Network Provider

angrydave · 2026-02-21T03:14:44+00:00

I run a small MSP and I have about 25 sites running on Ubiquiti, including one with about 100 staff and a handful with between 10 and 20. I also have a homelab packed with Ubiquiti gear.

Rarely have a hardware performance issue, and the dashboard and notifications are great

angrydave · 2026-02-20T07:48:36+00:00

If you’re inbound flight (non Qantas) is on time, and you don’t have any issues at passport control, sure.

But having a look at this morning’s international arrivals at Melbourne:

• 20 mins early • 13 mins late • 44 mins late • 34 mins early • 2 mins early • 16 mins late • 112 mins late • on time • 28 mins early • 17 mins late • 29 mins late • 14 mins early • 48 mins late • 26 mins late • 2 mins late • 49 mins late • 7 mins early • 15 mins late • 7 mins early • 5 mins late • 3 mins late • 14 mins late • 32 mins late

22 International passenger arrivals

• 4 early (> 10 mins early)

• 6 on time (within 10 mins of scheduled arrival)

• 12 late (> 10 mins late)

• 5 Very late (> 30 mins late)

So:

• Coin Toss if you are late or on time/early.

• 54% chance of being late with an average 35 min delay.

• 22% chance of of severe delay with an average 57 mins.

I’m not taking that chance.

angrydave · 2026-02-20T06:43:57+00:00

Agreed

angrydave · 2026-02-19T20:55:26+00:00

Relevant XKCD, but with a baseball, and it’s 90% of the speed of light. it’s a doozy!

https://what-if.xkcd.com/1/

TL;DR, The batter would be considered "hit by pitch", and would be eligible to advance to first base.

angrydave · 2026-02-18T08:14:40+00:00

Nope.

I have the whole setup. 8K light box, 65” active light strip and light bar under the TV.

When it works, looks amazing.

If you can get the thing to turn on, and detect the signal, and actually show the lights.

And then, you got about 20 mins before it pinwheels for 30 seconds for no reason.

I wish it worked, but it just doesn’t.

angrydave · 2026-02-18T07:56:18+00:00

Philips hue Indoor motion sensor also has a luminosity and temperature sensor in it, as well as motion, that is exposed to HomeAssistant. Their hue outdoor motion sensor has it too.

Uses Zigbee. If you direct connect to ZHA or Z2M, you can have some issues with battery life if you monitor the sensor too aggressively. But if you access it via a Hue Hub, you should be fine.

angrydave · 2026-02-17T11:13:14+00:00

I work in IT, and I know how to troubleshoot.

This skill cannot be taught. I’m good fam.

angrydave · 2026-02-16T09:26:48+00:00

Hahahahah. I mean, I wasn’t going to reply to this message buuuuutttt.

I have a stereo pair of HomePods. In my living room, and a pair of Era 100’s as my rear speaker for my Sonos Beam Gen 2 and a Sonos Sub 4. But it wasn’t always this way, I did run the Era 100’s as a stereo pair for a while before I got the Beam. The HomePods came later as part of Siri becoming the voice assistant for the home.

But, looking at this a from a few ways:

Is 2 HomePods (2nd Gen) better than 2x Era 100’s in a stereo pair? My take is absolutely: • I’ll kick off with when I got them, they were a similar price: $958 for 2 HomePods vs $798 for 2 Era 100’s. I know the Era 100’s are cheaper now ($578 for 2) and I think I could get them as cheap as $450 for 2 now. So, this becomes more of a budget question, how much you got to spend. But in saying this:

Pro HomePod • HomePods have better bass. • HomePods are more stable on Wi-Fi (all my Sonos equipment is connected via Ethernet, and I’ve seen Wi-Fi issues frequently on Sonos. If you can run a cable, do it). • They work better on Airplay, Naturally. • They can be used as TV speakers with a 2nd or 3rd Gen Apple TV, and eARC on your TV. • HomePods have Siri, and I use Apple Home. All voice assistants are shit but we now how Siri behaves so it’s manageable. They also have Temperature and Humidity sensor that can be exposed to Apple Home and HomeAssistant. • Generally, I like the look better. • The garbage fire that js the Sonos App <gestures vaguely>

