当我在 Ubuntu Server 20.04 中使用 Netplan 设置静态 IP 时，遇到了网速问题。
我正在使用戴尔 PowerEdge R710，没有 wifi 卡，所以我在论坛上找到的所有涉及 wifi 的解决方案都不起作用。我还尝试了 Netplan 中的其他几种配置以及我在论坛上找到的其他建议，但确实不起作用。
如果我禁用静态 IP 并让其为动态 IP，互联网速度就会很好。有人知道如何解决这个问题吗？
这是我的50-云-初始化.yaml
aiec@camera02:/etc/netplan$ sudo nano 50-cloud-init.yaml
network:
renderer: networkd
ethernets:
eno1:
dhcp4: no
addresses: [192.168.253.188/24]
gateway4: 192.168.253.1
optional: true
nameservers:
addresses: [8.8.8.8,8.8.4.4]
version: 2
这速度测试结果（如果我使用动态 IP，速度将达到 40~45 Mbits/s）
aiec@camera02:/etc/netplan$ speedtest
Retrieving speedtest.net configuration...
Testing from Live Telecom (177.66.74.126)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by StarFibra Telecomunicações (Foz do Iguaçu) [4.05 km]: 58.244 ms
Testing download speed................................................................................
Download: 2.12 Mbit/s
Testing upload speed......................................................................................................
Upload: 1.37 Mbit/s
还有配置文件
aiec@camera02:/etc/netplan$ ifconfig -a
eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.253.188 netmask 255.255.255.0 broadcast 192.168.253.255
inet6 fe80::be30:5bff:fefe:671 prefixlen 64 scopeid 0x20<link>
ether bc:30:5b:fe:06:71 txqueuelen 1000 (Ethernet)
RX packets 162999 bytes 174965858 (174.9 MB)
RX errors 0 dropped 6421 overruns 0 frame 0
TX packets 78785 bytes 42246324 (42.2 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno2: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether bc:30:5b:fe:06:73 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno3: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether bc:30:5b:fe:06:75 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eno4: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether bc:30:5b:fe:06:77 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 1084 bytes 96330 (96.3 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1084 bytes 96330 (96.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
答案1
好的，经过和一些朋友的几次交谈，我们发现了问题所在。其实很简单。
问题出在网关上。当我使用命令时网络状态监测，它返回：
aiec@camera02:~$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.253.1 0.0.0.0 UG 0 0 0 eno1
0.0.0.0 192.168.253.254 0.0.0.0 UG 0 0 0 eno1
192.168.253.0 0.0.0.0 255.255.255.0 U 0 0 0 eno1
192.168.253.254 0.0.0.0 255.255.255.255 UH 0 0 0 eno1
网关必须结束.254，而不是.1。
因此，对我来说，使用 netplan 的正确方法是输入网关4：192.168.253.254。
renderer: networkd
ethernets:
eno1:
dhcp4: no
addresses: [192.168.253.188/24]
gateway4: 192.168.253.254
optional: false
nameservers:
addresses: [8.8.8.8,8.8.4.4]
version: 2
现在，我的网络状态监测， 返回：
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.253.254 0.0.0.0 UG 0 0 0 eno1
192.168.253.0 0.0.0.0 255.255.255.0 U 0 0 0 eno1
就是这样。感谢那些试图帮助我的人。
答案2
您可能通过 DHCP 收到其他各种会影响吞吐量的设置。如果 IP 地址和网关地址相同，则接下来要查看的是 MTU。如果您的默认 MTU 太大，则由于数据包碎片，您的吞吐量可能会较低。