KY-888 3孔 HUB + Giga 網路卡

KY-888，在網拍用 350買到，網路上有人兩年前在 ebay 用 7美元買到。
網拍的上架時間為 2017-10-01，所以大約是3年前的產品。

缺點 - 沒有任何指示燈，不清楚連線了沒。尤其是網路的 RJ45 接頭，沒有習慣的燈號。但最大的優點，就是便宜，比 PChome 便宜約 200元，就用吧，終究這東西只是暫時使用。

外觀及拆開的照片，在標籤貼紙下面，有2顆螺絲。拆的時候硬翹，把裡面的塑膠柱翹斷了。還好兩端空的位置很長，用膠帶綁一綁就好了。

USB HUB 晶片，GenesysLogic 的晶片，基本上就是 4port 的 HUB 控制器，其中一個 port 用來連網路界面，剩3個可用。

Realtek 的螃蟹卡 RTL 8153，產品描述「Integrated 10/100/1000m Ethernet controller for usb applications」，是專為 USB 開發的晶片。

Ethernet 驅動晶片。

USB 3.0界面，有8條連接線。

在 Linux 下用 dmesg 看的訊息
[93681.197529] usb 1-1: new high-speed USB device number 53 using xhci_hcd
[93681.325911] usb 1-1: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice= 6.54
[93681.325917] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[93681.325920] usb 1-1: Product: USB2.1 Hub
[93681.325922] usb 1-1: Manufacturer: GenesysLogic
[93681.329863] hub 1-1:1.0: USB hub found
[93681.330132] hub 1-1:1.0: 4 ports detected
[93681.692640] usb 2-1: new SuperSpeed Gen 1 USB device number 105 using xhci_hcd
[93681.707574] usb 2-1: New USB device found, idVendor=05e3, idProduct=0626, bcdDevice= 6.54
[93681.707579] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[93681.707581] usb 2-1: Product: USB3.1 Hub
[93681.707583] usb 2-1: Manufacturer: GenesysLogic
[93681.711581] hub 2-1:1.0: USB hub found
[93681.711896] hub 2-1:1.0: 4 ports detected
[93681.987606] usb 2-1.4: new SuperSpeed Gen 1 USB device number 106 using xhci_hcd
[93682.000171] usb 2-1.4: New USB device found, idVendor=0bda, idProduct=8153, bcdDevice=30.00
[93682.000177] usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=6
[93682.000180] usb 2-1.4: Product: USB 10/100/1000 LAN
[93682.000182] usb 2-1.4: Manufacturer: Realtek
[93682.000184] usb 2-1.4: SerialNumber: 000001
[93682.079954] usb 2-1.4: reset SuperSpeed Gen 1 USB device number 106 using xhci_hcd
[93682.123448] r8152 2-1.4:1.0 eth0: v1.09.9
[93682.191725] r8152 2-1.4:1.0 enp0s20f0u1u4: renamed from eth0
[93682.228349] IPv6: ADDRCONF(NETDEV_UP): enp0s20f0u1u4: link is not ready
[93682.428357] userif-2: sent link down event.
[93682.428367] userif-2: sent link up event.

Linux 的 kernel 的 driver 設定，

title: Realtek RTL8152/RTL8153 Based USB Ethernet Adapters (USB_RTL8152)

symbol: CONFIG_USB_RTL8152:

desc: This option adds support for Realtek RTL8152 based USB 2.0

10/100 Ethernet adapters and RTL8153 based USB 3.0 10/100/1000

Ethernet adapters.

To compile this driver as a module, choose M here: the

module will be called r8152.