好的，设置如下：DHCP 服务器为特定 MAC 地址分配 IP。相关机器有多个 NIC，其接口名为 eth0-5。顺便说一下，只有一个 NIC 连接，即 MAC 地址为 00:30:18:08:03:f5 的 NIC。
Netplan 配置如下：
ethernets:
eth0:
dhcp-identifier: mac
dhcp4: true
match:
macaddress: 00:30:18:08:03:f0
optional: true
eth1:
dhcp-identifier: mac
dhcp4: true
match:
macaddress: 00:30:18:08:03:f1
optional: true
eth2:
dhcp-identifier: mac
dhcp4: true
match:
macaddress: 00:30:18:08:03:f2
optional: true
eth3:
dhcp-identifier: mac
dhcp4: true
match:
macaddress: 00:30:18:08:03:f3
optional: true
eth4:
dhcp-identifier: mac
dhcp4: true
match:
macaddress: 00:30:18:08:03:f4
optional: true
eth5:
dhcp-identifier: mac
dhcp4: true
match:
macaddress: 00:30:18:08:03:f5
optional: true
version: 2
但每次启动时，都会有一个不同的接口获取 MAC 和 IP。以下是 ifconfig 显示的内容：
eth0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:30:18:08:03:f0 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
device memory 0xdf160000-df17ffff
eth1: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:30:18:08:03:f1 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
device memory 0xdf140000-df15ffff
eth2: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:30:18:08:03:f2 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
device memory 0xdf120000-df13ffff
eth3: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:30:18:08:03:f3 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
device memory 0xdf100000-df11ffff
eth4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.2.1.40 netmask 255.255.255.0 broadcast 10.2.1.255
ether 00:30:18:08:03:f5 txqueuelen 1000 (Ethernet)
RX packets 220 bytes 21996 (21.9 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 178 bytes 28347 (28.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xdf200000-df220000
eth5: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:30:18:08:03:f4 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
device memory 0xdf000000-df01ffff
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
loop txqueuelen 1000 (Local Loopback)
RX packets 2868 bytes 204492 (204.4 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2868 bytes 204492 (204.4 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
请告诉我如何将 eth5 设置为 MAC 为 00:30:18:08:03:f5 且分配 IP 的接口。提前致谢