Henrique de Moraes Holschuh <[email protected]> writes: > On Wed, 01 Sep 2021, Bjørn Mork wrote: >> ifupdown has this extremely annoying misfeature that it forces a release >> on shutdown, both for DHCP and DHCPv6. The automatic release on every > > This is *highly* desired *on IPv4*, wherever address pools are scarce.
I disagree. You'll always need enough addresses for all your clients. If you have a stable set of clients, then there is no problem letting a client reboot without releasing the address. If you have a constant client churn, like for example a public hotspot, then you should definitely not depend on clients releasing their address on shutdown. You need to set a short enough lease time. Preferably still long enough to keep the address over a reboot. Releasing the address on shutdown doesn't solve anything. It just creates unnecessary problems. > The correct thing would likely be: do not do it on IPv6, but still do it > on IPv4. Then at least make it configurable. Bjørn
