Linux 添加链接本地地址
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Adding link local address
提问by Maddy
If the IPv6 link-local address is manually deleted on an interface, is there a way to obtain the link-local address back without bringing the interface down? The requirement stems from the need to hold onto (IPv4) existing connections on the interface, but also obtain the link-local address on it.
如果在接口上手动删除 IPv6 链路本地地址，是否有办法在不关闭接口的情况下获取链路本地地址？该要求源于需要保持接口上的 (IPv4) 现有连接，而且还需要获取其上的链路本地地址。
采纳答案by sleinen
GNU/Linux systems typically use "ip" (from the "iproute" package) to configure addresses. A link-local address would be added using something like
GNU/Linux 系统通常使用“ip”（来自“iproute”包）来配置地址。将使用类似的方法添加链接本地地址
ip address add dev eth4 scope link fe80::21b:21ff:febb:5db0/64
Did you try that?
你试过吗？
If your problem is that you don't know what exact address you should use as the link-local address: These addresses are typically derived from the hardware (MAC) address of the interface.
如果您的问题是您不知道应该使用哪个确切地址作为链接本地地址：这些地址通常来自接口的硬件 (MAC) 地址。
Take the MAC address of the interface (the "link/ether" field in the result of "ip link show dev ..."), and convert it to Modified EUI-64 according to this procedure.
获取接口的MAC地址（“ip link show dev ...”结果中的“link/ether”字段），并按照此过程将其转换为Modified EUI-64 。
Then add "fe80::" (standard link-local prefix) to the left and "/64" (as the subnet prefix length) to the right.
然后在左侧添加“fe80::”（标准链路本地前缀），在右侧添加“/64”（作为子网前缀长度）。
