Interesting behaviour confirmed by @mikrotik.social support. If RouterOS’ DNS client gets an A record and a AAAA record in response to a query, it will use the A record and never fall back to the AAAA record regardless of IPv4 reachability. Methinks that’s a bug.

In network architecture, we desperately try to avoid shared fate when building resilient designs. The application architectures that rely exclusively Cloudflare or (a couple of weeks ago) AWS US East don’t appear to have made the same efforts. #NetEng #SharedFate #Down #Outage

I just saw someone post with the tagline “CHOAM Shareholder (Non-Voting)” and it made me smile. #Dune

“Prompt engineering” is the latest iteration of “being really good at Googling” but without the ability to easily evaluate the credibility of the source material. #AI

There’s always another 🕳️ to go down. Now it’s a packet-level analysis of raw L2TPv3 pseudowires vs UDP encapsulated ones to find out •why• the raw ones come in with a lower automatic MTU than the UDP ones do. On the surface, this makes no sense. #NetEng #Labbing #L2TP #MTU #TunnelsAllTheWayDown

Companies hiring for junior positions that need years of experience should raise an eyebrow. Organizations that aren’t hiring for junior positions at all should raise both.

Companies have been making excuses about developing their people for years with that tired “But what if we train them and they leave?” mantra. At the very same time, they’re only looking to hire folks with existing experience from organizations that •did• develop their people. There’s a disconnect.

Proof of concept lab complete (RFC 1925 Truth 1 has been satisfied) and my MikroTik Professionals’ Conference presentation request has been submitted. Now to start working on the actual presentation in case they actually say yes. #MTPC #MikroTik #NetEng

Them: What social media platforms are you on so I can follow you? Me: Mostly Rebo and Zooty Them: ? #B5

The problem with labbing cool networking ideas? Rabbit holes. Every step along the way, there’s another “Oh! Wouldn’t it be better if I integrated •this• idea?” Taking the red pill leads to a fun day of network geekery, but doesn’t get me any closer to the original goal. 1/2

I’m surprised I don’t misplace my military driver’s license (DND 404) constantly. #GeekJoke

Discovering that something is a DNS problem rather than a network problem feels good… until we learn to accept the fact that DNS is a fundamental network service. If it’s DNS, it’s the network. The real joy comes from it not being •my• network’s DNS that’s at fault. #NetEng #DNS

After two weeks of banging my head against this multicast routing lab, I finally found the problem. The default TTL for •all• multicast packets on Linux is 1. Of course, I overlooked the simple stuff in my troubleshooting, as one does. #NetEng #Multicast #Troubleshooting #LessonLearned #ThereAreDays

I haven’t played extensively with multicast routing for a little over a decade, but here I am grinding the rust off of the metal. Gotta stay fresh if I want to engage in silly proof-of-concept labs. #NetEng #Milticast #Labbing #WorthIt

“Something went wrong. Please try again later.” as an error message is about as helpful as “It’s broken.” is. Not only is the first part so vague that it’s useless to anyone who might be able to help, but we •know• that trying again later is unlikely to work either. #Grr

Apparently it’s one of •those• days again. #CorgiLife

An IPv6 address is composed of 8 16-bit quybbles (quad-nybbles) and this shall be the standard term used in all of my documentation going forward. #NetEng #Quybble #BecauseItMakesMeSmile #IHaveSpoken

“The standard that you walk past is the standard that you accept.” - LGen David Morrison. Simple phrase, but infinitely powerful. #Leadership #ThingsToLearn

Today I learned that my approach to leadership is actually an established method. Need to read some of Robert K. Greenleaf’s stuff sooner than later. #Leadership

Favourite use of ANI so far? Auto-generated transcripts for videos and podcasts. #NoTime #LetMeSkimThat #MyPace #AI

Some days I wonder if the companies that are so keen on using ANI to streamline their processes and eliminate jobs are considering that their customers are simultaneously using ANI to kill the need for their products and services. #AI

#NetEng #AI #Forums

To those who keep asking, no. I’m not worried about ANI taking my job. Well, no more so than I am about my screwdrivers taking my job. The practitioner is always more than the sum of their tools. #AI

If (approximately) one in four people are employed by ultra-large businesses, do networking practitioners have a similar distribution? My experience in discussions with my peers indicates that we’re skewed heavily toward that market, perhaps four in five or even nine in ten. #NetEng

why does enterprise software UI absolutely suck? you get engineers with a sense of superiority because they “got gud“ bro, you have stockholm syndrome from an aruba controller, and you’re telling me to git gud? get outta here.

