Public bug reported:
Binary package hint: network-manager
when setting IPv6 settings to "automatic" instead of the default ignore
(see my eduroam profile) network-manager adds a static default route
after the connection is established. Unfortunately this default route
has no next-hop and thus breaks connectivity quite badly.
root@schleppi:~# ip -6 route
2001::/32 dev teredo proto kernel metric 256 mtu 1280 advmss 1220 hoplimit
4294967295
2001:4ca0:0:f200::/64 dev wlan0 proto kernel metric 256 expires 0sec mtu
1500 advmss 1440 hoplimit 4294967295
fe80::/64 dev wlan0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit
4294967295
fe80::/64 dev is0 proto kernel metric 256 mtu 1280 advmss 1220 hoplimit
4294967295
fe80::/64 dev teredo proto kernel metric 256 mtu 1280 advmss 1220 hoplimit
4294967295
default via fe80::2d0:3ff:fe3b:f400 dev wlan0 proto kernel metric 1024 mtu
1500 advmss 1440 hoplimit 64
default dev wlan0 proto static metric 1024 mtu 1500 advmss 1440 hoplimit
4294967295 <--- this is the broken one
One has to repeatedly delete this static route (I guess nm tries to add
it again) before you have connectivity again.
root@schleppi:~# ip -6 route del default dev wlan0 proto static
root@schleppi:~# ip -6 route del default dev wlan0 proto static
root@schleppi:~# ip -6 route del default dev wlan0 proto static
root@schleppi:~# ip -6 route del default dev wlan0 proto static
RTNETLINK answers: No such process
IPv6 clients learn their default route from RA or from static
configuration, but you cannot just point a default-route to a non-ptp
interface without a next-hop. The kernel will look for every destination
(including ipv6.google.com) on the local network segment and fail after
a 2 second timeout.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: network-manager 0.8.3+git.20101219t181118.e919218-0ubuntu1 [modified:
usr/bin/nm-online usr/bin/nm-tool usr/bin/nmcli
usr/lib/NetworkManager/nm-avahi-autoipd.action
usr/lib/NetworkManager/nm-crash-logger
usr/lib/NetworkManager/nm-dhcp-client.action
usr/lib/NetworkManager/nm-dispatcher.action usr/sbin/NetworkManager]
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic 2.6.37
Uname: Linux 2.6.37-12-generic x86_64
Architecture: amd64
CRDA:
country DE:
(2400 - 2483 @ 40), (N/A, 20)
(5150 - 5250 @ 40), (N/A, 20), NO-OUTDOOR
(5250 - 5350 @ 40), (N/A, 20), NO-OUTDOOR, DFS
(5470 - 5725 @ 40), (N/A, 26), DFS
Date: Wed Jan 19 10:15:57 2011
IfupdownConfig:
auto lo
iface lo inet loopback
Keyfiles: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden
ProcEnviron:
LANGUAGE=de_DE.UTF-8:de:en_GB:en
PATH=(custom, user)
LANG=de_DE.UTF-8
LC_MESSAGES=de_AT.utf8
SHELL=/usr/bin/zsh
SourcePackage: network-manager
WpaSupplicantLog:
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug natty
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https://bugs.launchpad.net/bugs/704812
Title:
[natty] broken IPv6 default route
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