[Expired for systemd (Ubuntu Bionic) because there has been no activity
for 60 days.]

** Changed in: systemd (Ubuntu Bionic)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1869961

Title:
  systemd-networkd ignores RA preference and creates multipath routes
  anyway

Status in systemd package in Ubuntu:
  Expired
Status in systemd source package in Bionic:
  Expired

Bug description:
  When IPv6 ND RAs are sent from two different routers, one with Medium
  and one with High preferences, systemd-networkd will ignore the fact
  they have different preferences and create two multipath routes with
  the same weight.

  I ran a tcpdump of the RAs and confirmed that both have different
  preferences sent.

  i.e.

  nms-mon1:~$ ip -6 route
  2a0d:1a40:7551:6010::/64 dev ens18 proto ra metric 100 pref medium
  fe80::/64 dev ens18 proto kernel metric 256 pref medium
  default proto ra metric 100 
        nexthop via fe80::c030:9cff:fe10:3492 dev ens18 weight 1 
        nexthop via fe80::215:5dff:fe83:c81c dev ens18 weight 1

  Ubuntu version: Ubuntu 18.04.4 LTS
  systemd version: 237-3ubuntu10.39

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