

The post Day Two Cloud: How Long Should I Store Security Logs? – Video appeared first on Packet Pushers.

by The Video Delivery at July 08, 2020 06:45 PM

Take The Packet Pushers’ 2020 Audience Survey

Please take the Packet Pushers' 2020 Audience Survey. Your feedback helps us figure out where to put our efforts in the coming year.

The post Take The Packet Pushers’ 2020 Audience Survey appeared first on Packet Pushers.

by Drew Conry-Murray at July 08, 2020 06:42 PM

ipSpace.net Blog (Ivan Pepelnjak)

Worth Reading: Lies, Damned Lies, and Keynotes

Got sick and tired of conference keynotes? You might love the Lies, Damned Lies, and Keynotes rant by Corey Quinn. Here are just two snippets:

They’re selling a fantasy, and you’ve been buying it all along.

We’re lying to ourselves. But it feels better than the unvarnished truth.


July 08, 2020 06:04 AM

XKCD Comics

July 07, 2020

My Etherealmind
Packet Pushers

Day Two Cloud: How Do I Start Securing A Cloud Application? – Video

Tanya “She Hacks Purple” Janca talks about how to tackle the sticky problem of securing a cloud application. Do you tackle it from the top down–the app layer first? Or go from the bottom up–the infrastructure layer first? Tanya points out many things to consider, including that a lot of shops have a single key […]

The post Day Two Cloud: How Do I Start Securing A Cloud Application? – Video appeared first on Packet Pushers.

by The Video Delivery at July 07, 2020 09:00 AM

July 06, 2020

The Networking Nerd

Podcasts I’m Playing in 2020

Since I seem to have a lot more time on my hands without travel thanks to current…things, I’ve been consuming podcasts more and more during my morning workouts. I’ve got a decent list going now and I wanted to share it with you. Here are my favorite podcasts (not including the one that I do for Gestalt IT, the On-Premise IT Roundtable:

  • Packet Pushers – The oldest and best is still my go-to for listening. I started back at Episode 3 or 4. i can remember the intro music. And I’ve been a guest and a participant more times than I can count. Greg, Ethan, and Drew do an amazing job of collecting all the info about the networking world and pushing it to my ears daily. When you through in their news feed (Network Break), cloud (Day Two Cloud), DevOps (Full Stack Journey), IPv6 (IPv6 Buzz), and one-off stuff (Briefings in Brief) there’s a lot to consume aside from their Heavy Networking “main” feed. You can sub to any or all of these if you want. And stay tuned because you might hear me from time to time.
  • Network Collective – Jordan is one of my old and dear friends. And I’ve been a fan of his work since he started it back in the day. Network Collective has gone through a lot of changes over the years, from flirting with video to changes in the host lineup. But one thing has remained the same. Network Collective captures the spirit and camaraderie of the old Community shows that so many podcasts have gotten away from over the years. When the focus moves to making the podcast into a business or on other topic areas, often the community aspect is the first thing to go. Jordan and Tony do a great job today of keeping the focus on the community.
  • Risky Business – This is my favorite security news podcast. It’s slick. Professional. And Patrick does a great job of blending news and interviews with sponsored segments. Risky Business also helps me keep a more global perspective on the world of security. It’s often far too easy to become insular and forget that not everyone lives in the US or faces the same challenges we do. The release cadence of episodes ensures that I always have something Risky to listen to on my walks.
  • Darknet Diaries – If Risky Business is the nightly news, Darknet Diaries is the drama that comes on right before. Each episode has a compelling hook to get you listening and then keep you there while the story unfolds. I’ve been known on a few occasions to do an extra lap around the block so I didn’t miss a juicy tidbit in the story. Jack Rhysider has that kind of voice that makes you feel like he’s just about to drop the biggest twist of the century with every statement. You should listen if you like long-form content.
  • The Contention Window – Gotta have a wireless podcast, right? Scott Lester and Tauni Odia are good friends from the wireless side of the house that break down the latest news and updates and have fun. Seriously. I don’t think there’s been an episode that I haven’t chuckled at yet. Their recording schedule has been a bit sparse this year with job changes and COVID craziness, but make sure you subscribe so you’ll be updated the next time Scott finishes editing something.
  • Current Status – Current Status is a podcast from my friends Teresa Miller and Phoummala Schmitt. I was honored to be Guest #1 back in the day. They’ve tackled some pretty heady subjects over the years. For a while it looked as thought real life had claimed another podcast and left it fallow, but the tenacity of these two ladies can’t be denied. Current Status has been resurrected and is broadcasting live on Youtube every Thursday night. Make sure you grab a drink and join in the fun! You can also subscribe to their feed to pull down the episodes after the fact.
  • Nerd Herd Podcast – Not every podcast in my feed is about tech. Sometimes it’s just tech-y friends being nerdy. The Nerd Herd Podcast is all about the nerdy stuff that goes on around us. Rocket launches, app security issues, and even the occasional sing along are a great way to unwind and not think about work for a while. Plus, check out Episode 26 to watch cast favorite Amy Lewis sing her heart out!

