Once upon a time, Beniamino Galvani <bgalv...@redhat.com> said: > In practice, it's a bit more complex than that. network-online.target > is emitted after all NM connections succeed. The meaning of "success" > depends on properties "ipv4.may-fail" and "ipv6.may-fail" of the > connection profile. Normally they are both set to "yes" and this means > that just one of IPv4 and IPv6 is enough to reach the activated state. > > If the connection has static IPv4 addresses and "auto" IPv6 > (i.e. SLAAC plus optionally DHCPv6), before enabling ACD it was > guaranteed that IPv4 addresses were added before reaching > network-online. After enabling ACD, both IPv4 ACD and IPv6 SLAAC are > started in parallel and the first that completes will make the > connection succeed. However, in practice IPv6 also requires DAD and > the timeout is longer than the IPv4 ACD timeout; so, services that > bind to static IPv4 addresses can still rely on the addresses being > present after network-online.target is reached. > > Of course, in case of services that bind IPv4 to addresses, the best > solution is to set "ipv4.may-fail=no" (or for IPv6 addresses, > "ipv6.may-fail=no") in the connection profile. That is required when > using "auto" methods, in order to avoid the situation where the > connection succeeds after the "other" address family completes.
Thanks for that detailed explanation! I had't seen that level of what network-online.target actually means. -- Chris Adams <li...@cmadams.net> -- _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
