准备

配置网卡脚本添加ip脚本
secondary_vnic_all_configure.sh

开始

创建vcn

使用vcn向导,输入名称之后，一切默认
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创建完成点进去，把专用ip的先删除了(不删也行)
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附加vnic

点击创建vnic，选中刚刚创建的vcn(虚拟云网络),子网，选择跳过源目的地检查
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添加ip

打开cloudshell
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wget https://docs.oracle.com/en-us/iaas/Content/Resources/Assets/secondary_vnic_all_configure.sh
chmod +x secondary_vnic_all_configure.sh
./secondary_vnic_all_configure.sh -c
ip addr show

看到有两个地址，添加成功
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设置成服务，开机启动

sudo cp /tmp/secondary_vnic_all_configure.sh /usr/local/sbin
sudo nano /etc/systemd/system/secondary_vnic.service

内容

[Unit]
Description=Setting the secondary vnic
After=default.target
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/sbin/secondary_vnic_all_configure.sh -c
[Install]
WantedBy=multi-user.target

设置开机启动

sudo systemctl enable secondary_vnic.service
sudo reboot