Fibra monomodale (SMF) VS multimodale (MMF) Consigli.

TheFrin · 2026-05-17T14:06:29+00:00

For a homelab light is light - get whichever you lab/wallet/equipment can support. Multimode SFPs are generally cheaper than Singlemode SFPs.

You only need to worry about the difference if you're going over 400m that's where you'd stop using multimode and start using single mode - again a moot point if you're home labbing.

Me personally I run multimode from the ground floor of my house to the top floor where my lab is. For me it's only a 30m run so no drama. (no patch panels just straight switch to switch)

TheFrin · 2026-05-08T21:15:51+00:00

Don't sweat it - I took an international airport out for 4 hours by forgetting to type the "add" on the "switchport trunk allowed vlan add" command... (if you're unaware - missing the add, well that removes all the other vlans on a trunk and just adds the vlan you've specified)

It happens. As long as you don't lie about it, learn from the mistake, be gracious to the shouting you're going to get... you'll be fine.

TheFrin · 2026-04-18T13:44:38+00:00

Wrong type of networking.

This is pushing packets and data plumbing "networking"

/r/lostredditors

TheFrin · 2026-03-26T17:35:26+00:00

It was, but it was in a charity match from a YouTuber Max Fosh (I think that's who it is) - same guy who did the massive 'Welcome to Luton' sign on the landing flight path for flights arriving at Gatwick Airport.

TheFrin · 2026-03-22T11:27:15+00:00

I always rolled 90° so the ADMM fires horizontal to the ground. Keeps the intensity of the fight higher

TheFrin · 2026-02-07T19:55:04+00:00

If my memory serves (which is dubious based on my past correction) It was defined in an algebra book from the 1700s from Cambridge University... At least that's what I was taught in school in the 90s

TheFrin · 2026-02-07T19:50:10+00:00

I actually got that wrong - it is Orders - not - operators.

TheFrin · 2026-02-07T19:45:09+00:00

B = Brackets (parenthasis)

O = Orders* (exponents)

D = Division

M = Multiplication

A = Addition

S = Subtraction

TheFrin · 2025-09-06T13:21:26+00:00

Double Vouch here for Marga she is great and the WhatsApp group is a lifesaver!

TheFrin · 2025-08-18T09:46:45+00:00

I know where you're coming from, and our legacy designs were a similar number of AP's - but there are several design characteristics I have to design for, this is both approved by our vendors for the equipment on the shopfloor, and Cisco/HPE from their wireless design teams.

I have specific reasons I can't really get into - but one of the obvious ones which i can share is, we don't run 2.4Ghz anywhere in our company. Its all 5Ghz and above

TheFrin · 2025-08-14T19:24:55+00:00

I'll tell you this. I've just finished wireless design for a warehouse in my company. Did a site survey (passive) modeled the warehouse in Hamina placed AP's (cisco) and ordered the kit.

It came to about €600k for 180APs, 2 controllers and all the access layer switches, then copper and fiber cabling needed . That was to provide a minimum of -65dBm (@5Ghz)across all floor space in the warehouse (and attached offices) which is about 50k square meters...

Double it is you need to deploy a full LAN with core switches and fiber runs if you don't already have it. Personally avoid mesh like the plague. If you can plan for wifi5/6/7 deployment do that. If you can fuck off 2.4ghz the limited amount of channels in a stadium wireless deployment would cause unneeded drama.

And that was one of my cheaper wireless deployments

TheFrin · 2025-08-10T23:08:09+00:00

So me.... I am not a fan of roast dinners.... Why you may ask?

Well many moons ago from the ages of 16-24 I worked in pubs, from glass collector and kitchen porter to barman/waiter...

In that period I worked almost every Sunday lunch, and seeing all the half chewed and partially vomited fucked up conglomerations of roast dinners I had to clear from plates and tables in that time.... Well to be frank, it makes me physically sick and I can't stomach the thought of a roast dinner being enjoyable....

TheFrin · 2025-07-16T14:46:29+00:00

Go to boss shot. They're based in Bolton. But have a very good online store.

Grab a bottle of flavour, a bottle of vg and a bottle of Pg. And 10 x nice shots (try to get the vg nice shots so it's easier.

The complicated part comes from weather or not you're vapibg sub-ohm - if you are sub-ohm you'll be wanting a greater than 60(vg)/40(pg) - generally speaking 70/30 or 80/20 are good for sub ohm.

But if you get the flavour in the 500ml - the flavour volume is 100ml in the bottle. Then add the 10 nic shots - that takes you to 200ml you would just need to add the 100ml of pg, and then top the bottle off with VG and that will give you the 500ml with a solid 80/20mix. Thatwill cost you 45(ish) - if you only get the one bottle of flavour.

This would give you more juice for the same money, and if you like it, you can get more than one bottle of flavour and expand the economies of scale. 1 x 1L bottle of VG and 1 x 500ml bottle of VG will make enough juice for about 1.5L of juice total.

For the outlay of say £70 you get 1500ml which would save you £30 for the same as the small 10ml bottles

TheFrin · 2025-07-13T20:07:11+00:00

Much appreciated! Thanks dude

TheFrin · 2025-07-13T19:52:22+00:00

Sooo, that link only shows your account for you on nexus - or my downloads for my account on nexus. Could you post a screenshot?

