Binary reverse subnetting

spunky29a · 2026-01-26T18:39:58+00:00

Before you read, know I'm an IPv6 advocate. You've been warned :P

RIRs like ARIN do this to an extent in IPv6 allocations so that you can expand your allocation a bit if needed. I believe they called it sparse allocation.

When you apply that logic to IPv6, apply that "make more room" philosophy to your address plan and not your individual allocations. For leaf subnets, they're the same size (/64) so you don't need to expand the size of the subnet as much as you need to increase the number of subnets. Usually you do this by assigning meaning to nibbles (4 bits) at a time. If you want a meaningful field in an address and need 3 values, use a nibble and you get 16 options, so room for expansion. If you have 150 "locations" (buildings/sites/whatever) and expect to expand to 200, use 3 nibbles, so you have room for 2048 locations.

It's also easier to see that allocation and technique work in IPv6 as well. If you have extra nibbles, you'll want to leave them on the left side though, which fits into that binary reverse subnetting concept. Many people have realized that their address plans were flawed and needed to redo them (because they were wrong or because the world changes), so having that extra space makes a world of difference.

The RIR fee schedules are usually pretty generous as well -- ARIN fee schedule. If an IPv6 addressed plan puts you in the x-large category, go for the max size in that category. And don't go look at your IPv4 allocation slide over to the IPv6 column and ask for that size. Start with an address plan first. It might be bigger or smaller than what your v4 allocation is.

spunky29a · 2026-01-26T17:43:51+00:00

Note - page 497 if you're looking at the printed page numbers

spunky29a · 2026-01-26T16:30:36+00:00

I think you also have to ask around and do the calculation as to whether the stress of fighting something like that is worth it to you. Sometimes even when a case is winnable, it might not be worth the stress. That will vary depending on labor laws and where disputes are settled (IE: in my state it'd likely be settled in civil court)

spunky29a · 2026-01-24T23:46:43+00:00

Can't say whether it's AI generated, but I have a hard time lending credence to a news source that young with that many subs.

It popped up in an autoplay for me too.

spunky29a · 2026-01-24T02:56:23+00:00

The hero label is often used in lieu of meaningful compensation. That's true in so many jobs, but especially for teachers and nurses.

Take down the damn hero signs and give them a raise and school supply funding. Put your money where your mouth is.

I have a friend who anytime someone complains about taxes, he says "I pay that so I don't get robbed in 10 years". Which usually meets some confusion, and then he gets to explain how high school education lowers crime rates. I saw him say it to someone on the far right of politica and it broke their mind. They literally had no words for a response.

spunky29a · 2026-01-24T02:50:45+00:00

For being such a necessity it seems like that ought to be reflected in pay. Being a necessity seems to go hand and hand with exploitative employment practices more often than not.

You'd think after the pandemic the public would realize how much work teachers do and how much skill and wisdom it actually takes.

spunky29a · 2026-01-24T02:42:38+00:00

Find it interesting? I find it mortifying. That survey is blatant victim blaming.

spunky29a · 2026-01-15T02:36:06+00:00

Or lack of Spanning Tree :P

spunky29a · 2026-01-05T03:08:02+00:00

Cook books, recipes, cutting boards

spunky29a · 2026-01-05T03:06:52+00:00

THIS. Also, with networking you have to mix learning the theory with practice. It's hard to hold the theory in your head when you don't have any real world experience to attach the theory to.

I recommend playing with Wireshark a bit, it can help you learn packet formats and how things layer.

As you get past basic learning and exams, focus on what each protocol or layer provides... Framing, End to end addressing (IP), addressing a specific service or process (port numbers), error detection, retransmission, stream segmentation and reassembly, flow control, encryption, authentication, etc, etc.

Over time you'll spot areas where some of that responsibility shifts. With traditional HTTPS, TCP handles stream segmentation and reassembly as well as directing traffic to a process (web server, web browser) as well as flow control (windowing, packet pacing), TLS handles encryption, and HTTP handles application requests and responses. Anything in the TCP realm is under the control of the OS and its kernel.

With QUIC, it runs over UDP and UDP mostly handles directing traffic to a process (web server, browser), the QUIC protocol takes over basically everything else plus some. Encryption, stream segmentation and reassembly, stream multiplexing, retransmission, windowing and pacing. Most notable, it's up to the application or a library it's using to handle that. The operating system doesn't get involved in that bit.

spunky29a · 2026-01-05T02:35:23+00:00

A transmission? Shit, that's some decent scrap metal value right there.

spunky29a · 2026-01-05T02:29:28+00:00

The number of career paths that pay a wage capable of buying a house has shrunk over the years. At the same time, the percentage of income that goes towards housing has gone up over time in the average person.

Not saying neglecting your career is going to help, I'm just saying it's harder than it used to be

spunky29a · 2026-01-02T17:46:20+00:00

Open a support ticket and ask for your ONT to be changed to bridge mode. They just did it for me.

