尽管 20.04 LTS 上的 IP 是静态的，但在启动时仍分配了链路本地 169.254.xx 地址

Question

原来问题出在/etc/dhcpcd.conf。

当从移动NetworkManager到时systemd-networkd，我注释了该文件的末尾，其中包含接口的名称（据我记得，nmtui当我尝试两个静态 IP 时，它已经自动填充了我所做的 NetWork Manager 更改）。

我怀疑 DHCP 客户端（WAN NIC 所需eno1）也尝试为 LAN NIC 分配一个地址，因为它不知道它是静态的（因为我在中没有这么说dhcpcd.conf），并且在没有响应的情况下它分配了一个169.254.x.x地址。它现在可以正常工作，在末尾添加 2 行后，我只有一个静态地址/etc/dhcpcd.conf：

interface enp1s0
   static ip_address=192.168.9.1/24

我想，如果我安装的是 Ubuntu 服务器而不是桌面版，我就可以节省几个小时的设置时间，而不必切换到systemd-networkd。但在此过程中我学到了很多东西。

笔记：自从我发布了我的问题后，我已经设置了一个 DHCP 服务器（isc-dhcp-server），为了使其工作，我不得不删除别名lan1，因此我重新使用enp1s0（而不是lan1上面的问题中的使用）。

在职的/etc/dhcpcd.conf：

# A sample configuration for dhcpcd.
# See dhcpcd.conf(5) for details.

# Allow users of this group to interact with dhcpcd via the control socket.
#controlgroup wheel

# Inform the DHCP server of our hostname for DDNS.
hostname

# Use the hardware address of the interface for the Client ID.
#clientid
# or
# Use the same DUID + IAID as set in DHCPv6 for DHCPv4 ClientID as per RFC4361.
# Some non-RFC compliant DHCP servers do not reply with this set.
# In this case, comment out duid and enable clientid above.
duid

# Persist interface configuration when dhcpcd exits.
persistent

# Rapid commit support.
# Safe to enable by default because it requires the equivalent option set
# on the server to actually work.
option rapid_commit

# A list of options to request from the DHCP server.
option domain_name_servers, domain_name, domain_search, host_name
option classless_static_routes
# Respect the network MTU. This is applied to DHCP routes.
option interface_mtu

# Most distributions have NTP support.
option ntp_servers

# A ServerID is required by RFC2131.
require dhcp_server_identifier

noipv6rs
noipv6

# Generate SLAAC address using the Hardware Address of the interface
#slaac hwaddr
# OR generate Stable Private IPv6 Addresses based from the DUID

# mc 2020-07-18 commented below
#slaac private
interface enp1s0
        static ip_address=192.168.9.1/24
        #static routers=192.168.1.1
        #static domain_name_servers=9.9.9.9
#interface eno1
#        static ip_address=192.168.1.111/24
#        static routers=192.168.1.1
#        static domain_name_servers=9.9.9.9 149.112.112.112

Answer 1