On Wed, Sep 25, 2024 at 08:16:09PM +0200, Jan Ceuleers wrote: > On 25/09/2024 11:06, Simon Kelley wrote: > > Downsides to this proposed change. > > > > 1) Old versions of Windows might break. > > 2) Newer versions of windows might break - we've not done testing on > > which do and don't. > > 3) Other platforms which have made the same mistake might break. > > 4) Dnsmasq installations which unkowningly rely on this behaviour in > > other respects might break. > > > > Upsides to the proposed change. > > 1) ~1% more available addresses in DHCP pools.
Even less then one procent > > 2) A small amount of code which no longer needs maintenance. > > > > It's not clear to me what the balance is here. Opinions, list? As Wink Saville said: It's not worth it. And IMNSHO the pain inflicted on sysadmins by any of the downsides points does **not** justify marginal upside points. > > Simon. > > The reason why I raised this subject is of course the fact that it > enables the use of IP addresses in DHCP pools that are not otherwise > available for use. Lets assume a /23 block of IPv4 address is a DHCP pool. The discussed change would be the difference of 508 and 510. ( /23, 512 addresses, 510 being 512 minus "broadcast" and minus "network", 508 being 510 minus .255 and minus .0) 510 - 508 = 2, 2 out 512 is about 0.39%. On a /22 block, 1024 address, 6 address "saved", 6/1024*100%, 0.58% (6+8)/2024 = 0.68% (6+8+16)/4096 = 0.73% I would love to meet admins who have a /19 in 1 DHCP pool. > IPv4 addresses are a scarce resource, and maximising their use is, in my > opinion, a worthy goal. IPv4 address space depletion is being addressed with IPv6. > But if the dnsmasq project isn't ready to remove this restriction, would > a patch be accepted that makes it configurable? If so, what should the > default be? > > Thanks, Jan Groeten Geert Stappers -- Silence is hard to parse _______________________________________________ Dnsmasq-discuss mailing list [email protected] https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