#SME #Enterprise

The products of #AI aren’t subject to copyright. Does this mean organizations who are vibe coding have no intellectual rights to the results? I’m thinking the answer is yes. If I’m right, I now wonder if these organizations have considered this… or have they been too caught up in the hype?

If we outsource our customer service, it can be fairly said that we’re not serving our customers at all. Now let that sink in.

New madness: DNS Bypass Mitigation on RouterOS #NetEng #InfoSec #RouterOS #MikroTik ghostinthenet.info/preventing-d...

I came across the phrase "all hat and no cattle" today. I haven't heard that one in •years• and now need to re-add it to my lexicon.

#Cisco #IOS #NetEng

A first principle in network security is to minimize or eliminate the attack surface. I refer to this as the Miyagi Rule, quoting the iconic sensei from “The Karate Kid” in the 1980s: “Best way to avoid punch... no be there!” #InfoSec #NetEng

What?! AI for the sake of AI isn't a thing anymore? There needs to be a business case? Say it ain't so! 😉 cPacket seems to get it here. #NFD38

Networking Field Day 38 resumes in a little under 15 minutes with cPacket. Tune in here! #NFD38

I'm sure it's obvious to most that my customers are •not• in the top 1% of the market., but they •do• have more interesting requirements than the average medium enterprise. This is why I'm as interested in how products scale down as I am in how they scale up. #NFD38

Very cool that the high-speed smartnics that Hedgehog talks about aren't required. This opens up the lower-end market somewhat. #NFD38

Hedgehog's tie to Kubernetes potentially allows a cloud-as-abstraction approach to an organization's networks. It's a lot to wrap one's head around, but it has potential. #NFD38

Looking at Hedgehog's take on SONiC networking with this session. Tune in! #NFD38 www.linkedin.com/video/live/u...

They're letting us have opinions?! Oh... wait. That's why they asked us to participate, isn't it? #NFD38 Tune into the Networking Field Day 38 Delegate Round Table at buff.ly/suOpsyM and buff.ly/tEM0qVM.

So far, Network Copilot looks like an good tool for making sense of networks where documentation can't be counted on... or doesn't exist. I know it might come as a shock, but there are many more of those than we think there are. #NFD38 #NetworkCopilot

The LLM for Aviz' Network Copilot is self-hosted and only needs a single GPU! In these days where everything is moving to cloud-only, this is refreshing! #NFD38 #NetworkCopilot

For those who don't know, I'm a remote delegate for Networking Field Day 38 for the next two days. I •really• recommend tuning in, but if it's not you're thing, it's best to just ignore anything I'm putting out with the #NFD38 hashtag.

Aviz' Network Copilot seems like the perfect name for an AI-driven model for SONiC. Microsoft365 and SONiC both came out of Microsoft and we all see where they're going with Copilot. I •do• like that they're ensuring that a human is kept the loop. #NFD38 #SONiC #Copilot

Networking Field Day 38 begins with Aviz Networks. They're bringing some cool AI/SONiC stuff to the table. Tune in and see! #NFD38 www.linkedin.com/video/live/u...

What's the thinking here? I get 300 characters for a Bluesky post, but I get 2,000 for alt text on an image in the same post? Seems a bit unbalanced. #Bluesky #Alt

NEW: Enterprises Shouldn't Be Outsourcing Their IT Anymore 🎧🎙️ Watch ➡️ buff.ly/aFsxzaB Enterprise networks are complex, & fully outsourcing ops doesn’t always guarantee better results. @NetworkingNerd.net @ChrisGrundemann.com @GhostintheNet.bsky.social @AvalonHawk.bsky.social #TFDPodcast #NFD38

Sitting in the middle of a Provincial Park and contemplating Networking Field Day 38 tomorrow. There are two presenters that I need to do a bit more research on. Once that's done, I need to put on my serious glasses and activate the Starlink. Almost ready... #NFD38

Charles has figured out that we only shush him when he barks in the house and that barking in the yard is acceptable. Now he's manipulating us (okay, me) into letting him out any time he hears a noise outside so that he can go bark at it with impunity. #CorgiLife

The more experience I have with networking vendors, the more I become convinced that their prevailing definition of “enterprise” only includes the top 1% to 2% of the enterprise market. #NetEng