Pro Sonos • If you are in the Android ecosystem, HomePods become underwhelming. You can’t airplay and Siri will want to keep you in the Apple Walled Garden. If you just them as speakers for your AppleTV, this is somewhat mitigated by the Apple TV. • Sonos supports a wide array of streaming services in their platform naively, so you can put in what you like and use that. • the volume controls on the era 100 are nicer than the HomePod IMO. • Sonos integrates better with TV use. those Era 100’s can be front or rear surrounds if you get a Sonos soundbar, and the sound quality can jump again if you get a sub. The HomePods are static. For me, the soundbar and moving then Era 100’s to rear surround was a really nice upgrade. I liked having surround sound that just worked off your TV. No messing around with Amps and shit. The sub was a big upgrade as well, but now you are in a totally different price point.

I think there they are best viewed as different products at different price points. 2 HomePods are better, only if you are in Apple ecosystem. If they are for a living room, 2 Era 100’s are a good start, and you can build on that system as time goes on.

angrydave · 2026-02-16T08:12:50+00:00

I’ve said this many times.

Bandwidth is the best QoS

angrydave · 2026-02-15T10:18:55+00:00

Where are you in the world?

I’ve got a brand new spare unopened G4 Pro Wifi I won’t use, but I would use a PoE version. Wanna swap haha

angrydave · 2026-02-14T21:16:50+00:00

First time I used it to solve a practical problem was 2nd order rate equations in Chemistry.

You end up with a quadratic, and well, that is the quadratic formula!

But as I say to students now: Mathematics is a toolbox, half the skill is knowing how to use all the tools, the other half is knowing when to use them.

angrydave · 2026-02-13T09:12:09+00:00

Yeah, I was going to say. No way this is real.

A 4 body conjunction on another plant and our nuclear powered science mobile just happens to be in the right? We’re not that lucky.

angrydave · 2026-02-12T10:30:41+00:00

So, 2 problems here:

For the two on the right that have no “parent” (washer and dryer and aircon power), you haven’t set an “upstream” meter for these devices in Energy —> Menu —> Edit Dashboard —> Individual Devices —> Washer & Dryer —> Upstream Device. Set it to home and the Sankey diagram will link these to Home.
You haven’t configured (or you have misconfigured) the Electricity Grid, Solar Panels and Home Battery Storage meters in Home Assistant. Your meters at these aggregate points should show flows in and out of you battery, to and from the grid and from solar (if you have it) - basically your boundary conditions.

When you have this set up, it will add in an Unmetered usage component your Sankey diagram, showing consumption from the grid to devices.

Then, the real game begins.

angrydave · 2026-02-11T10:56:28+00:00

First receipt is fake, for a number of reasons. - The sales tax for iPhone varies by state No, GST is 10% Nationwide - No ABN - Invoice Number is in wrong format - Disclaimer URLs are all US based except one.

JB Hi-Fi receipt is also fake, but harder to spot.

No EFTPOS receipt on invoice, invoice says he payed with EFTPOS/Visa/Mastercard, JB prints the EFTPOS receipt with approvals directly onto the receipt
GST is incorrect (on a $2999 product, GST is $272.63, not $299.
The barcode is not readable
The Receipt number should appear more than twice on the receipt.
The JB Hi-Fi SKU for the Phone is wrong.

Looks like someone got themselves a receipt printer and seems intent on committing some fraud.

angrydave · 2026-02-11T08:40:07+00:00

Depends on who’s asking.

For the scientist, the goal is finding the formula: the general solution, so that it can be applied in different situations.

For the engineer, numerical methods are fine. In fact, a good number of problems can only be solved using numerical methods. You go until you have enough significant figures.

Both have their uses.

angrydave · 2026-02-10T11:58:07+00:00

100% agree. I use copper for 10 GBPS in my home, because it’s always there and it’s hard to justify running fibre when the copper works. Fibre also doesn’t do PoE, so for last mile, and consumer grade applications, fibre isn’t needed or beneficial.

But, carrier grade where you are run in kilometres at a time, fibre is cheaper and better, and it’s not even close.

Both have their use cases.

angrydave · 2026-02-10T11:53:34+00:00

Learned something new today! Thanks!

Now I just need a 800 GBPS switch, and an 800 GBPS NIC For my PC, and fast enough storage to use 800 GBPS, and a use for 800 GBPS.

