this post was submitted on 12 Nov 2023
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Last time I asked around on 2.5G ethernet I was told to skip it and go to 10 Gigs straight as its "cheaper" and better than 2.5G. So I started to investigate and I am baffled by the costs. Let me break it down:

Quality 10G switch Mikrotik CRS305-1G-4S+IN ~150 $ (this seems reasonable)

10G SFP+ RJ45 modules - these are starting from 50$ on ebay from china which seems excessive, given i would need at least 4 of them.

10G NIC -Intel X540 T2 for around 40 $ if I want to go with RJ45. X520 with SFP+ connector can be had for 30$ but does not seem to worth it, given then price of SFP+ modules.

So I am somewhere around 430 $ for connecting my NAS and desktop PC via 10Gig. Compared to that, I can upgrade to 2.5G only for approx. 80 $

I could partially go with fiber instead of copper, pushing down the SFP+ module costs to 15$, but i still need at least one RJ45 module to run to my home PC. Also I am concerned fiber will bring some additional complexities that I am not prepared for (have zero experience with it).

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[–] MeisterLoader@alien.top 1 points 1 year ago

I really hate how they decided to make a 2.5g and 5g standard when 10g had already been around for decades. The worst part is that all of the 10g switches that were already out don't recognize 2.5g/5g and just treat them as 1g links.

[–] MiteeThoR@alien.top 1 points 1 year ago

Unlocking Sheng Long in Street Fighter 2.

Long before the Internet existed anything outside of university research, people had to read magazines for gaming information. Games like Street Fighter and Mortal Kombat didn't come with any instructions, so things like special moves and fatalities were unknown until discovered. We used to travel to different arcades and ask people what moves they had heard about/knew from experimentation.

Electronic Gaming Monthly came out with a guide on unlocking a secret character in Street Fighter 2 which had an insane level of difficult circumstances. Everyone was going nuts trying to unlock this character, the conditions were so difficult and so it was hard to prove whether they were met or not.

Turns out it was their first April Fools joke and the whole video game world was duped. By far the most difficult puzzle in a video game is trying to unlock something that isn't there!

https://streetfighter.fandom.com/wiki/Sheng_Long

[–] CameronDev@programming.dev 1 points 1 year ago (1 children)

Is alien.top automatically mirroring posts from reddit, along with their comments?

[–] djgizmo@alien.top 1 points 1 year ago

Don’t use more than two SFP transcievers in that CRS305, it’ll overheat otherwise.

[–] 613_detailer@alien.top 1 points 1 year ago

10G is expensive if you use RJ45. It's not as Benin you use SFP+ DACs or fibre modules.

[–] supercamlabs@alien.top 1 points 1 year ago

Is the 10g on WAN or LAN I think is the real question here.

I think both costs are relative. You could argue 2.5g doesn't make sense but it really depends on need.

If it's WAN then I'd argue both cases are expensive.

If it's LAN then maybe there is a minor cost difference between 2.5g and 10g.

Also just because the network is 10g doesn't mean your gonna get 10g across the network. If WAN ain't 10g not happening. If storage/NAS isn't SSD or SAS not happening. If the motherboard doesn't have enough bandwidth to support the 10g output then it's probably not happening.

[–] electrowiz64@alien.top 1 points 1 year ago

I’m in a Ubiquiti world now. All the 2.5gb switches are more expensive and not many other vendors. SFP switches are more ubiquitous, atleast from Ubiquiti

[–] sk3tchcom@alien.top 1 points 1 year ago

Just went through this - going Netgear XS724EM for primary ($800 Amazon Warehouse). Fiber 2.5G into house via ONT > eero PoE Gateway > Netgear XS724EM > eero Max 7 AP nodes. House wired for CAT6 throughout as we just recently did a remodel.

[–] zap_p25@alien.top 1 points 1 year ago

Get as much core infrastructure stuff as you can with SFP(+ or 28). Uses DACs where the lengths dictate (fairly reasonably priced) and transceivers/glass where you need further runs or confined space pulls to other rooms. Where you absolutely have to go with copper transceivers. For example, the only 10G I run at home over twisted pair is from my synology to my distribution switch. I only have one workstation that runs multigig which is my editing/gaming PC. Everything else is gig so no worries.

[–] DayshareLP@alien.top 1 points 1 year ago

Don't use rj45 use DAC and Fibre

[–] physx_rt@alien.top 1 points 1 year ago

I tend to see 10G SFP+ modules for under $10, LCLC fibre cables are the same for ~10m lenghts and a NIC is, as you said, around $30. So fibre is cheap, but you can also occasionally find Aquantia-based 10GBASE-T (RJ-45) NICs which can do NBASE-T (2.5G and 5G) for $35, which is a good price, considering that these are generally more efficient than the older Intel chipsets and are just as fast.

That aside, your plan sounds good, I hope it'll work out well for you. USB3 adapters are also viable for 2.5G, so you can easily connect laptops and mini PCs that don't necessarily have extra thunderbolt or PCIe connectivity for a 10G NIC. What I suggest you avoid is the 5G USB3-based NICs, because in reality, they can only do around 3.5G and they also run much hotter and are significantly more expensive than the 2.5G variants.

[–] lvlint67@alien.top 1 points 1 year ago

10G SFP+ RJ45 modules - these are starting from 50$

Yeah I avoid 10g over rj45 whenever possible due to cost.

I bought two of the switches you mentioned. Two sfp+ nics.

Two DAC cables

Two single mode fiber sfp+ modules and a length of single mode fiber to connect my desktop on the top floor to the server in the basement.

Yes. It's a little pricey.. but I'm good until 100g becomes affordable in the home....