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以太网连接时停用 WiFi

tag-icon • tag-icon networking wireless ethernet
以太网连接时停用 WiFi

多年来，我在 Ubuntu 16.04 LTS 中一直使用相同的设置。今天早上突然无法访问互联网，除非我关闭 WiFi。我只能在关闭 WiFi 或以太网的情况下访问。

我已经多次重启笔记本电脑，运行sudo apt update && sudo apt upgrade，重启路由器并查看路由器配置：

shaw 路由器.png

WiFi 卡的“DHCP-Reserved”设置很显眼。我的所有 IP 地址都是静态的：

$ cat /etc/hosts

127.0.0.1   localhost
127.0.1.1   alien

# Add to router static IP address list
192.168.0.10    alien  AW 17R3 WiFi                   9c:b6:d0:10:37:f7
192.168.0.12    alien  AW 17R3 Ethernet               28:f1:0e:2a:1a:ed
192.168.0.11    phone  Moto E4 Plus                   d0:77:14:c8:bc:e5
192.168.0.13    dell   Inspiron 17R-SE-7720 Ethernet  5c:f9:dd:5c:9c:53
192.168.0.14    dell   Inspiron 17R-SE-7720 WiFi      60:6c:66:86:de:bd
192.168.0.15    hs100  Sony TV Wall Light             50:d4:f7:eb:41:35
192.168.0.16    android-47cdabb50f83a5ee  Sony Bravia TV KBL 50W800C
192.168.0.17    hs103  Toshiba 32" TV                 18:4F:32:8D:AA:97

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

以太网和 Wifi 卡：

$ lspci -v | grep -i net -A6
3b:00.0 Ethernet controller: Qualcomm Atheros Killer E2400 Gigabit Ethernet Controller (rev 10)
    Subsystem: Device 0707:2400
    Flags: bus master, fast devsel, latency 0, IRQ 16
    Memory at dd600000 (64-bit, non-prefetchable) [size=256K]
    I/O ports at d000 [size=128]
    Capabilities: <access denied>
    Kernel driver in use: alx
--
3c:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
    Subsystem: Bigfoot Networks, Inc. QCA6174 802.11ac Wireless Network Adapter
    Flags: bus master, fast devsel, latency 0, IRQ 137
    Memory at dd200000 (64-bit, non-prefetchable) [size=2M]
    Capabilities: <access denied>
    Kernel driver in use: ath10k_pci
    Kernel modules: ath10k_pci

不确定路由是否相关，但它在这里：

$ route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.0.1     0.0.0.0         UG    100    0        0 enp59s0
0.0.0.0         192.168.0.1     0.0.0.0         UG    600    0        0 wlp60s0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 enp59s0
192.168.0.0     0.0.0.0         255.255.255.0   U     100    0        0 enp59s0
192.168.0.0     0.0.0.0         255.255.255.0   U     600    0        0 wlp60s0

编辑于 2021 年 2 月 2 日

问题是，当以太网和 WiFi 都连接时，DNS 查找不起作用。互联网可通过直接 IP 寻址获得。当 Wifi 和以太网都连接时，查看路由器的值似乎在发生变化？

shaw 路由器客户端电脑.png

所以现在我将进入 DNS 兔子洞......

答案1

以太网连接时停用 WiFi

首先，我尝试从 ISP 获取新的电缆调制解调器。

然后我发现了一个当以太网（网络）连接时自动禁用WiFi的脚本：

#!/bin/bash
export LC_ALL=C

enable_disable_wifi ()
{
    result=$(nmcli dev | grep "ethernet" | grep -w "connected")
    if [ -n "$result" ]; then
        nmcli radio wifi off
    else
        nmcli radio wifi on
    fi
}

if [ "$2" = "up" ]; then
    enable_disable_wifi
fi

if [ "$2" = "down" ]; then
    enable_disable_wifi
fi

脚本必须在特定目录中创建。创建后将其标记为可执行：

chmod a+x /etc/NetworkManager/dispatcher.d/70-wifi-wired-exclusive.sh

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