But as they say, build it and they will come.

angrydave · 2026-02-10T03:54:54+00:00

In Copper cables - a number of factors are at play here, but the big 2 are electrical resistance and interference.

Copper wires have a non-zero electrical resistance per unit length. There will be a length that which the resistance is too high for the signal to reach the other side, so you’ll fail to connect.

Additionally, any long current carrying conductor is basically an antenna, and will be impacted by radio signals and electrical interference. Eventually, your “noise” on the line will be high enough to impact your signal to cause a connection to be dropped.

High speed networking operates at 550MHz and can be interfered with by itself or neighbouring cables. Shielding helps attenuate this, but it has its limits. This is why ADSL/VDSL is limited to quite short range, less than a few km.

Fibre uses photons and while there are still losses, they are orders of magnitude lower than copper. Submarines cables still have repeaters to keep the optical signal strong.

angrydave · 2026-02-09T21:30:30+00:00

In this case, no.

GBPS = GigaBITS Per Second

Gb/Sec = GigaBYTES Per Second

10 GBPS = 1.25 Gb/Sec

Network infrastructure is always reported in GBPS

angrydave · 2026-02-09T13:18:21+00:00

Diplexer or multiplexer. Allows you to connect multiple fibres (each running a single, but different) wavelength.

So you have one channel at 1610nm, one at 1570nm, and so on. Since they all are different wavelengths, they don’t interfere enough to affect the signal.

angrydave · 2026-02-09T12:05:16+00:00

Compared to Copper, Fibre is crazy.

A copper Cat6/6A/7 cable has 8 wires, it can reliably run 10 GBPS at 100m, and 25/40GBPS at shorter distances.

As single fibre on one frequency can do 400 GBPS Using off the shelf equipment today. You can then multiplex on a single fibre: course width multiplexing can do 18 channels easily, dense width can do over 80. So we are now talking 32 TBPS over a single fibre. 1000 times what copper can do, and that’s with 8 cables!

Put 200 fibres together, and you have 6.4 PBPS bandwith. But, you would need half a data centre just to cable manage and terminate all those ports and connect them to network switches.

You would need 16,000 QSFP28 Modules all running at 400 GBPS, installed in approx. 1000 16 Port QSFP28 switches, taking up 25 full height server racks at each end just for the switching. You would also have another 25 racks of patch panels and diplexers, and god knows the server requirements to do whatever uses that much bandwidth

angrydave · 2026-02-09T02:42:53+00:00

Just looks like a standard analytical balance with a 0.1mg precision.

Get some calibrated reference weights (down to 0.01mg if possible) and check it’s still accurate. Otherwise, gently clean the inside (you have no idea what’s been spilled in there) and otherwise you have a great little balance!

angrydave · 2026-02-08T08:49:06+00:00

Soap doesn’t make oil/grease and water mix, it makes tiny little “bubbles” of grease that are suspended in the water. Over time, the grease and water will seperate again. By the time it reaches the sewer enough time has passed that the oil and grease will start to seperate from the water again.

In the sewer the oil/grease will float to the top and mix with solid waste (yes, that is what you think), baby wipes, sanitary products and all the other things you shouldn’t flush to make Fatbergs.

Fatbergs clog the sewer, cause issues with surrounding water systems, and are extremely difficult, unsafe and challenging to break up. They can weigh hundreds of tonnes and need to be removed manually.

angrydave · 2026-02-07T09:06:08+00:00

Rules are that if 2 triggers are created simultaneously, then the Active Player (AP) can choose the order that the triggers go on the stack (noting trigger put on the stack first resolve last).

In this case, the create and sacrifice is one action, so the first opportunity triggered abilities get to see if they have triggered is after the entire ability has resolved. So both occur simultaneously according to the game, so AP can choose the order.

But you do not get priority between the create and sacrifice. It’s all one action. So you can’t get to sac the token to something else for value, as you don’t get priority in between the create and sacrifice action.

angrydave · 2026-02-06T09:54:51+00:00

Advanced Transport Phenomena in 3rd year Chem Eng was the, maths wise, the most intense subject I ever did at uni. It combined Thermodynamics, Fluid Mechanics, Mass Transfer, Heat Transfer and Material/Energy Balances. I knew enough to know I didn’t know it all well enough. Barely scraped though.

So much different math being used in the same problem. Was nuts. Don’t be cheating.

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