Tom’s Take

Consuming these podcasts during my morning walk or run helps me focus on keeping my head in the game as well as keeping up with what’s going on. Plus, I don’t typically trip and fall like I would if I’m reading my phone. Unless Tauni is making fun of Scott again. If you’ve got a favorite podcast (tech or otherwise) that I should check out, leave a comment below. And yes, it’s totally okay if you’re the host! You never know when someone is going to find your hard work and enjoy it!

by networkingnerd at July 06, 2020 04:06 PM

Packet Pushers

Day Two Cloud: Is DevSecOps Really A Thing? – Video

Tanya Janca (She Hacks Purple) gives her take on whether DevSecOps is just a mumbling marketing nonsense word, or an actual thing. To hear the rest of this discussion, listen to Day Two Cloud podcast episode 55. You can subscribe to the Packet Pushers’ YouTube channel for more videos as they are published. It’s a […]

The post Day Two Cloud: Is DevSecOps Really A Thing? – Video appeared first on Packet Pushers.

by The Video Delivery at July 06, 2020 03:52 PM

XKCD Comics

July 03, 2020

XKCD Comics

July 01, 2020

My Etherealmind

Wave Glider Robots

This video opened my mind to the ideas of robotic surveillance and data capture of the ocean. Wide range of civilian applications of course. But also police applications for customs and policing for monitoring the seaways around a country. And the military applications for defense and detection. Potentially even delivering a torpedo style payload.

The post Wave Glider Robots appeared first on EtherealMind.

by Greg Ferro at July 01, 2020 01:07 PM

XKCD Comics

June 30, 2020

Packet Pushers

Packet Exchange S1E3: News, No Headcount For You, Scrapli Demo – Video

Welcome to this, the thirdliest edition of Packet Exchange. Thirdliest is not a word, only NOW IT IS. Rapid fire news for networking & cloud folks, AMA, and then something educational. Your host is Ethan Banks. NEWS On today’s Packet Exchange we cover news about Anuta Networks, LiveAction!, flexiWAN, Interop Digital, and the Universal Fiber […]

The post Packet Exchange S1E3: News, No Headcount For You, Scrapli Demo – Video appeared first on Packet Pushers.

by The Video Delivery at June 30, 2020 07:06 PM

I’m Concerned For The Future Of An Open Internet

The influence of governments over standards bodies inside and outside the United States may jeopardize the open protocols that drive the Internet.

