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[Mathieu Trudel-Lapierre <mathieu.tl@xxxxxxxxx>]

Well, I had opened this bug due to a different issue.

I'll close this as Fix Released now because AFAICT, everything is fine
on the system here. It definitely is here, IPv6 is absolutely usable in
DHCPv6 (and really should be in SLAAC too).

Robie, please open a separate bug using 'ubuntu-bug network-manager' and
include the output of 'ip -6 route list' before making any changes to
the connection so we can confirm exactly what's going on. Maybe it's
specific to some settings I'm not using here. (although we really should
have caught this in the testing that was done prior to uploading the
patches).

Note that the error message "missing attribute" is kind of normal and
should be covered by a second pass of trying to replace the default
route.

** Changed in: network-manager (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/832045

Title:
  NM fails to add IPv6 routes with netlink errors

Status in “network-manager” package in Ubuntu:
  Fix Released

Bug description:
  NM appears to work properly and does give me an IP address, but there
  are error messages indicative of something wrong in adding routes:

  Aug 23 09:08:11 artemis NetworkManager[1050]: <info> Activation (wlan0) Stage 3 of 5 (IP Configure Start) starting DHCPv6 as requested by IPv6 router...
  Aug 23 09:08:11 artemis NetworkManager[1050]: <warn> Failed to add route Object not found
  Aug 23 09:08:11 artemis NetworkManager[1050]: <error> [1314104891.882457] [nm-device.c:1782] dhcp6_start(): (wlan0): failed to add IPv6 multicast route: Object not found
  Aug 23 09:08:15 artemis NetworkManager[1050]: nm_ip6_config_add_nameserver: assertion `IN6_ARE_ADDR_EQUAL (nameserver, &nameservers[i]) == FALSE' failed
  Aug 23 09:08:16 artemis NetworkManager[1050]: <warn> Failed to add route Missing attribute
  Aug 23 09:08:16 artemis NetworkManager[1050]: <error> [1314104896.421195] [nm-system.c:1036] nm_system_replace_default_ip6_route(): (wlan0): failed to set IPv6 default route: -1
  Aug 23 09:08:16 artemis NetworkManager[1050]: <info> Policy set 'cyphermox.net' (wlan0) as default for IPv6 routing and DNS.
  Aug 23 09:08:16 artemis NetworkManager[1050]: <info>   nameserver 'xxxxxxxxx'
  Aug 23 09:08:16 artemis NetworkManager[1050]: nm_ip6_config_add_nameserver: assertion `IN6_ARE_ADDR_EQUAL (nameserver, &nameservers[i]) == FALSE' failed
  Aug 23 09:08:17 artemis NetworkManager[1050]: <warn> Failed to add route Missing attribute
  Aug 23 09:08:17 artemis NetworkManager[1050]: <error> [1314104897.429011] [nm-system.c:1036] nm_system_replace_default_ip6_route(): (wlan0): failed to set IPv6 default route: -1

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