5 ms·
Mikrotik makes a 4xSFP+ switch and Ubiquiti makes a 4x10GBase-T switch. The Mikrotik one can take SFP+ copper transceivers, so it allows you to mix and match tw
by cpgxiii 5y ago
Mikrotik makes a 4xSFP+ switch and Ubiquiti makes a 4x10GBase-T switch. The Mikrotik one can take SFP+ copper transceivers, so it allows you to mix and match twisted pair and fiber optics if you need it. Asus makes a pair of Aquantia (now Marvell) 10G PCIe x4 cards, one with SFP+ and the other with 1/2.5/5/10G Base-T. Other vendors have similar cards in PCIe x4 and Thunderbolt 2/3 formats.
- zrail 5y agoI just picked up a Mikrotik CRS305 from Amazon and a pair of used Intel X520T dual SPF+ cards from eBay, plus a couple DAC (direct attach copper) cables for maybe $300 total. I'm very happy with the performance of this setup. One thing to keep in mind about the CRS305 is that it can't handle more than one or maybe two SFP+ copper modules. They use a lot of power and put out a lot of heat. I think the CRS309 has fewer restrictions.
- csdvrx 5y agoCould you recommend a PCIe adapter to receive a Nokia 3fe4960ac SFP+ transceiver (AT&T fiber) and maybe one or two 2.5G or 10G modules?
- zrail 5y agoOh I have no idea. You'd need to do some digging. I picked the Intel card because it was decently priced and I knew it would be reasonably compatible with what I was doing. Sounds like maybe you want a quad SFP+ card?
- ComputerGuru 5y agoYou can’t bypass AT&T’s absolutely craptastic fiber modem, even if you got the bidi transceiver you needed. The connection is encrypted with keys hardcoded into the modem.
- csdvrx 5y agoAnd this thing doesn't have a JTAG?
- d136o 5y agoFor their craptastic router you could downgrade the firmware, use an old exploit to root, extract the keys, and then use those keys on your own Linux box to authenticate as the router… For the fiber ONT (what I realize now you may be calling their fiber modem) I would love to see a similar attempt to get their hardware out of the loop.
- ComputerGuru 5y agoYeah, I’m referring to the ONT - which is now additionally bundled into their router + wifi box. There’s similar exploit to bypass the router part of the equation but you still need the ONT to negotiate the connection.
- csdvrx 5y agoDo you have a link to this exploit?
- toast0 5y agoIs it actually encrypted? or is it just 802.1x like it used to be (I moved away from the service area when they were still doing separate ONT and crappy 'internet gateway' that turned ethernet into ethernet.
- ComputerGuru 5y agoThe latter. The session negotiation is encrypted. You can technically shelve the unit after that’s been negotiated but it would need to be plugged back in each time your connection reset for some reason.
- toast0 5y agoYou can also keep the unit online, but only pass it the 802.1x frames. You'll be out pennies of electricity, of course.
- geerlingguy 5y agoThe transceivers get up to 90-95°C (enough to leave a little burn!) if you plug them next to each other. They can work in that configuration (with up to 4 in that enclosure) but I'd only do it if you have a fan on the thing. It relies entirely on passive ventilation, and the enclosure gets hot, too, like 60°C or more!
- zrail 5y agoOh hey I just read the post about transceivers being slow only in one direction. I have the same problem on a different scale. Two X520T cards, one in a Dell T20 and the other in a Dell T30. Both connected with DACs to the CRS305. 9.something Gbps one direction, 7.something Gbps the other. I haven't bothered to do much actual diagnosis on this because I'm satisfied with the speed as-is, but it's another illustration of weirdness where you'd least expect it.
- geerlingguy 5y agoYeah; I've noticed asymmetric speeds in certain situations with the CRS305 as well... I thought it was just me, but I'm glad (sad?) to know someone else sees the same thing too :)
- Xamayon 5y agoI find having a 120mm pc fan sitting on top blowing down through the case's top holes keeps everything sane. A 120mm fan matches the size almost perfectly, and there are even some usb powered ones available online. Running the fan slow and with rubber standoffs to help air move freely allows it to be nearly silent. Without that, even a single sfp+ to rj45 copper module can overheat and become unstable under load. Other than that the switches work great, perfect option for small scale cheapish 10G networking.