The post I’m Concerned For The Future Of An Open Internet appeared first on Packet Pushers.

by Greg Ferro at June 30, 2020 09:00 AM

June 29, 2020

Packet Pushers

Should I Rent From AWS Or Build It Myself? – Day Two Cloud Video

Cloud design expert Bobby Allen (@ballen_clt) gives his opinion on whether companies should be renting infrastructure from AWS or building it themselves. In fairness to Bobby, that wasn’t a fair question for Day Two Cloud podcast hosts Ethan Banks and Ned Bellavance to ask. Not that Bobby took the bait–he gave an insightful, nuanced answer. […]

The post Should I Rent From AWS Or Build It Myself? – Day Two Cloud Video appeared first on Packet Pushers.

by The Video Delivery at June 29, 2020 07:25 PM

The Packet Exchange S1E2: News, CiscoLive, Working With Greg, OSPF vs. EIGRP Is Silly

Welcome to The Packet Exchange. Rapid fire news for networking & cloud folks, AMA, and then something educational. Your host is Ethan Banks. For more technical content helping IT engineers develop their careers in networking and cloud, visit https://PacketPushers.net. You’ll find podcasts and blogs, plus our newsletter and Slack channel. NEWS NetYCE compliance. ONAP Frankfurt. […]

The post The Packet Exchange S1E2: News, CiscoLive, Working With Greg, OSPF vs. EIGRP Is Silly appeared first on Packet Pushers.

by The Video Delivery at June 29, 2020 07:22 PM

XKCD Comics

June 26, 2020

ipSpace.net Blog (Ivan Pepelnjak)

Summer Break 2020

Almost 30 webinars, an online course, and over 140 blog posts later it’s time for another summer break.

While we’ll do our best to reply to support and sales requests (it might take us a bit longer than usual), don’t expect anything deeply technical for the next two months… but of course you can still watch over 280 hours of existing content, listen to over 100 podcast episodes, or read over 3500 blog posts.

We’ll be back with tons of new content in early September.

In the meantime, automate everything, get away from work, turn off the Internet, and enjoy a few days in your favorite spot with your loved ones!

June 26, 2020 06:08 AM

XKCD Comics

June 25, 2020

The Networking Nerd

Data Is The New Solar Energy

You’ve probably been hearing a lot about analytics and artificial intelligence in the past couple of years. Every software platform under the sun is looking to increase their visibility into the way that networks and systems behave. They can then take that data and plug it into a model and make recommendations about the way things need to be configured or designed.

Using analytics to aid troubleshooting is nothing new. We used to be able to tell when hard disks were about to go bad because of SMART reporting. Today we can use predictive analysis to determine when the disk has passed the point of no return and should be replaced well ahead of the actual failure. We can even plug that data into an AI algorithm to determine which drives on which devices need to be examined first based on a chart of performance data.

The power of this kind of data-driven network and systems operation does help our beleaguered IT departments feel as though they have a handle on things. And the power that data can offer to us has it being tracked like a precious natural resource. More than a few times I’ve heard data referred to as “the new oil”. I’d like to turn that on its head though. Data isn’t oil. It’s solar energy.

As Sure As The Sun Comes Up

Oil is created over millions of years. It’s a natural process of layering organic materials with pressure and time to create a new output. Sounds an awful lot like data, right? We create data through the interactions we have with systems. Now, let me ask you the standard Zen kōan, “If a tree falls in the forest and no one is there to hear it, does it make a sound?” More appropriate for this conversation, “If two systems exist without user interaction, do they create data?”

The fact is in today’s technology-driven world that systems are creating data whether we want them to or not. There is output no matter what happens with our interactions. That makes the data ever-present. Like our glorious stellar neighbor. The sun is going to shine no matter what we do. Our planet is going to be bathed in energy no matter if we log on to our email client today or decide to go fishing. Data is going to be generated. What we choose to do with that data determines how we can utilize it.

In order to use oil, it must be processed and refined. It also must be found, drilled out of the ground, and transported to stations where it can be converted to different products. That’s a fairly common way to look at the process of turning data into the more valuable information product we need to make decisions. But in the world of ever-present data do we really need to go looking for it? Honestly, all you need to do is look around and you’ll see it! Kind of like going outside and looking up to find the sun shining down on us.

Let’s get to the processing part. Both forms of energy must be harnessed and concentrated to be useful. Oil requires refineries. Solar power requires the use of plants to consolidate and refine the collected energy from solar panels that generate electricity or heat energy that is converted into steam-powered electricity. In both cases there is infrastructure needed to convert the rew data to information. The key is how we do it.

