When I start new containers, Docker automatically assigns some MAC address to them. I am curious if there is a pattern to this assignment. Can the MAC address be changed?

当我启动新的容器时，Docker会自动为它们分配一些MAC地址。我很好奇这个作业是否有规律可循。是否可以更改MAC地址？

$ docker network inspect bridge

$DOCKER网络检查桥

"Containers": {
            "3386a527aa08b37ea9232cbcace2d2458d49f44bb05a6b775fba7ddd40d8f92c": {
                "EndpointID": "647c12443e91faf0fd508b6edfe59c30b642abb60dfab890b4bdccee38750bc1",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            },
            "94447ca479852d29aeddca75c28f7104df3c3196d7b6d83061879e339946805c": {
                "EndpointID": "b047d090f446ac49747d3c37d63e4307be745876db7f0ceef7b311cbba615f48",
                "MacAddress": "02:42:ac:11:00:03",
                "IPv4Address": "172.17.0.3/16",
                "IPv6Address": ""
            }

Docker start assigning always the same mac 02:42:ac:11:00:02 for the first container and then is increasing by one each mac for each different container.

Docker开始为第一个容器分配始终相同的Mac 02：42：AC：11：00：02，然后为每个不同的容器增加一个Mac。

Not sure why they are using that mac address. It seems 02:42:ac doesn't match any real vendor in oui databases. Look at the official documentation about this. They say:

不确定他们为什么要使用那个Mac地址。似乎02：42：AC与OUI数据库中的任何真实供应商都不匹配。看看关于这一点的官方文件。他们说：

The MAC address is generated using the IP address allocated to the container to avoid ARP collisions, using a range from 02:42:ac:11:00:00 to 02:42:ac:11:ff:ff

Anyway, you can set any mac address on container generation using --mac-address parameter on the docker run command. For example doing a command like this docker run -ti --mac-address 00:00:00:00:00:11 ubuntu:trusty

无论如何，您可以在docker run命令上使用--mac-Address参数在容器生成时设置任何Mac地址。例如，执行如下命令：docker run-ti--mac-Address 00：00：00：00：00：11 ubuntu：trusty

Hope it helps.

希望有帮助。

If you look at the MAC address of the container interface(s), you can see that the last 4 octets are the hex representation of the IPv4 address. This part is prefixed by 02:42:
For example:-

如果您查看容器接口(S)的MAC地址，您可以看到最后4个二进制八位数是IPV4地址的十六进制表示。此部分以02：42为前缀：例如：-

The docker generated MAC address of the container interface with IPv4 address 172.19.0.6 would be 02:42:ac:13:00:06

对接程序生成的IPv4地址为172.19.0.6的容器接口的MAC地址为02：42：AC：13：00：06

The MAC addresses for Docker all begin with 02:42. The remaining four octets represent the IP address of the container in hex. 0xAC in hex is 172 in decimal, 0x11 is 17, 0x00 is, well, 0, and 0x02 is... 2. Thus this MAC address represents a container with the IP address 172.17.0.2. The default Docker bridge network is always given the IP range 172.17.0.0/16 by default, thus this would be the MAC address of the virtual Ethernet adapter given to the first container you run on a fresh Docker install.

Docker的MAC地址都以02：42开头。其余四个二进制八位数以十六进制表示容器的IP地址。十六进制的0xAC是十进制172，0x11是17，0x00是0，0x02是...2.因此，该MAC地址代表IP地址为172.17.0.2的容器。默认情况下，默认的Docker网桥网络的IP范围始终为172.17.0.0/16，因此这将是您在全新的Docker安装上运行的第一个容器所使用的虚拟以太网适配器的MAC地址。

See https://maclookup.app/faq/how-do-i-identify-the-mac-address-of-a-docker-container-interface for more information.

有关详细信息，请参阅https://maclookup.app/faq/how-do-i-identify-the-mac-address-of-a-docker-container-interface。