by PaulKeeble
21 subcomments
- I feel like we have moved into the era now where if you were putting cabling in the walls for networking you should be choosing fibre now. Not necessarily because we are definitely at the stage where the home needs it, but because the off ramp is clearly happening for ethernet at 10gbit/s and its really high consumption and heat. Switching to fibre after 2.5gbit/s seems like the thing to do now and plenty of us now have access to internet speeds that can exceed 2.5gbit/s.
by wingmanjd
3 subcomments
- Speaking of modules that lie about themselves, unifi has an interesting little device called the "SFP Wizard" that can reprogram sfp modules.
https://www.ui.com/us/en/integrations/accessory-tech/sfp-wiz...
Previously seen: https://news.ycombinator.com/item?id=45732874
- If you are implementing 10 GBE at distances less than 5-7 m, I highly recommend standardizing on DAC cabling. It removes the need for these kinds of conversions that create these kinds of heat signatures.
- I think this is the first time one of my comments has ever gotten mentioned in a subsequent post, so that's cool :)
Glad it was helpful and not me being an idiot. That's a shame about the temp read out. I just checked my MikroTik and can see the same thing. In fact, the only SFP module reporting a temperature at all is the real fiber one, all of the DACs/converters report nothing. No voltage either.
by happyPersonR
0 subcomment
- I know everyone is going to say I’m crazy
But for cabling, OS2 clear bend rated cable … pre-terminated is like the same price and currently have 25gb optics but I’m able to run over 100gb in my house without having to drill holes etc. (runs along the baseboards)
The cables are super thin… and clear/transparent
And I never have to replace the cable again I’m pretty sure haha
The bidi sfp28s $25 are awesome :)
And worst case if your service loop just … loops …. Eh haha
Gonna try using it for other things like hdmi etc too with a cassette :)
by poisonborz
5 subcomments
- Cheap, low-heat 10G copper is already here. RTL8127 NIC is under $50, $200 nets you a quality 4x switch (CRS304-4XG-IN).
by anonymousiam
0 subcomment
- I tried some 10GBase-T 10GTek SFP+ modules about three years ago and they had a serious overheating problem, to the point where they just were not usable.
Within the past year, I've tried a number of Chinese 10GBase-T SFP+ modules with the Broadcom chipset and they've all been great. The one's I've got now are WTTOGTEC and WTSFOPTC, which seem to be the same company. They're dirt cheap at less than $30 each, and they're solid. I've tried both the 30m and 80m variants, and have not had any problems at all.
I've got six of them here that have been running fine full-time for several months. Two of those are in a garage with no climate controls, and summer temperatures lately often over 100℉.
The six modules I'm using are installed in three Ubiquti USW Pro XG 8 PoE switches.
by userbinator
0 subcomment
- Comparative power consumption:
https://www.moduletek.com/en/application_notes/an_00196.html
- If you want a 10GBASE-T SFP+ module that doesn't run hot, look for one with 802.3bz support. Any module that supports 2.5G and 5G speeds has newer silicon which runs cooler.
There is an old but still good list of transceivers with this feature here:
https://www.servethehome.com/sfp-to-10gbase-t-adapter-module...
by debayande
2 subcomments
- Does anyone have any recs for GPON/XGS-PON SFP/SFP+ ONTs-on-a-stick that run cooler than average (say 50-65 °C)?
- I am in the market for an SFP+ module and was looking at this exact model! The serendipity made me smile. Cheers mate.
- Homelabbers, please look past twisted pair. 10 GBit is way past the point of diminishing returns, it's why your NICs are so easily overheating.
Fiber is affordable, and for short distances you can use direct attach copper cables. Basically two SFPs hardwired together. You can order a 3 meter 10 GBit DAC cable for like 20 bucks. And they can be had in lengths up to 10+ meters.
- My lessons on 10G networking at home is here: https://ben3d.ca/blog/home-network-lessons
- i have gfiber 8gb put in my house. a cost-effective high performance setup im using is unifi cloud gateway fiber + 2x microtik CRS305 SFP+ (for all my other 10G devices) + 2x unifi flex 2.5G. this setup gives me a lot of 10G ports for little cost. copper DAC cables are great (optical transceivers and cables also work for longer runs). another great hack for older houses is using goCoax MoCA 2.5 Adapter to run 2.5G around the house via coax cables to your wifi access points.
by DarrisMackelroy
1 subcomments
- tangentially related but useful: A while back I vibed up a script that can bit bang i2c on an x520 to reprogram SFP modules without a dedicated flasher. Hopefully this helps save someone a few $$ if they need to reflash something.
https://github.com/dcmc/x520-sfp-flash
by jcelerier
2 subcomments
- It's crazy to me to think that I was hoping to move my home network to 10GbE in the next few years, around 2006-2007... Twenty years after most home networking is still at the 2005 level of a 30€Netgear GS108
by whatever1
3 subcomments
- To calibrate the discussion, you can get 10GB/s Wifi 7 these days spending less than $200 on a router. No need to drill a single hole in your house/apartment.
Ethernet is dead for home usage. I wish companies gave a damn, but no, for the past 25 years we are stuck at 1GB/s. Only recently some laptops and motherboards started shipping with 2.5GB/s ethernet options.
- I strongly approve of the naming convention. Reggie and Nigel are _excellent_ names.
- Some time ago I was playing around with 10GbE using a Macbook Pro. At the time that meant a Thunderbolt adapter (and still does). Thing is, the one I got was essentially just a giant heatsink [1]. It was a beast and belied just how much of a problem heat distribution was. I'm not an EE so I'm not really sure why, other than by looking at what high bandwidth cables have done since.
10baseT (!0Mbps) came out in 1990 (there were non-twisted pair earlier versions). "Fast Ethernet" (100Mbps) came out in 1995. Copper 1GbE came out in 1999. Copper 10GbE came out in 2006. Ethernet seemed addicted to 10x'ing every version and 10GbE is really where everything fell apart. Or at least, it's where it got hard. We never really got mass market 10GbE. The controllers were too expensive. The cable requirements were quite high. And heat was an issue.
1GbE really was fast enough and 10GbE was a massive jump that I even remember thinking at the time that there should've been intermediate steps, which is what happened in 2016 with 2.5GbE and 5GbE.
Now compare to Thunderbolt, introduced in 2011, which has completely surpassed Ethernet bandwidth, in part by putting chips in the cables, but of course the big difference is cable length. A copper cat 6/7 cable can get to ~100 meters, which is also why the power is so high: attenuation.
but I guess my point is that 10GbE over copper was a mistake. We'd reached the point where you really had to swap over to fiber.
[1]: https://www.ebay.com/itm/127178476193
by jauntywundrkind
1 subcomments
- Recommendations for 25Gbit next please!
- why not use fiber directly and use whatever sfp for much cheaper without worry of heat
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