| 21 May 2025 |
 magic_rb | In reply to @matthewcroughan:defenestrate.it
yeah this is more jank than just doing infiniband usb c Infiniband is supported by exactly nothing. Idk if youve seen the cost of a infiniband switch | 11:39:14 |
 matthewcroughan @fosdem | Oh, because now I can't find a switch that can take an SFP 10G in, and spit 5GBASE-T out over rj45/cat6 | 11:39:18 |
| magic_rb | Its only economical for p2p connections | 11:39:21 |
| magic_rb | In reply to @matthewcroughan:defenestrate.it
Oh, because now I can't find a switch that can take an SFP 10G in, and spit 5GBASE-T out over rj45/cat6 Sft only switch with modules? | 11:39:41 |
 emily | really? there's tons of cheap multigig switches on amazon | 11:39:41 |
| magic_rb | And look on aliexpress, specially horaco switches, theyre good | 11:40:03 |
| matthewcroughan @fosdem | they only do 2.5G at max, as far as I can tell | 11:40:18 |
| matthewcroughan @fosdem | if they do 10G, they require 10G on the input, not SFP | 11:40:27 |
| matthewcroughan @fosdem | * if they do 10G, they require 10G RJ45 on the input, not SFP | 11:40:41 |
| emily | I mean you can also just get one with multiple SFP slots. | 11:40:52 |
| matthewcroughan @fosdem | there are lots of nice 10G SFP input switches that output 2.5GbE, but none that output more than 2.5GbE whilst taking 10G on the input | 11:41:07 |
| matthewcroughan @fosdem | you mean outputting SFP? | 11:41:16 |
| matthewcroughan @fosdem | no rj45? | 11:41:23 |
| emily | sure. I mean often they'll have 2× SFP and the rest is RJ45. | 11:41:39 |
| emily | so you could have a bunch of 2.5G RJ45 and then an SFP for your laptop. | 11:41:53 |
| matthewcroughan @fosdem | yes, in that case those RJ45s always seem to be limited to 2.5GbE | 11:41:56 |
| emily | and that can go into a Thunderbolt doohickey via DAC/AOC or via 5GBASE-T if you really want. | 11:42:10 |
| matthewcroughan @fosdem | Ah yeah I see what you mean, that works at home but not in the hackspace | 11:42:11 |
| emily | well, you can get ones with quite a lot of SFPs. | 11:42:27 |
| matthewcroughan @fosdem | I'm just looking to have everyone able to jack into 5GbE/10GbE if they have an interface for it, just using rj45 wall panels | 11:42:34 |
| matthewcroughan @fosdem | I'll probably easily be able to achieve 2.5GbE | 11:42:52 |
| emily | you could also just get a 10GBASE-T one. there are cheap-ish 10GBASE-T Thunderbolt adapters. | 11:42:55 |
| matthewcroughan @fosdem | btw I see only one 5GbE usb c adapter on amazon, and it gets bad reviews | 11:43:43 |
| matthewcroughan @fosdem | https://www.amazon.co.uk/TRENDnet-5GBASE-T-Ethernet-2-5GBASE-T-TUC-ET5G/dp/B07TBPLR2V | 11:43:51 |
| emily | I see more. | 11:44:25 |
| emily | e.g. https://www.amazon.co.uk/SABRENT-Type-C-Ethernet-Adapter-Plug/dp/B0DQ9QGQYR/ | 11:45:06 |
| matthewcroughan @fosdem | oooh this looks like exactly what I would want | 11:45:37 |
| matthewcroughan @fosdem | https://www.amazon.co.uk/Binardat-Gigabit-Managed-Ethernet-Bandwidth/dp/B0CY5BHQ8V | 11:45:39 |
| matthewcroughan @fosdem | I just wouldn't want it to be managed | 11:45:47 |
| emily | anyway I just got the Thunderbolt SFP thing as I said. I'm happy with it. planning to hook up a DAC to the BPI for now. | 11:45:57 |
