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Two Fedora 20s loose their public IPv6 address

asked 2013-12-01 10:54:19 -0500

PKraszewski gravatar image


I have a two F20 boxes configured for IPv6 via RouterAdvertisments (rtadvd on Debian gateway). Both boxes configure correctly on boot. However, after some time (say a few days) they suddenly drop their public IPv6 address - not at the same time as far as I noticed. They still get ICMP6 RA packets (verified with tcpdump), but just ignore them. Some FreeBSDs 10.0B3 on the same network work flawlessly, so it doesn't look like a server-side problem.

Same configuration worked fine with F19 (and yes I know F20 is preliminary edition).

What to look for? Where to report details?

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answered 2013-12-20 06:29:30 -0500

Jens gravatar image

updated 2013-12-20 07:42:56 -0500

Same here, too. Really bad.

Actually "ip -f inet6 route" shows correct (?) routing, but "ip addr" shows only a link-local. Please fix that soon I don't want to downgrade.

Looks like NetworkManager is the culprit. This is also nice:

[root@localhost jens]# nmcli n

* (process:7885): CRITICAL *: nm_ip6_route_set_prefix: assertion 'prefix > 0' failed


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answered 2014-01-19 06:42:48 -0500

Can confirm. Are your privacy extensions are also broken? See

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answered 2013-12-19 09:53:36 -0500

Same here. Tested on two boxes. Fedora 20 broke IPv6.

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Asked: 2013-12-01 10:54:19 -0500

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Last updated: Jan 19 '14