Our existing infrastructure is based on the petroleum economy of refinement. Our standard consumers of oil are things like cars and trucks and other oil-powered fuel consumers. But the world is changing. Electrically powered vehicles and other devices don’t need the stopgap of oil or petroleum to consume energy. They can get it directly from the electrical grid that can be fed by solar energy. As we’ve adapted our consumption models of energy, we have found better, cleaner, more efficient ways to feed it with less infrastructure. Kind of like how we’ve finally dumped clunky methods for data collection like SNMP or WMI in favor of things like telemetry and open standard models that give us more info in better fashion than traps or alerts. Even the way we handle syslog data today is leaps and bounds better than it used to be.

Lastly, the benefits to standardization on this kind of collection are legion. With solar, the sun isn’t going away for a few billion more years. It’s going to stick around and continue to cause amazing sunrises and give me sunburns for the rest of my days. We’re not going to use up the energy output of the sun even if we tried. Oil has a limited shelf life at best. If we triple the amount of oil we use for the next 30 years we are going to run out completely until more can be made over the next few million years. If we increase the amount of solar energy we use by 10x over the next hundred years we won’t even put a dent in the output of the sun that we received in a minute during that time.

Likewise, with data, moving away from the old methods of collection and reporting mean we can standardize on new systems that give us better capabilities and don’t require us to maintain old standards forever. Anyone that’s ever tried to add a new entry to an archaic old MIB database will know why we need to get more modern. And if that means cleaner data collection all around then so be it.

Tom’s Take

Generally, I despise the allusions to data being some other kind of resource. They’re designed to capture the attention of senior executives that can’t imagine anything that isn’t expensive or in a TV series like Dallas. Instead, we need to help everyone understand the merits of why these kinds of transitions and shifts matter. It’s also important to help executives understand that data needs time and effort to be effective. We can’t just pick up data and shove it into the computers to get results any more than we can shove raw crude oil into a car and expect it to run. Given today’s environmental climate though, I think we need to start relating data to newer, better forms of energy. Just sit back and enjoy the sunshine.

by networkingnerd at June 25, 2020 03:07 PM

ipSpace.net Blog (Ivan Pepelnjak)

BGP Navel Gazing on Software Gone Wild

This podcast introduction was written by Nick Buraglio, the host of today’s podcast.

As we all know, BGP runs the networked world. It is a protocol that has existed and operated in the vast expanse of the internet in one form or another since early 1990s, and despite the fact that it has been extended, enhanced, twisted, and warped into performing a myriad of tasks that one would never have imagined in the silver era of internetworking, it has remained largely unchanged in its operational core.

The world as we know it would never exist without BGP, and because of the fact that it is such a widely deployed protocol with such a solid track record of “just working”, the transition to a better security model surrounding it has been extraordinarily slow to modernize.

June 25, 2020 05:57 AM

June 24, 2020

ipSpace.net Blog (Ivan Pepelnjak)

Adapting Network Design to Support Automation

This blog post was initially sent to the subscribers of my SDN and Network Automation mailing list. Subscribe here.

Adam left a thoughtful comment addressing numerous interesting aspects of network design in the era of booming automation hype on my How Should Network Architects Deal with Network Automation blog post. He started with:

A question I keep tasking myself with addressing but never finding the best answer, is how appropriate is it to reform a network environment into a flattened design such as spine-and-leaf, if that reform is with the sole intent and purpose to enable automation?

A few basic facts first:

June 24, 2020 05:34 AM

XKCD Comics

June 23, 2020

Packet Pushers
ipSpace.net Blog (Ivan Pepelnjak)

Security Aspects of Using Smart NICs

After I published the blog post describing how infrastructure cloud provides (example: AWS) might use smart Network Interface Cards (NICs) as the sweet spot to implement overlay virtual networking, my friend Christoph Jaggi sent me links to two interesting presentations:

Both presentations describe how you can take over a smart NIC with a properly crafted packet, and even bypass CPU on a firewall using smart NICs.

