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That link notes: "Card supports 10Gbit/s and 10/100/1000/2500/5000/10000Mbit/s Ethernet" Nice to see; some NICs are shedding 10/100 support. Apparently, it's
by topspin 6mo ago
That link notes:
"Card supports 10Gbit/s and 10/100/1000/2500/5000/10000Mbit/s Ethernet"
Nice to see; some NICs are shedding 10/100 support. Apparently, it's not necessary to do this, even in a low cost device.
- userbinator 6mo agoLow-cost devices are exactly where 10/100 is still widely used. On PCs, it's a common power-saving mode.
- lostlogin 6mo agoTVs too.
- geerlingguy 6mo agoAnd PoE security cams.
- hsbauauvhabzb 6mo agoFor those of us who don’t know, how does it save power vs a 1gbe running at low throughput?
- adastra22 6mo agoI assume it is for wake-on-LAN. This of course requires the NIC being powered on while the system is sleeping. Lower bandwidth mode = less power draw.
- jech 6mo ago> how does [100BASE-TX] save power vs [1000BASE-T] running at low throughput? 100BASE-TX uses just two pairs (lanes), one for sending and one for receiving. 1000BASE-T uses all four pairs, for both sending and receiving. Therefore, a 100BASE-TX interface that's only receiving needs to power up one pair. A 1000BASE-T interface needs to power all four pairs all the time. I recall reading about some extensions that allow switching off some of the pairs some of the time ("Green Ethernet"), but I think that they require support on both sides of the link, and I'm not sure if they are widely deployed.
- userbinator 5mo ago100M also needs much less signal processing, and at lower speed, than 1G. 10M is even simpler, to the point that even a fast MCU can bit-bang it.
- rincebrain 5mo agoMy only annoyance with "Green Ethernet" things is that often they seem to work poorly. The dedicated machine I still keep around for Windows things has two onboard 2.5GbE ports. It will apparently sometimes, even with all power saving features turned off, randomly negotiate down to 100 mbit if I leave the machine alone for a bit, and then stay at that speed forever unless I manually reset the link after wondering why transferring large amounts of data is bottlenecking severely.
- Tade0 6mo ago100 mode saved me once when I really really really needed to have a connection in that moment, but the ethernet cable glued to the wall that I was using had only three out of eight wires even functioning.
- winter_blue 6mo agoDon’t we need at least four for 100 Mbps?
- Tade0 6mo agoAccording to the technician I spoke with, he could only detect three on their end. The cable was chewed through by cats, so perhaps it was three just in that moment. The connection was overall unreliable, so I guess it must have been four, just not all of the time.
- reaperducer 6mo agoAccording to the technician I spoke with, he could only detect three on their end. The cable was chewed through by cats, so perhaps it was three just in that moment. Ah, the old Cat-3 cable. Been there.
- bluGill 6mo agoThere is two wire ethernet that supports 100. It isn't common, but automotive is starting to use it.
- gsich 6mo ago3 pairs probably. But then again you only need 2.
- t312227 6mo ago-
- oliwarner 6mo agoIs that really true? If so, is there a saner way to handle this than upgrade all the things to 10GBE? Like a POE ethernet condom that interfaces with both network and devices at native max speeds without the core network having to degrade?
- eqvinox 6mo ago> Is that really true? It's not, cf. sibling posts. The GP probably learned networking in the 80ies~90ies when it was true, but those times are long gone. (unless you're talking wifi.)
- HHad3 6mo agoThat is complete nonsense and not how switched networks work.
- the_mitsuhiko 6mo agoThat hasn't been true on switched networks in probably 20 years or so.
- vardump 6mo agoWe have switches now, hubs just don't exist anymore. Switches are not affected by some devices having a lower speed.
- hnlmorg 6mo agoIsn’t that only relevant for network topologies that rely heavily on broadcasting to multiple nodes. Eg token ring, WiFi and powerline adapters? For regular Ethernet, the switch will have a table of which IPs are on which NIC and thus can dynamically send packets at the right transmission protocols supported by those NICs without degrading the service of other NICs.
- 6mo ago
- moffkalast 6mo agoLots of industrial sensors and devices only do 4 wire 100BASE-TX so if there's no fallback to that it would be a paperweight in those situations.
- junon 6mo ago100 is needed for embedded stuff, it'd render a lot of devices unusable (wiznet chips are popular and are 100 only). That'd suck.
- Gigachad 6mo agoIKEA smart home hub is also 100mbit.
- rleigh 6mo agoThere are plenty of embedded chips which only provide RMII. No RGMII or alternatives.
- lucb1e 6mo agoLow cost? The link mentions no price, only a "notify me" button as far as I can see. Does it show a(n estimated) price point for you somewhere?
- jcalvinowens 6mo agoI also appreciate the 10/100 support. I recently needed it for some old voip equipment, and it was shockingly difficult to find an SFP+ module that worked in my 10G switch and supported 100mbps.