Hi Marc On Fri, 07 Jul 2017 17:52:04 +0200 Marc Haber <mh+debian-packa...@zugschlus.de> wrote: > Package: systemd > Version: 232-25 > Severity: normal > Tags: ipv6 > > Hi, > > I do have a system with systemd-networkd. IPv6AcceptRA is set to 1, > which is not strictly needed, but I can easily dream up a use case > where this is actually useful. > > In the .network unit file, I have an IPv6 Gateway set statically: > > [1/847]mh@milonga:~ $ cat /etc/systemd/network/milonga.network > [Match] > Name=e* > > [Network] > Gateway=2001:db8::1 > IPv6AcceptRA=yes > DHCP=no > > [Address] > Address=2001:db8::43:100/64 > > When this system boots, it learns IPv6 default gateways from a HSRP > pair of routers, resulting in this routing table: > > 2001:67c:24f8:1002::/64 dev eth0 proto kernel metric 256 pref medium > 2001:67c:24f8:1002::/64 dev eth0 proto ra metric 1024 pref medium > fe80::/64 dev eth0 proto kernel metric 256 pref medium > default metric 1024 > nexthop via 2001:67c:24f8:1002::1 dev eth0 weight 1 > nexthop via fe80::21d:70ff:fe9f:65a0 dev eth0 weight 1 > nexthop via fe80::21e:13ff:fe22:b510 dev eth0 weight 1 > > I am not sure whether it has any negative effects that the /64 route > is entered twice. > > The HSRP pair of routers has RA disabled. It will, however, answer > router solicitations, a behavior which cannot be turned off on Cisco > devices. > > When the SLAAC learned IP address and routes expire, systemd-networkd > removes the statically set default route as well, leaving the system > without IPv6 connectivity outside the local network. > > Expected behavior would be to leave the statically set route in place. > > A workaround is setting IPv6AcceptRA=no, but this means that even after > sending a router announcement, the system will not learn a new IP > address. Sending out a router announcement is a frequently used trick to > access a system whose network init has failed in some way and therefore > the static IP address failed to show up.
Is this still an issue with 241-1 from unstable? If so, it would be great if you can file a bug report upstream at https://github.com/systemd/systemd/issues Unfortunately I don't have a network setup where I could easily reproduce the issue myself so it's better if you talk to upstream directly. Regards, Michael -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth?
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