June 23, 2020 07:18 AM

June 22, 2020

ipSpace.net Blog (Ivan Pepelnjak)

Worth Reading: Starting Your Network Automation Journey

Daniel Teycheney published an excellent blog post with numerous hints on starting your automation journey including:

  • Which programming language should you start with?
  • Python or Ansible?
  • What about Terraform?
  • What resources could you use?

June 22, 2020 06:41 AM

Potaroo blog

Measuring Route Origin Validation

How well are we doing with the adoption of Route Origin Validation in the Inter-Domain routing space? How many users can no longer reach a destination if the only available ROAs mark the destination announcement as invalid?

June 22, 2020 01:00 AM

XKCD Comics

June 20, 2020

ipSpace.net Blog (Ivan Pepelnjak)

Worth Reading: When Security Takes a Backseat to Productivity

Brian Krebs wrote an interesting analysis of CIA’s Wikileaks report. In a nutshell, they were a victim of “move fast to get the mission done” shadow IT.

It could have been worse. Someone with a credit card could have started deploying stuff in AWS ;))

Not that anyone would learn anything from the PR nightmare that followed.

June 20, 2020 07:53 AM

The Networking Nerd

The Conundrum of Virtual Conferences

Okay, the world is indeed crazy. We can’t hide from it or hope that it just blows over sooner or later. We’re dealing with it now and that means it’s impacting our work, our family lives, and even our sanity from time to time. One of the stalwart things that has been impacted by this is the summer conference schedule. We’ve had Aruba Atmosphere, Cisco Live, VMworld, and even Microsoft Ignite transition from being held in-person to a virtual format complete with shortened schedules and pre-recorded sessions. I’ve attended a couple of these so far for work and as an analyst, and I think I’ve figured it out.

If you come to a conference for content and sessions, you’ll love virtual events. If you come for any other reason, virtual isn’t going to work for you.

Let’s break this down because there’s a lot to unpack.

Information Ingestion

Conferences are first and foremost about disseminating information. Want to learn what new solutions and technologies have been launched? It’s probably going to be announced either right before or during the conference. Want to learn the ins-and-outs of this specific protocol? There’s probably a session on it or a chance to ask a professional engineer or architect about it. There’s a lot of content to be consumed at the conference. So much, in fact, that in recent years the sessions have started to be recorded and posted for consumption after the fact. You can now have access to a library of any topic you could ever want. Which comes in really handy when your boss decides in November that you’re going to be the new phone person…

Because all this content has been recorded and published before, transitioning the content to a virtual format is almost seamless. The only wrinkle is that people are going be recording from their home instead of a blast freezer ballroom in the Mandalay Bay. That means you’re going to need tighter control over things like environment and video recordings. Your people are going to have to get good and talking and setting up their screens to be effective. Most good presenters can do this already. Some need some coaching. Most are going to need a few takes to get it right since they aren’t going to be editing together their own video. But the end result is going to be the same. You’re going to have great content to share with people to be consumed over the course of days or weeks or even months.

Keynotes are a little bit harder to quantify in this content category. They are definitely content, just not for tech people. Keynotes are analyst and press fodder. It’s a packaging of the essence of the event in an hour-long (or longer) format designed to hit the important points for tweets and headlines. Keynotes are very, very, very rehearsed. No one tends to go off the script unless it’s absolutely necessary. Even the off-the-cuff remarks are usually scripted and tested for impact ahead of time. If a joke fails to land, just imagine the three others they tried that were worse.

But keynotes at a virtual event can be more impactful. Because you can do some editing you can put together different takes. You can inject some emotion. You can even use it as a platform for creating change. I specifically want to call out the Cisco Live keynote from Chuck Robbins this year. It wasn’t about tech. We didn’t really hear about protocols or hardware. Instead, Chuck used his platform to talk about the drivers of technology. He stood up and told the world how we need to use our talents and our toys to build a better world for ourselves and for everyone around us. Chuck didn’t mince words. He postponed Cisco Live by two weeks to highlight the struggles and causes that are being shown nightly on the news. He wanted us to see the world he and his company are trying to help and build up. And he used the keynote slot to push that message. No flashy numbers or sparkly hardware. Just good, old fashioned discussion.

