以太网速度慢,无线网络速度快

以太网速度慢,无线网络速度快

我正在运行带有 Pop OS 18.04 的 Lenovo Legion Y7000P。我的 ISP 是 AT&T。我的 WiFi 测试速度约为 20Mbps 下行、5Mbps 上行,但我的以太网超功率设置(额定上行/下行速度为 600Mbps)仅下行 10Mbps、上行 6Mbps,而我的另一台笔记本电脑可以轻松达到下行 30Mbps,所以我怀疑这是 ISP 的网络造成的问题。

$ sudo lshw -c network给出:

  *-network                 
       description: Wireless interface
       product: RTL8822BE 802.11a/b/g/n/ac WiFi adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:07:00.0
       logical name: wlp7s0
       version: 00
       serial: 80:2b:f9:da:38:1b
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=r8822be driverversion=4.18.0-20-generic firmware=N/A ip=192.168.1.67 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:141 ioport:4000(size=256) memory:a4300000-a430ffff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:08:00.0
       logical name: enp8s0
       version: 15
       serial: e8:6a:64:43:bb:57
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.1.76 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:17 ioport:3000(size=256) memory:a4204000-a4204fff memory:a4200000-a4203fff

$ ethtool enp8s0给出:

Settings for enp8s0:
    Supported ports: [ TP MII ]
    Supported link modes:   10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
                            1000baseT/Half 1000baseT/Full 
    Supported pause frame use: No
    Supports auto-negotiation: Yes
    Supported FEC modes: Not reported
    Advertised link modes:  10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
                            1000baseT/Full 
    Advertised pause frame use: Symmetric Receive-only
    Advertised auto-negotiation: Yes
    Advertised FEC modes: Not reported
    Link partner advertised link modes:  10baseT/Half 10baseT/Full 
                                         100baseT/Half 100baseT/Full 
    Link partner advertised pause frame use: Symmetric Receive-only
    Link partner advertised auto-negotiation: Yes
    Link partner advertised FEC modes: Not reported
    Speed: 100Mb/s
    Duplex: Full
    Port: MII
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
Cannot get wake-on-lan settings: Operation not permitted
    Current message level: 0x00000033 (51)
                   drv probe ifdown ifup
    Link detected: yes

答案1

不太可能是 Ubuntu 问题。

  1. 不用怀疑,事实上它以 100Mbs 而不是 1GB 的速度连接是正常的,许多 PLC 适配器只有 100Mbs 端口。
  2. 这很可能是 PLC 信号被其他东西扰乱的问题,这可能是笔记本电脑的电源装置:

    • 尝试直接通过以太网连接
    • 至少暂时拔掉所有可能的电源线噪声源、电源装置、USB 充电器...

(在我的地方(FTTH),Wifi(200Mbs)比以太网/PLC(70Mbs)要快一些(但不太可靠......))

答案2

从一开始,以太网供电就不是一个好主意。您将高频信号塞入专为 50Hz 设计的电缆中,因此无法保证它会达到全速,甚至根本无法工作

我知道有人退回此类设备是因为它对他们来说效果不佳,还有一些人退回这些设备是因为长长的非屏蔽电缆中的高频信号会对他们的无线设备(如无绳电话或调频收音机)产生各种干扰。在邻居向当地联邦通信委员会投诉电磁干扰后,其他人不得不拆除该设备。

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