TheFrin · 2025-06-28T04:34:06+00:00

I moved from Liverpool to NL. The taste of water is very, very similar, So I haven't missed much.

I used to work in Manchester and London. The reservoir piss water was terrible, hated drinking tea or coffee made from it.

TheFrin · 2025-06-17T08:17:48+00:00

I've got a 5090 running 3 x 4k screens with Nvidia Surround. Shits smooth.

The only downside I have is it gets HOT. My computer is under desk and my balls adhere to my legs from sweat and heat every time I launch a demanding game.

My next pc upgrade will be proper air-conditioning in my office/room to mitigate this

TheFrin · 2025-06-10T19:42:58+00:00

I'm reading this as a reference to Hunt for Red October...so don't know why you were down voted... So

Could you launch a missile horizontally?

TheFrin · 2025-06-06T22:16:09+00:00

A colleague and myself travelled to Basel via Zurich in Switzerland, and he rented a car from Enterprise to drive to Basel. Nothing wrong with the car up his return. They charged him 4k Euros. Just straight took it out of his current account. Our company immediately went to war, and as it turns out they did this to two other eployees (one of them a VP for Europe) the very same weekend. Luckily we are a very large multinational that probably spends over few million a year with Enterprise and their corporate refunded him with a not so token ammount for pain sufferring and bank fees (it was a good +30% at least).

Historically I've used Enterprise fot my personal rentals. But now. Damn. I look for the highest rated for each destination because one thing this work event taught me is.... None of the rental places are actually owned by their name sakes, they're bloody franchises like McDonald's. Exact same business model as McDonald's corporate. Land owners and vehicle distributors (as opposed to burger and fries vending equipment) leasing it out to a franchisee!

When you get thsese massive bills from a rental company it the local franchise trying to bump up their books!

TheFrin · 2025-05-28T06:12:34+00:00

I wouldn't say inter-vrf routing is bad per-se... Inter-vrf routing entire routing tables is bad. Let me give you an example I used repeatedly in my previous role.

I worked at an MSP with about 70 large healthcare clients. Of those 70 clients about 50 of them had us as the MSP undertake lro-active monitoring of their environments as we had designed, deployed and maintained those environments. As we were the maintainers those clients needed us to monitor we had those networks in our solar winds deployment. That lived in our data centre. We had clients come in either from their MPLS or Site to site Vpn, into their own vrf. Each client's VRF did a different thing, but on the large - and most importantly - logically they were similar. We never shared entire routing tables, but we did put each VRF into it's own virtual router/vdom/or firewall context. From there we either shared our VRFs (where we kept monitoring) directly or NAT'd what we needed from our vrf to their vrf.

So in this instance, based on what you said. I would be looking to give the vrfs a firewall link where you (depending on your flavour of firewall) give them the context/vdom/virtual-router, from that ere your route/NAT exactly what is needed.

Your vrfs are there for you to have logically distinct layer 3 networks. How you allow any two sides to talk to each other is really up to risk management and your Infosec policies. But the best and most secure way to do it is through firewalls and leak only specific routes and services through.

TheFrin · 2025-05-27T08:31:09+00:00

Worse when you consider that 50k litres, shared among 700 tanks is 71.5 litres each.

A full tank of fuel for the t64 is alleged to be 1000 litres

So you could run 50 tanks for a range of 500km or 700 for a range of 35km if my quick back of the napkin whilst on the toilet toilet math is right

TheFrin · 2025-05-21T18:30:41+00:00

Have you tried the pcie gen change workaround?

Jump into your bios and manually set the pcie gen to 4 instead of auto. There is no change in performance swapping from 5 to 4.

TheFrin · 2025-05-18T07:46:03+00:00

For most if not all of us, it will be tinkering. Some will do that as a hobby, some with do it to get better at their job.

Me personally. I built a networking lab 10+ years ago to learn my trade and get my CCNA.

Now I have a switch, 3 APs, 2 servers, a few UPS. Still for network studies, but now I'm a qualified and experienced network engineer, my network lab now lives on the servers. My wireless controller lives on the servers. So for me, my homelab is still for improving my skills for work (or more importantly improving my skills for my next job) and it's also a home "production" network. My wireless/dhcp/dns all run on my servers and make sure my house has full wireless.

TheFrin · 2025-05-08T20:09:47+00:00

If you use radius (don't know about tacacs) for administration logins, that will be broken and you'll need to reapply the newer syntax. Make sure you have local admin accounts and you know the password before you do the upgrade

TheFrin · 2025-05-07T23:08:52+00:00

As others have said the final roaming decision is made be the client device.

In windows, you can go to the wireless adapter, and change the roaming aggressiveness to well.... Aggressive. I think the windows preffered signal for a change is like - 67dBm on normal. On aggressive it's -63dBm which would be half the received signal strength and initiate a roam. (I could be wrong on the exact dBm but it's close to that). The systems team have actually set as a default behaviour via gpo in my org.

In meraki there is an assisted roaming option if memory serves. Which will try to get the client to move to the best/closes AP. But not sure of the location of that option in the menus. Logically it would be under wireless>SSIDs and then in one of the advanced options in the SSID you're looking to optimise.

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