Virtual Hallways

Every positive thing should have something corresponding to balance it out. And for virtual conferences, it’s the stuff that’s not about content. Ironically enough, that’s the part that I’ve been so steeped in recently. Sure, Tech Field Day produces a lot on content around these events. I’m happy to be able to be a part of that. But the event is more than just videos and slide decks. It’s more than just sitting in uncomfortable chairs in a meat locker nursing a hangover trying to understand the chipset in a switch.

Conferences are as much about community as anything else. They’re about seeing your friends in-person. Conferences are about hallway conversations about random topics and taking a taxi to a bar halfway down the Vegas Strip to meet up with a couple of people and some person you’ve never even heard of. It’s about meeting the co-workers of your friends and pulling them into your circle. It’s about sharing hobbies and life stories and learning about the crazy haircut someone’s kid gave themselves right before they left.

Community matters to me most of all. Because a conference without a community is just a meeting. And that part is missing virtually. I did my best with an attempt to do Tom’s Virtual Corner with our community. I was shocked and pleased at the number of people that joined in. We had over 50 people on the calendar invite and over a dozen connected at any one time. It was wonderful! But it wasn’t the corner that we know and love. It’s not that it wasn’t special. It was totally special and I appreciate everyone that took time out of their day to take part. But there are some things that are missing from the virtual experience.

I’ll take myself for example. I have two problems that I have to overcome at events:

  1. I’m a story teller.
  2. Other people need to talk too.

If I get on a tear with number one, number two won’t happen. At an in-person event it’s easy enough for me to deal with the first one. I just pull interested people aside for a small group conversation. Or I wait for a different time or another day to tell my story. It’s easy enough to do when you spend sixteen hours around people on average and even more well into the night with friends.

However, those above things don’t really work on Zoom/Webex/GoToMeeting. Why? Well, for one thing you can only really have one speaker at a time. So everyone needs to keep it short and take turns. Which leads to a lot of waiting to talk and not so much for listening. Or it leads to clipped quips and not real discussion. And before you bring up the breakout room idea, remember that mechanically there is a lot of setup that needs to happen for those. You can’t just create one on the fly to tell a story about beanbags and then just hop back into the main room. And, breakout rooms by their very nature are exclusionary. So it’s tough to create one and not want to just stay there and let people come to you.

Tom’s Take

This is just a small part of the missing aspect of virtual conferences. Sure, your feet don’t hurt at the end of the day. I’d argue the food is way better at home. The lack of airports and hotel staff isn’t the end of the world. But if your primary focus for going to events is to do everything other than watching sessions then the virtual experience isn’t for you. The dates for Cisco Live 2021 and Aruba Atmosphere 2021 have already been announced. I, for one, can’t wait to get back to in-person conferences. Because I miss the fringe benefits of being in-person more than anything else.

by networkingnerd at June 20, 2020 12:24 AM

Potaroo blog

Measuring IPv6

This week I participated in a workshop on measurement of IPv6, organised by the US Naval Postgraduate School's Centre for Measurement and Analysis of Network Data (CMAND) and the folk at UC San Diego's Center for Applied Internet Data Analysis (CAIDA). Here's my notes from that workshop and a few opinions about IPv6 thrown is as well.

June 20, 2020 12:00 AM

June 19, 2020

ipSpace.net Blog (Ivan Pepelnjak)

Internet Behind Iron Curtain

A while ago Russ White invited me to be a guest on his fantastic History of Networking podcast, and we spent almost an hour talking about networking in 1980s and 1990s in what some people love to call “behind iron curtain” (we also fixed that misconception).

June 19, 2020 06:33 AM

XKCD Comics

June 18, 2020

My Etherealmind

Outburst: Presentation Tips for May 2020

After six weeks of virtual events, some ideas on content for your presentation because you are all getting it wrong.

