Re: Problem with IPv6 privacy addresses in 7.0
Tj <[email protected]>
| Newsgroups | dev.linux.lists.regressions,org.kernel.vger.netdev |
|---|---|
| Message-ID | <[email protected]> |
On 29/05/2026 20:04, Stefano Brivio wrote: > On Fri, 29 May 2026 18:28:58 +0000 > Tj <[email protected]> wrote: > >> I believe I hit this on a router using Debian 13 with v7.0.* kernel this week that >> uses systemd-networkd to configure IPV6 RA and prefix delegation after >> moving from v6.19.*. >> >> Symptom was the router could no longer reach public IPv6 addresses >> itself but forwarding was unaffected. >> >> The ISP (Starlink) provides a /64 prefix via RA and a /56 via DHCPv6. networkd >> allocates a static suffix address from both to the WAN-side interface. >> >> I discovered after much experimentation that instead of the usual /56 >> address being the source it was choosing the /64 and failing. > Do you really mean an address configured as /56, or a /64 address that > systemd-networkd derives from a /56 delegated prefix? Apologies - I should have been clearer. I meant addresses generated *from the* respective prefixes - the addresses themselves are /64, yes!