马春杰杰实验室的服务器线路大升级，由原来的静态IP升级为动态IP，直接走长清的线路，速度快的一匹，直接从百兆升级到千兆~
所以配置下动态IP和静态IP共存，方便两个IP段连接~
首先，查看目前的网卡情况：
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(base) mcj@ubuntu:~$ ifconfig docker0 Link encap:Ethernet HWaddr 02:42:72:59:52:b3 inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) eno1 Link encap:Ethernet HWaddr f4:02:70:9d:75:d4 inet addr:172.16.150.201 Bcast:172.16.150.255 Mask:255.255.0.0 inet6 addr: fe80::f602:70ff:fe9d:75d4/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:91498 errors:0 dropped:0 overruns:0 frame:0 TX packets:108528 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:13131776 (13.1 MB) TX bytes:38875180 (38.8 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:599 errors:0 dropped:0 overruns:0 frame:0 TX packets:599 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:75328 (75.3 KB) TX bytes:75328 (75.3 KB) |
可以看到，目前生效的网卡是eno1，接下来，打开/etc/network/interfaces文件，配置如下：
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auto lo iface lo inet loopback auto eno1 iface eno1 inet dhcp dns-nameservers 119.29.29.29 8.8.8.8 post-up ip addr add 172.16.150.201/24 dev eno1 pre-down ip addr del 172.16.150.201/24 dev eno1 |
配置之后，直接运行systemctl restart networking重启网络即可，或者reboot重启电脑~
最后使用ip addr show查看最新IP就行了~
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(base) mcj@ubuntu:~$ ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether f4:02:70:9d:75:d4 brd ff:ff:ff:ff:ff:ff inet 10.170.3.9/16 brd 10.170.255.255 scope global eno1 valid_lft forever preferred_lft forever inet 172.16.150.201/24 scope global eno1 valid_lft forever preferred_lft forever inet6 fe80::f602:70ff:fe9d:75d4/64 scope link valid_lft forever preferred_lft forever 3: eno2d1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether f4:02:70:9d:75:d5 brd ff:ff:ff:ff:ff:ff 4: enp137s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether a0:36:9f:ed:94:50 brd ff:ff:ff:ff:ff:ff 5: enp137s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000 link/ether a0:36:9f:ed:94:52 brd ff:ff:ff:ff:ff:ff 6: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:72:59:52:b3 brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft forever |
解释下：
-
当接口启动完成（完成
DHCP获取地址之后）执行ip addr add 172.16.150.201/24 dev eno1，即 在eno1接口上额外添加一个静态地址172.16.150.201，子网掩码/24（255.255.255.0）。-
这样 eno1 同时会有：
-
DHCP分配的动态IP -
手动加的
172.16.150.201静态IP（多地址共存）
-
-
- 在接口关闭（
ifdown）前执行pre-down ip addr del 172.16.150.201/24 dev eno1，这里是把在post-up里添加的那个静态IP删除掉，保持接口关闭后干净的状态。没有这一行的话，IP可能会残留到下一次up/down，也可能会造成网络冲突。
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