我正在尝试在启动时拥有正确配置的 Ubuntu 20.04 服务器网络。我有一个连接到中继的物理接口，因此我想在其上定义一些 vlan 标记接口。我正在使用 netplan。内容/etc/netplan/50-cloud-init.yaml如下：
network:
ethernets:
eno1:
match:
macaddress: b8:83:03:XX:XX:XX
mtu: 1500
eno2:
...
version: 2
vlans:
vlan3110:
id: 3110
link: eno1
dhcp4: no
addresses: [X.X.X.X/24]
gateway4: X.X.X.X
vlan3112:
id: 3112
link: eno1
dhcp4: no
vlan3111:
id: 3111
link: eno1
dhcp4: no
现在，如果我重新启动系统，则不会为 vlan3110 分配任何 IP：
#ip a
...
9: vlan3110@eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether b8:83:03:XX:XX:XX brd ff:ff:ff:ff:ff:ff
inet6 fe80::ba83:3ff:XXXX:XXXX/64 scope link
valid_lft forever preferred_lft forever
...
我不知道为什么。我-vv在networkd-dispatcher启动选项中添加了/etc/default/networkd-dispatcher：
networkd_dispatcher_args="--run-startup-triggers -vv"
但我看不到任何明确的问题：
# journalctl -b | grep vlan3110
Dec 01 17:45:17 hce02 networkd-dispatcher[1565]: DEBUG:Running immediate triggers for NetworkctlListState(idx=9, name='vlan3110', type='vlan', operational='degraded', administrative='pending')
Dec 01 17:45:17 hce02 networkd-dispatcher[1565]: DEBUG:Ignoring notification for interface NetworkctlListState(idx=9, name='vlan3110', type='vlan', operational='degraded', administrative='pending') entering state 'pending': no triggers
Dec 01 17:45:17 hce02 networkd-dispatcher[1565]: DEBUG:Ignoring notification for interface NetworkctlListState(idx=9, name='vlan3110', type='vlan', operational='degraded', administrative='pending') entering state 'degraded': no triggers
networkctl输出如下：
# networkctl status vlan3110
● 9: vlan3110
Link File: /run/systemd/network/10-netplan-eno1.link
Network File: /run/systemd/network/10-netplan-eno1.network
Type: vlan
State: degraded (configured)
Driver: 802.1Q VLAN Support
HW Address: b8:83:03:4d:ca:48 (Hewlett Packard Enterprise)
MTU: 1500 (max: 65535)
Queue Length (Tx/Rx): 1/1
Auto negotiation: yes
Speed: 1Gbps
Duplex: full
Port: tp
Address: fe80::ba83:3ff:fe4d:ca48
Dec 01 18:18:08 hce02 systemd-networkd[1444]: vlan3110: netdev ready
Dec 01 18:18:08 hce02 systemd-networkd[1444]: vlan3110: IPv6 successfully enabled
Dec 01 18:18:08 hce02 systemd-networkd[1444]: vlan3110: Link UP
Dec 01 18:18:12 hce02 systemd-networkd[1444]: vlan3110: Gained carrier
Dec 01 18:18:14 hce02 systemd-networkd[1444]: vlan3110: Gained IPv6LL
如果我删除链接并netplan apply在服务器完成其启动过程后调用，则 IP 将按预期分配：
# ip link delete dev vlan3110
# netplan apply
有人知道发生了什么事吗？