The post Outburst: Presentation Tips for May 2020 appeared first on EtherealMind.

by Greg Ferro at June 18, 2020 01:22 PM

ipSpace.net Blog (Ivan Pepelnjak)

Bridging Loops in Disaster Recovery Designs

One of the readers commenting the ideas in my Disaster Recovery and Failure Domains blog post effectively said “In an active/passive DR scenario, having L3 DCI separation doesn’t protect you from STP loop/flood in your active DC, so why do you care?

He’s absolutely right - if you have a cold disaster recovery site, it doesn’t matter if it’s bombarded by a gazillion flooded packets per second… but how often do you have a cold recovery site?

June 18, 2020 07:01 AM

June 17, 2020

ipSpace.net Blog (Ivan Pepelnjak)

Worth Reading: Lessons Learned from 20 Years of Hype Cycles

Michael Mullany analyzed 20 years of Gartner hype cycles and got some (expected but still interesting) conclusions including:

  • Nobody noticed major technologies even when they were becoming mainstream
  • Lots of technologies just die, others make progress when nobody is looking
  • We might get the idea right and fail badly at implementation
  • It takes a lot longer to solve some problems than anyone expected

Enjoy the reading, and keep these lessons in mind the next time you’ll be sitting in a software-defined, intent-based or machine-learning $vendor presentation.

June 17, 2020 08:01 PM

My Etherealmind
Potaroo blog

Where is the DNS Headed?

I was on a panel at the recent Registration Operations Workshop on the topic of DNS Privacy and Encryption. The question I found myself asking was: "What has DNS privacy to do with registration operations?"

June 17, 2020 04:00 AM

XKCD Comics

June 16, 2020

Packet Pushers

The Packet Exchange S1E1: News, Work/Life Balance, EIGRP Stub Areas – Video

Welcome to the very first episode of The Packet Exchange. Rapid fire news for networking & cloud folks, AMA, and then something educational. Your host is Ethan Banks. For more technical content helping IT engineers develop their careers in networking and cloud, visit PacketPushers.net. You’ll find podcasts and blogs, plus our newsletter and Slack channel. […]

The post The Packet Exchange S1E1: News, Work/Life Balance, EIGRP Stub Areas – Video appeared first on Packet Pushers.

by The Video Delivery at June 16, 2020 09:25 PM

My Etherealmind

Automate Image Compression for Blogging

Adding images and screenshots to posts is good but size is a consideration

The post Automate Image Compression for Blogging appeared first on EtherealMind.

by Greg Ferro at June 16, 2020 11:07 AM

ipSpace.net Blog (Ivan Pepelnjak)

EVPN: The Great Unifying Theory of VPN Control Planes?

I claimed that “EVPN is the control plane for layer-2 and layer-3 VPNs” in the Using VXLAN and EVPN to Build Active-Active Data Centers interview a long long while ago and got this response from one of the readers:

To me, that doesn’t compute. For layer-3 VPNs I couldn’t care less about EVPN, they have their own control planes.

Apart from EVPN, there’s a single standardized scalable control plane for layer-3 VPNs: BGP VPNv4 address family using MPLS labels. Maybe EVPN could be a better solution (opinions differ, see EVPN Technical Deep Dive webinar for more details).

June 16, 2020 06:23 AM

June 15, 2020

Potaroo blog

Technology Adoption in the Internet

How are new technologies adopted in the Internet? What drives adoption? What impedes adoption? These were the questions posed at a panel session at the recent EuroDiG workshop in June.

June 15, 2020 10:30 AM

ipSpace.net Blog (Ivan Pepelnjak)

Network Reliability Engineering Should Be More than Software or Automation

This blog post was initially sent to the subscribers of my SDN and Network Automation mailing list. Subscribe here.

In late 2018 Juniper started aggressively promoting Network Reliability Engineering - the networking variant of concepts of software-driven operations derived from GIFEE SRE concept (because it must make perfect sense to mimic whatever Google is doing, right?).

There’s nothing wrong with promoting network automation, or infrastructure-as-code concepts, and Matt Oswalt and his team did an awesome job with NRE Labs (huge “Thank you!” to whoever is financing them), but is that really all NRE should be?

June 15, 2020 06:35 AM

XKCD Comics