Il giorno sab 23 ago 2025 alle ore 13:27 Thibaut <[email protected]> ha scritto: > > > > > Le 23 août 2025 à 12:55, Christian Marangi (Ansuel) <[email protected]> > > a écrit : > > > > Il giorno sab 23 ago 2025 alle ore 12:42 Goetz Goerisch > > <[email protected]> ha scritto: > >> > >> Thank you for the feedback. > >> > >>>> 3. Saving the current IPv6 prefix on the WAN port (obtained from > >>>> the ISP) to a file. If the router reboots due to power loss, and > >>>> the ISP changes the IPv6 prefix in the next boot, the old prefix > >>>> can be invalidated in a Router Advertisements to prevent IPv6 > >>>> outages in the LAN due to stale addresses. This is known as "Flash > >>>> Renumbering Workaround Across Reboot", a recommended feature by > >>>> RFC 9096 to work around broken ISPs. This need is raised in a recent > >>>> odhcpd development discussion [3], and is my motivation of sending > >>>> this mail. > >>> > >>> I think this is the most useful feature. > >>> > >>> If implemented properly, it should result in a single write (per prefix > >>> assignment from the ISP, which, for sane ISPs, means only 1) which is no > >>> worse than the writes performed during firstboot: it shouldn’t be very > >>> controversial. > >> > >> Unfortunately at least for residential users in Germany this means > >> typically one write per 24h. As the prefix assignments are dynamic and > >> ISPs even today still do force reconnects every 24h. > > *ugh* that’s brain damaged. > > >> Although > >> recommendations on best current operational practice e.g., RIPE 690 > >> [1] exist. > >> > >> [1] https://www.ripe.net/publications/docs/ripe-690/ > >> > >> I would fully support that RFC9069 should be implemented for OpenWrt. > >> > > > > We need to save it only on reboot so we don't need to write stuff > > periodically every day. > > Aside from panic conditions that we can't handle, we can attach any > > kind of logic to be > > done when reboot is called. > > As I was pointing out earlier, how many users do you think actually « reboot > » their devices? (outside of OpenWrt devs, that is ;P) > > Panics are pretty irrelevant because the elephant in the room is it’s either > going to be power loss, i.e. « let’s unplug it » (or actual power loss, even) > or « it doesn’t work, let’s turn it off and on again », at which point a > reboot (or more precisely a *shutdown*) handler will be totally useless. >
Well then we should follow John idea and make it configurable. Maybe we can enable it for eMMC by default? _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/mailman/listinfo/openwrt-devel
