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无法设置 DHCPv4 路由：Nexthop 的网关无效。网络无法访问

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无法设置 DHCPv4 路由：Nexthop 的网关无效。网络无法访问

/etc/netplan/00-installer-config.yaml

# This is the network config written by 'subiquity'
network:
  ethernets:
    ens192:
      dhcp4: true
  version: 2

/运行/systemd/network/10-netplan-ens192.network

[Match]
Name=ens192

[Network]
DHCP=ipv4
LinkLocalAddressing=ipv6

[DHCP]
RouteMetric=100
UseMTU=true

ip-4a

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
2: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    inet 217.160.244.97/32 scope global dynamic ens192
       valid_lft 39392sec preferred_lft 39392sec

ip -4 路由

default via 10.255.255.1 dev ens192 proto dhcp src 217.160.244.97 metric 100
10.255.255.1 dev ens192 proto dhcp scope link src 217.160.244.97 metric 100

服务 systemd-networkd 状态

● systemd-networkd.service - Network Service
     Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
     Active: active (running) since Mon 2020-05-11 06:30:58 UTC; 1h 5min ago
TriggeredBy: ● systemd-networkd.socket
       Docs: man:systemd-networkd.service(8)
   Main PID: 928 (systemd-network)
     Status: "Processing requests..."
      Tasks: 1 (limit: 38422)
     Memory: 3.8M
     CGroup: /system.slice/systemd-networkd.service
             └─928 /lib/systemd/systemd-networkd

May 11 06:30:58 local systemd[1]: Starting Network Service...
May 11 06:30:58 local systemd-networkd[928]: Enumeration completed
May 11 06:30:58 local systemd[1]: Started Network Service.
May 11 06:30:58 local systemd-networkd[928]: ens192: IPv6 successfully enabled
May 11 06:30:58 local systemd-networkd[928]: ens192: Link UP
May 11 06:30:58 local systemd-networkd[928]: ens192: Gained carrier
May 11 06:30:58 local systemd-networkd[928]: ens192: DHCPv4 address 217.160.244.97/32 via 10.255.255.1
May 11 06:30:58 local systemd-networkd[928]: ens192: Could not set DHCPv4 route: Nexthop has invalid gateway. Network is unreachable
May 11 06:30:58 local systemd-networkd[928]: ens192: Failed

我不知道如何解决这个问题！几天前我一直在尝试解决这个问题，但仍然没有找到答案。

答案1

我发现在文件 /etc/netplan/00-installer-config.yaml 中添加“critical: true”可确保接口不会定期关闭（似乎是 IONOS 的问题）。该文件应如下所示：

# This is the network config written by 'subiquity'
network:
  ethernets:
    ens192:
      dhcp4: true
      critical: true
  version: 2

然后运行：

$ sudo netplan generate
$ sudo netplan apply

这应该有助于解决任何网络中断问题。

答案2

你只需要执行UseRoutes=no，但要激活UseGateway=yes。你可以看看我的默认配置。

/etc/systemd/network/default.network

[Match]
Type=!loopback

[Link]
RequiredForOnline=yes

[Network]
DHCP=yes

[DHCPv4]
UseRoutes=no
UseGateway=yes

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