那么DUID究竟是什么?
DUID是DHCP 唯一标识符(DHCP Unique Identifier),每个服务器或客户端有且只有一个唯一标识符,服务器使用DUID来识别不同的客户端,客户端则使用DUID来识别服务器。
后来查看资料发现:
This characteristic of DHCPv6 DUIDs has caused some interesting challenges given the popularity of cloned and/or virtual OSes. OS clones are likely to have identical DUIDs. One would have to manually change it before bringing the host online in a DHCPv6 environment or the DHCPv6 server will assume that DHCPv6 packets from different hosts with the same DUID are in fact all the same host.
上面最主要的部分我已经用红色标红了,大体意思主要就是说系统克隆会导致主机具有相同的DUID,而具有相同DUID的主机会被认为是同一台主机。