On 22/01/2021 11:22, Jaime wrote: > Hi. > > A long time ago [1], Simon wrote to the list saying: > > "Be aware that multiple MAC addresses in a single dhcp-host has > different semantics to multiple dhcp-host lines, each with one MAC > address but with the same IP address." > > Is this still true i.e. does a single dhcp-line with multiple MAC > addresses still have different semantics to multiple dhcp-host lines > with the same IP address? If so, how do (/does) the semantics differ? > > Thank you, Jaime > > [1] > http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2013q4/007972.html >
Yes. The difference is that in the normal case of multiple lines, once the IP address is leased to a MAC address, if another MAC address turns up asking for a lease, it won't be offered that IP address (typically it will be offered one from the pool) With multiple MAC addresses on a single line, when the second MAC address turns up, the IP address will be unceremoniously ripped away from the first MAC address, and given to the second one. In this case the owners of the two MAC addresses better 1) be the same machine and 2) expect this behaviour. Typically it's a laptop which downs its wireless interface and brings up the wired interface when docked. Cheers, Simon. _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
