netdev - fe80::/64 route missing on GRE tunnels

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Message-ID: <20140211215510.GA6994@sesse.net>
Date:	Tue, 11 Feb 2014 22:55:11 +0100
From:	"Steinar H. Gunderson" <sgunderson@...foot.com>
To:	netdev@...r.kernel.org
Cc:	itk-intern@...fundet.no
Subject: fe80::/64 route missing on GRE tunnels

Hi,

It seems that recent kernels no longer automatically add the link-local route
to GRE tunnels. 3.10.27 does it right:

  root@...gental:~# ip tunnel add foo mode gre remote 1.2.3.4 ttl 64
  root@...gental:~# ip link set foo up mtu 1468
  root@...gental:~# ip -6 route show dev foo
  fe80::/64  proto kernel  metric 256 

but on 3.13.1, no such route shows up. I can add it manually, though.

This broke our in-house IPv6 tunnel broker (which essentially uses link-local
addresses over GRE tunnels to bring up BGP sessions). Do you think you could
have a look?

/* Steinar */
-- 
Homepage: http://www.sesse.net/
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