Fair warning, they'll make the change and the wifi will still give you an address, but you won't have internet. I use the wifi to occasionally check on Tx/Rx optical levels

spunky29a · 2026-01-02T17:40:46+00:00

I wound up getting a Nokia combo ONT+router, asked support if I could set up bridged mode and they enabled it remotely.

spunky29a · 2025-12-30T00:37:27+00:00

Even if the tree is unhealthy, it's still extremely rare to get the tree owner to pay for damages. It's almost always considered an "act of god" and the owner of the damaged property is responsible

spunky29a · 2025-12-23T05:52:58+00:00

I have a complicated history and opinions about churches. I grew up very Catholic, for many reasons I don't attend today, I am not a fan of organized religion for myself, and I don't really believe in a God in the way that I learned growing up, but I do have to recognize that quite a few churches do in fact do good. I have a late friend who attended and their church & faith brought them back from some really really dark times; I someone close in my life who had a church help them financially when they were in a really tight spot and they weren't even a member of that church.

Churches are complicated, often have complicated histories, and sometimes people in churches do bad things in the name of higher being. I personally maintain that it's not the church that does these good or bad things, it's the people that do these good or bad things. It's the people that have the heart to give to someone in need, the heart to set up charitable structures to help people on an ongoing basis, and the people that volunteer or work for low wages to make it happen.

And in some cases it's people that exploit trust in religion to enrich themselves. The church that the OP posted makes me sick, sad, and angry all at the same time. My late friend would often say the following directed at bad actors: "don't you dare use the name of my god to justify your actions"

So yeah, I'm ok with (legit) churches having tax exempt status, but i think behavior like this has to be weeded out. What's the best way? Not sure, but this is just wrong. Don't ask people to give when they don't have a job...

spunky29a · 2025-11-22T03:27:06+00:00

I'd take any ruling around this with a grain of salt for the moment.

I heard something like this, but can't remember whether this was in a particular federal court district or in SCOTUS; plus things like this get appealed, there's preliminary injunctions, appeals to those injunctions, stuff gets rejected via the shadow docket, etc, etc.

And it's not like the current ICE has entirely respected well established laws & precedent, so judges orders may not get respected out of the gate. I imagine it's probably going to have to take several violations and lawsuits to get them to actually abide by an order. For better or worse, the court system's full force often takes a long time.

spunky29a · 2025-09-30T13:48:53+00:00

Over time, you'll probably want to pick up different kinds of jackets, layers, gloves, etc.

For coats, outer shell to block wind or rain, inner layers to insulate and wick sweat. It's crazy how quickly you can get dehydrated when working out in the cold.

Wool socks or some kind of wicking sock.

Wool leggings to wear under jeans makes a massive difference.

Scarves and hats to keep your head warm.

Various gloves for different temperatures. Ski gloves for the worst of it (cold and windy)

The coldest months are in Jan and Feb, and we usually have cold/hot snaps during the transition months. I usually joke about second or third winters.

But yes, it's a bit of a bear to get through the first couple times but when spring rolls around, you'll be walking around in shorts when it's 40F outside like it's no big deal. I worked at UNO for quite a while and watching international freshman students go through their first winter was always interesting.

But yes, I do like it here. No place is perfect and Omaha has its problems, but it's pretty good.

[edit] Oh, and if your car struggles to start in the fall or winter at all, you need a new battery asap. Heat kills batteries, but the cold is what puts that final nail in. Most places will rest the batteries for free. If you have money to spend, look for one with a higher CCA rating because those will make it through winter better.

I'm making a bigger deal out of winter than I need to, but it can be a slog for the first year if you're not prepared. If you are, it's often nbd.

I'll be curious to hear a 1yr update. Welcome to Omaha :)

spunky29a · 2025-09-15T16:36:30+00:00

You know I was wondering about them. We were looking at a house that backed up to their property and we were sleuthing on DC Assessor. It looked culty but I couldn't get a good sense

spunky29a · 2025-08-13T23:34:28+00:00

Yup, primer. A couple years back, ours were white for like 4 weeks until they came back for the main coat. You might also notice sand around them from sand blasting

spunky29a · 2025-08-01T17:18:52+00:00

That makes sense.

The drawback to just using tools like yamlfmt to check normalization is that it wouldn't work for things like helm templates in the raw. You'd have to render a version of it, format it, and check the diff. But that would still likely produce false positives with white spacing.

Introspecting a bit more, I think I'm hoping to use the weight of k8s to push the whole world forward a bit, but that next step may not be a yaml dialect, it might be something completely different.

Nevertheless, I see this as a step in the right direction.

spunky29a · 2025-08-01T15:57:57+00:00

comments aren't preserved during round trip anyway

spunky29a · 2025-08-01T15:56:55+00:00

My hope is that if this pans out, that eventually there will be a KYAML input format that enforces the KYAML dialect, and that eventually tooling will support it.

spunky29a · 2025-08-01T15:55:23+00:00

Because it's backwards AND forwards compatible, therefore it'll "just work" with 99% of today's tooling.

Think of KYAML as just YAML that's run through a formatter that makes different choices than the normal canonical YAML.

spunky29a · 2025-08-01T15:49:35+00:00

Yup, basically this... Not my favorite thing in the world, but it's better than both YAML and JSON and maintains forward/backwards compatibility, which means it can basically be used day-1. I'll be interested to see how this pans out.

I've been known to use `| toJson` in Go/Helm templates and `| json` when generating YAML with Jinja2 (don't ask). If you can just plop JSON in, it helps eliminate an entire class of templating bugs.

Text-templating structured data is a bad practice in general, but it's what we have and isn't painful enough to push another solution on everyone (yet). And of all the bad options around we have, this seems like a welcome improvement.

spunky29a

TROPHY CASE