It seems $29 buys you shielding from interference. Corp.Įth1: register 'asix' at usb-0000:0e:00.0-2.1.2, ASIX AX88772 USB 2.0 Ethernet, 00:8a:8d:8a:39:2bĪlso, the hardware MAC address prefix (00:8a:8d) isn't any known vendor OUI (organisationally unique identifier.) Seems odd, although chipset vendors (like ASIX) often require the device manufacturer to register their own OUI (for instance the Apple adapter uses an Apple prefix.) For a no-name vendor, it makes sense to just make one up. Usb 3-2.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Usb 3-2.1.2: New USB device found, idVendor=0b95, idProduct=772a There are a few unusual things about the cheap adapter, though. By comparison, the builtin ethernet on my laptop measured 94.8Mbps (after being set from gigabit to 100Mbps.) Oddities The Apple adapter measured throughput of 94.3Mbps. When I ran a TCP throughput test with iperf, they both performed well. The cheap adapter comes with drivers for OS X & Windows, as well. Internet lore seems to agree that any Mac running OS X 10.5.2 or later can use it. In Linux they both use the driver for an "ASIX AX88772A" USB to Ethernet converter, even though the Apple one reports as "Apple" and is sold only for the MacBook Air. The other is sold at Apple Stores for $29. One of them is sold on ebay for $3.85 AU ($3.99 US), including postage to Australia. Taking apart a very cheap USB to Ethernet adapter and pondering on the parts found inside.
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